PhD track in Physics
Program | PhD track in Physics |
ECTS Credits | 120 (first two years) |
Language | English |
Orientation | Research |
Location | Palaiseau Campus and partner institutions |
Course duration | two years (coursework period), followed by a three-year dissertation phase |
Course start | September |
Degrees awarded | Master’s degree (after the first two years), PhD (on completion of the dissertation) |
WHY ENROLL IN THIS PROGRAM?
Asset n° 1
Get ready for a PhD by starting research at an early stage
Asset n°2
Be closely associated with the research activities carried out in a world-renowned innovation cluster
Asset n°3
Benefit from individual and personalized supervision by a faculty member
As our world faces tremendous challenges related to environmental needs, energy, transport, information technologies, biotechnology or space engineering, physics provides both a means to address some of the most urgent societal issues and a marvelous intellectual challenge. Physics, in synergy with chemistry, materials science, biology, pure and applied mathematics, computer science, mechanical engineering or economics has been and will remain the driving force for technological progress. Thanks to its versatile methodologies it is moreover a key tool even for problems that are inherent to these neighboring disciplines. Last but not least, physics harbors some of the most mind-bugling scientific revolutions of the last century, such as quantum mechanics or relativity, providing us breathtaking insights into the structure of matter, the nature of light, the life of stars or the Big Bang. Modern research is both a consequence and a direct continuation of this intellectual adventure, continuing the quest for understanding the world around us.
The Institut Polytechnique de Paris with its world-class Research Center covering all fields of physics as well as its interfaces with chemistry, pure and applied mathematics, biology, mechanical engineering, computer science or economics provides a unique environment for students motivated by a PhD Track program.
This five-year PhD Track starts with a two-year period with advanced courses related to the chosen field of study. Students also participate in research projects carried out by Institut Polytechnique de Paris Laboratories involved in the track and attend research seminars. Supervised by faculty or senior researchers, they benefit from first-class research experience. At the end of the second year, the students who meet the academic requirements receive a Master Degree. Those who have achieved outstanding results and identified a thesis subject and a supervisor in one of the involved Labs are allowed to start a three-year PhD program.
Objectives
- Provide a coherent training program to students attracted by research, from theory and modeling to experimental physics and applications in various domains
- Acquire a high level knowledge of the scientific basis related to physics or plasma physics and to their applications
- Choose a specialization among a variety of fields related to theoretical and experimental condensed matter physics, mathematical physics, statistical physics, high-energy physics, biophysics, nanosciences, macroscopic physics and complex systems, lasers and optics, thermonuclear fusion, laser-produced plasmas, space plasmas and low-temperature plasmas, within the rich offer of IP Paris.
- Integrate into the world of research by spending time within the research Labs, conducting a research project under the supervision of a faculty member, writing a research report and preparing a first manuscript for publication in an international peer-reviewed journal.
The five-year curriculum of the PhD track trains students in cutting-edge research for them to pursue international careers in prestigious universities or leading companies in their domain.
The first two years of the PhD track are based on the Physics [1] Masters year 1 and year 2 at Institut Polytechnique de Paris. Every year, the program of every student has to be discussed and validated by his/her tutor, who is a member of the IP Paris faculty. According to the student’s specialization wishes, the course program will be individualized as much as possible.
The academic year of M1 physics is divided in three periods. During quarters 1 and 2 students will follow courses and participate to Research Projects in the laboratories of the Institut Polytechnique de Paris. During quarter 3 students will complete a research internship in one of the Institut Polytechnique de Paris laboratories or in an external institute (which could be in France or abroad).
Quarter 1
Students choose three core courses and one optional course among the ones that correspond to their major. Note that depending on the major, some core courses are mandatory. The optional course can be replaced by a Research Project in one of the Institut Polytechnique de Paris laboratories (to be defined on site).
Core courses
Mandatory Relativistic field theory |
5 ECTS English |
Astrophysics |
5 ECTS English |
Mandatory |
5 ECTS English |
Quantum optics I: Lasers |
5 ECTS English |
Quantum physics of electrons in solids |
5 ECTS English |
Elective courses
Numerical physics |
5 ECTS English |
Cosmology |
5 ECTS English |
Group theory |
5 ECTS English |
Core courses
Relativistic field theory |
5 ECTS English |
Astrophysics |
5 ECTS English |
Quantum optics I: Lasers |
5 ECTS English |
Quantum physics of electrons in solids |
5 ECTS English |
Atomic and molecular physics |
5 ECTS English |
Elective courses
Numerical physics |
5 ECTS English |
Cosmology |
5 ECTS English |
Material design |
5 ECTS English |
Core courses
Quantum optics I: Lasers |
5 ECTS English |
Quantum physics of electrons in solids |
5 ECTS English |
Physique des objets biologiques |
5 ECTS Français |
Surfaces molles |
5 ECTS Français |
Elective courses
Numerical physics |
5 ECTS English |
Material design |
5 ECTS English |
Core courses
Relativistic field theory |
5 ECTS English |
Quantum optics I: Lasers |
5 ECTS English |
Mandatory Quantum physics of electrons in solids |
5 ECTS English |
Atomic and molecular physics |
5 ECTS English |
Elective courses
Numerical physics |
5 ECTS English |
Group theory |
5 ECTS English |
Material design |
5 ECTS English |
Quarter 2
Students choose three core courses and one optional course among the ones that correspond to their major. Note that depending on the major, some core courses are mandatory. The optional course can be replaced by a Research Project in one of the Institut Polytechnique de Paris laboratories (to be defined on site).
Core courses
Mandatory Perturbative quantum field theory |
5 ECTS English |
Mandatory |
5 ECTS English |
General relativity |
5 ECTS English |
Elective courses
Experimental high energy physics |
5 ECTS English |
Black holes |
5 ECTS English |
General relativity |
5 ECTS English |
Core courses
Quantum optics II: photons |
5 ECTS English |
Optoelectronics |
5 ECTS English |
Thermonuclear fusion |
5 ECTS English |
Mesoscopic and topological matter |
5 ECTS English |
Elective courses
Experimental high energy physics |
5 ECTS English |
Black holes |
5 ECTS English |
Non-linear optics |
5 ECTS English |
Spintronic |
5 ECTS English |
Trends in material science |
5 ECTS English |
Physics of the environnement |
5 ECTS English |
Nuclear reactors |
5 ECTS English |
Quantum information |
5 ECTS English |
Core courses
Optoelectronics |
5 ECTS English |
Mesoscopic and topological matter |
5 ECTS English |
Nanomaterials |
5 ECTS Français |
Complex systems |
5 ECTS Français |
Polymers, membranes and cells |
5 ECTS Français |
Semiconductors |
5 ECTS Français |
Elective courses
Spintronic |
5 ECTS English |
Trends in material science |
5 ECTS English |
Quantum information |
5 ECTS English |
Core courses
Mandatory Quantum optics II: photons |
5 ECTS English |
Mesoscopic and topological matter |
5 ECTS English |
Semiconductors |
5 ECTS English |
Quantum informatics |
5 ECTS English |
Elective courses
Spintronic |
5 ECTS English |
Trends in material science |
5 ECTS English |
Quantum information |
5 ECTS English |
Quarter 3 - Internships
During the third quarter, students will follow one of the internships proposed by the program associated with the corresponding major. These internships of 4-6 months will take place at Institut Polytechnique de Paris or other institutions of excellence abroad. The internship is worth 20 ECTS
- Fields and particles
- Astrophysics and cosmology
Lasers, Quantum optics and Plasma
- Condensed Matter Physics
- Semiconducting devices
- Soft Matter, complex fluids and biomechanics
- Lasers, Quantum optics and Plasmas
- Condensed Matter Physics
- Semiconducting devices
- Quantum technologies and quantum materials
- Center for Theoretical Physics (CPHT)
- Photovoltaic Institute (IPVF)
- Leprince-Ringuet Laboratory (LLR)
- Laboratory for Applied Optics (LOA)
- Laboratory for Optics in Biology (LOB)
- Laboratory of Plasma Physics (LPP)
- Laboratory of High Intensity Lasers (LULI)
- Laboratory for Irradiated Solids (LSI)
- Laboratory for Condensed Matter Physics (PMC)
- Laboratory for Interfaces and Thin Films (PICM)
Partner laboratory
For updated information on current research projects and contact details of faculty members working in these areas, applicants are invited to check out the webpages of the laboratories as well as of the “Ecole Universitaire de Recherche” (EUR) in Plasma Science and Training (Plasma_ST).
Admission requirements
Academic prerequisites
Completion of a Bachelor in physics, with highest honors, at Institut Polytechnique de Paris or equivalent in France or abroad.
Evidence of research potential is essential as the main goal of such a PhD program is to train first class researchers.
Students who have completed the first year of an equivalent program may be directly admitted into the second year (4-year PhD program).
Language prerequisites
A certificate of proficiency in English (level B2) is required (TOEIC, IELTS, TOEFL, Cambridge ESOL), except for native speakers and students who previously studied in English.
How to apply
Applications are exclusively online. You will be required to provide the following documents:
- Transcript
- Two academic references (added online directly by your referees)
- CV/resume
- Statement of purpose indicating which 2 choices of research subjects among the one listed on this page under the section "PhD Track Research Projects"
You will receive an answer in your candidate space within 2 months following the closing date of the application session.
Fees and scholarships
Registration fees are available here
Find out more about scholarships
Please note that fees and scholarships may change for the following year.
Applications and admission dates
When applying to the PhD Tracks in Physics, you should describe your preferred fields of study and research in your motivation letter. You are ecouraged to choose two preferred PhD Track subjects among the list below. Since the posted offers do not cover the full spectrum of our activities, you can also visit the web pages of the 11 laboratories (CPHT, IPVF, LLR, LOA, LOB, LPICM, LPMC, LPP, LSI, LULI, Omega) affiliated to the physics department and indicate the research lines that interest you the most.
PhD Track research projects in "Physics"
- Guiding electric discharges in air using femtosecond laser filamentation
- Laser diagnostics of pulsed nanosecond plasma for biomedical application
- Ionization waves at a plasma-semiconductor interface
- H2 plasma for enabling phase-transformations during in-situ observations of the growth in the NanoMAX transmission electron microscope
- Turbulence in Fusion Plasma; Wave propagation in turbulent plasma in presence of sheared flow
- Collective plasma wave amplification for multiple laser beam configuration in the context of Laser MJ
- Intense attosecond light pulses from a relativistic plasma mirror
- Towards extreme beams and strong-field quantum electrodynamics experiments
- Coherent Beam Combining femtosecond digital laser
- Innovative concepts for particles plasma acceleration and radiation emission in laser
- Probabilistic and spectral insights onto diffusion-controlled reactions in chemistry and biology
- Structural imaging of healthy and pathological tissues using multiphoton microscopy
- Large-scale multiphoton microscopy of developing heart and brain tissue
- Understanding quadruplex formation by C-rich DNA sequences: the i-motif
- Corneal Transparency Diagnostics By Smart OCT and Deep Learning
- Novel Modeling of Coherent Multiphoton Microscopy Contrasts
- Mid-infrared femtosecond spectroscopy in proteins
- Early Detection and Identification of Diseased Human and Vegetal Tissues Using Visible / Infrared Polarimetric Microscopy Combined with Conventional and AI-based Image Analysis
- Mueller polarimetric imaging for biomedical diagnosis
- Modeling of polarized ligth interaction with the uterine cervix
- In vivo nonlinear optical microscopy of nervous tissue: lipid and metabolism imaging
- Correlated quantum matter and quantum information
- Ultrafast dynamics of electrons in quantum materials
- Theoretical study of electron-phonon coupling and of carrier dynamics in materials for potential photovoltaic and thermoelectric applications
- Collective electronic fluctuations and their influence on materials properties
- Re-using model results to determine materials properties:connector theory approach
- Structural, electronic and magnetic instabilities in two-dimensional complex oxides
- Spin-dependent charge dynamics in dilute nitride and defect-engineered semiconductor quantum structures and devices
- Electronic processes in nitride semiconductor quantum structures and devices
- Plasmonic Nanocrystals for Infrared Optics: Synthesis & Application
- Rare earth doped nanocrystals: Nano-sources of light for novel applications to medicine, energy harvesting, and quantum optics
- Theory of Many-Body Quantum States
- Theoretical study of the physical and optical properties of some metal oxide oxide surfaces for greenhouse gas sensing applications
- Probing the quantum properties of spin defects in 2D materials
- Uncovering a new law of physics in quantum materials
- First-principles theory of high-performance permanent magnets
- Quantitative Acousto-Magneto-Plasmonics
- Neutrino physics and astrophysics using neutrino observatories in Japan
- Physics at the infinitely large and the infinitely small scales of our Universe
- Study of the Higgs boson properties at the CERN LHC
- Studies of jet quenching in the quark-gluon plasma with the CMS experiment at the LHC
- From ordinary matter to deconfined matter using the Large Hadron Collider
As our world faces tremendous challenges related to environmental needs, energy, transport, information technologies, biotechnology or space engineering, physics provides both a means to address some of the most urgent societal issues and a marvelous intellectual challenge. Physics, in synergy with chemistry, materials science, biology, pure and applied mathematics, computer science, mechanical engineering or economics has been and will remain the driving force for technological progress. Thanks to its versatile methodologies it is moreover a key tool even for problems that are inherent to these neighboring disciplines. Last but not least, physics harbors some of the most mind-bugling scientific revolutions of the last century, such as quantum mechanics or relativity, providing us breathtaking insights into the structure of matter, the nature of light, the life of stars or the Big Bang. Modern research is both a consequence and a direct continuation of this intellectual adventure, continuing the quest for understanding the world around us.
The Institut Polytechnique de Paris with its world-class Research Center covering all fields of physics as well as its interfaces with chemistry, pure and applied mathematics, biology, mechanical engineering, computer science or economics provides a unique environment for students motivated by a PhD Track program.
This five-year PhD Track starts with a two-year period with advanced courses related to the chosen field of study. Students also participate in research projects carried out by Institut Polytechnique de Paris Laboratories involved in the track and attend research seminars. Supervised by faculty or senior researchers, they benefit from first-class research experience. At the end of the second year, the students who meet the academic requirements receive a Master Degree. Those who have achieved outstanding results and identified a thesis subject and a supervisor in one of the involved Labs are allowed to start a three-year PhD program.
Objectives
- Provide a coherent training program to students attracted by research, from theory and modeling to experimental physics and applications in various domains
- Acquire a high level knowledge of the scientific basis related to physics or plasma physics and to their applications
- Choose a specialization among a variety of fields related to theoretical and experimental condensed matter physics, mathematical physics, statistical physics, high-energy physics, biophysics, nanosciences, macroscopic physics and complex systems, lasers and optics, thermonuclear fusion, laser-produced plasmas, space plasmas and low-temperature plasmas, within the rich offer of IP Paris.
- Integrate into the world of research by spending time within the research Labs, conducting a research project under the supervision of a faculty member, writing a research report and preparing a first manuscript for publication in an international peer-reviewed journal.
The five-year curriculum of the PhD track trains students in cutting-edge research for them to pursue international careers in prestigious universities or leading companies in their domain.
The first two years of the PhD track are based on the Physics [1] Masters year 1 and year 2 at Institut Polytechnique de Paris. Every year, the program of every student has to be discussed and validated by his/her tutor, who is a member of the IP Paris faculty. According to the student’s specialization wishes, the course program will be individualized as much as possible.
The academic year of M1 physics is divided in three periods. During quarters 1 and 2 students will follow courses and participate to Research Projects in the laboratories of the Institut Polytechnique de Paris. During quarter 3 students will complete a research internship in one of the Institut Polytechnique de Paris laboratories or in an external institute (which could be in France or abroad).
Quarter 1
Students choose three core courses and one optional course among the ones that correspond to their major. Note that depending on the major, some core courses are mandatory. The optional course can be replaced by a Research Project in one of the Institut Polytechnique de Paris laboratories (to be defined on site).
Core courses
Mandatory Relativistic field theory |
5 ECTS English |
Astrophysics |
5 ECTS English |
Mandatory |
5 ECTS English |
Quantum optics I: Lasers |
5 ECTS English |
Quantum physics of electrons in solids |
5 ECTS English |
Elective courses
Numerical physics |
5 ECTS English |
Cosmology |
5 ECTS English |
Group theory |
5 ECTS English |
Core courses
Relativistic field theory |
5 ECTS English |
Astrophysics |
5 ECTS English |
Quantum optics I: Lasers |
5 ECTS English |
Quantum physics of electrons in solids |
5 ECTS English |
Atomic and molecular physics |
5 ECTS English |
Elective courses
Numerical physics |
5 ECTS English |
Cosmology |
5 ECTS English |
Material design |
5 ECTS English |
Core courses
Quantum optics I: Lasers |
5 ECTS English |
Quantum physics of electrons in solids |
5 ECTS English |
Physique des objets biologiques |
5 ECTS Français |
Surfaces molles |
5 ECTS Français |
Elective courses
Numerical physics |
5 ECTS English |
Material design |
5 ECTS English |
Core courses
Relativistic field theory |
5 ECTS English |
Quantum optics I: Lasers |
5 ECTS English |
Mandatory Quantum physics of electrons in solids |
5 ECTS English |
Atomic and molecular physics |
5 ECTS English |
Elective courses
Numerical physics |
5 ECTS English |
Group theory |
5 ECTS English |
Material design |
5 ECTS English |
Quarter 2
Students choose three core courses and one optional course among the ones that correspond to their major. Note that depending on the major, some core courses are mandatory. The optional course can be replaced by a Research Project in one of the Institut Polytechnique de Paris laboratories (to be defined on site).
Core courses
Mandatory Perturbative quantum field theory |
5 ECTS English |
Mandatory |
5 ECTS English |
General relativity |
5 ECTS English |
Elective courses
Experimental high energy physics |
5 ECTS English |
Black holes |
5 ECTS English |
General relativity |
5 ECTS English |
Core courses
Quantum optics II: photons |
5 ECTS English |
Optoelectronics |
5 ECTS English |
Thermonuclear fusion |
5 ECTS English |
Mesoscopic and topological matter |
5 ECTS English |
Elective courses
Experimental high energy physics |
5 ECTS English |
Black holes |
5 ECTS English |
Non-linear optics |
5 ECTS English |
Spintronic |
5 ECTS English |
Trends in material science |
5 ECTS English |
Physics of the environnement |
5 ECTS English |
Nuclear reactors |
5 ECTS English |
Quantum information |
5 ECTS English |
Core courses
Optoelectronics |
5 ECTS English |
Mesoscopic and topological matter |
5 ECTS English |
Nanomaterials |
5 ECTS Français |
Complex systems |
5 ECTS Français |
Polymers, membranes and cells |
5 ECTS Français |
Semiconductors |
5 ECTS Français |
Elective courses
Spintronic |
5 ECTS English |
Trends in material science |
5 ECTS English |
Quantum information |
5 ECTS English |
Core courses
Mandatory Quantum optics II: photons |
5 ECTS English |
Mesoscopic and topological matter |
5 ECTS English |
Semiconductors |
5 ECTS English |
Quantum informatics |
5 ECTS English |
Elective courses
Spintronic |
5 ECTS English |
Trends in material science |
5 ECTS English |
Quantum information |
5 ECTS English |
Quarter 3 - Internships
During the third quarter, students will follow one of the internships proposed by the program associated with the corresponding major. These internships of 4-6 months will take place at Institut Polytechnique de Paris or other institutions of excellence abroad. The internship is worth 20 ECTS
- Fields and particles
- Astrophysics and cosmology
Lasers, Quantum optics and Plasma
- Condensed Matter Physics
- Semiconducting devices
- Soft Matter, complex fluids and biomechanics
- Lasers, Quantum optics and Plasmas
- Condensed Matter Physics
- Semiconducting devices
- Quantum technologies and quantum materials
- Center for Theoretical Physics (CPHT)
- Photovoltaic Institute (IPVF)
- Leprince-Ringuet Laboratory (LLR)
- Laboratory for Applied Optics (LOA)
- Laboratory for Optics in Biology (LOB)
- Laboratory of Plasma Physics (LPP)
- Laboratory of High Intensity Lasers (LULI)
- Laboratory for Irradiated Solids (LSI)
- Laboratory for Condensed Matter Physics (PMC)
- Laboratory for Interfaces and Thin Films (PICM)
Partner laboratory
For updated information on current research projects and contact details of faculty members working in these areas, applicants are invited to check out the webpages of the laboratories as well as of the “Ecole Universitaire de Recherche” (EUR) in Plasma Science and Training (Plasma_ST).
Admission requirements
Academic prerequisites
Completion of a Bachelor in physics, with highest honors, at Institut Polytechnique de Paris or equivalent in France or abroad.
Evidence of research potential is essential as the main goal of such a PhD program is to train first class researchers.
Students who have completed the first year of an equivalent program may be directly admitted into the second year (4-year PhD program).
Language prerequisites
A certificate of proficiency in English (level B2) is required (TOEIC, IELTS, TOEFL, Cambridge ESOL), except for native speakers and students who previously studied in English.
How to apply
Applications are exclusively online. You will be required to provide the following documents:
- Transcript
- Two academic references (added online directly by your referees)
- CV/resume
- Statement of purpose indicating which 2 choices of research subjects among the one listed on this page under the section "PhD Track Research Projects"
You will receive an answer in your candidate space within 2 months following the closing date of the application session.
Fees and scholarships
Registration fees are available here
Find out more about scholarships
Please note that fees and scholarships may change for the following year.
Applications and admission dates
When applying to the PhD Tracks in Physics, you should describe your preferred fields of study and research in your motivation letter. You are ecouraged to choose two preferred PhD Track subjects among the list below. Since the posted offers do not cover the full spectrum of our activities, you can also visit the web pages of the 11 laboratories (CPHT, IPVF, LLR, LOA, LOB, LPICM, LPMC, LPP, LSI, LULI, Omega) affiliated to the physics department and indicate the research lines that interest you the most.
PhD Track research projects in "Physics"
- Guiding electric discharges in air using femtosecond laser filamentation
- Laser diagnostics of pulsed nanosecond plasma for biomedical application
- Ionization waves at a plasma-semiconductor interface
- H2 plasma for enabling phase-transformations during in-situ observations of the growth in the NanoMAX transmission electron microscope
- Turbulence in Fusion Plasma; Wave propagation in turbulent plasma in presence of sheared flow
- Collective plasma wave amplification for multiple laser beam configuration in the context of Laser MJ
- Intense attosecond light pulses from a relativistic plasma mirror
- Towards extreme beams and strong-field quantum electrodynamics experiments
- Coherent Beam Combining femtosecond digital laser
- Innovative concepts for particles plasma acceleration and radiation emission in laser
- Probabilistic and spectral insights onto diffusion-controlled reactions in chemistry and biology
- Structural imaging of healthy and pathological tissues using multiphoton microscopy
- Large-scale multiphoton microscopy of developing heart and brain tissue
- Understanding quadruplex formation by C-rich DNA sequences: the i-motif
- Corneal Transparency Diagnostics By Smart OCT and Deep Learning
- Novel Modeling of Coherent Multiphoton Microscopy Contrasts
- Mid-infrared femtosecond spectroscopy in proteins
- Early Detection and Identification of Diseased Human and Vegetal Tissues Using Visible / Infrared Polarimetric Microscopy Combined with Conventional and AI-based Image Analysis
- Mueller polarimetric imaging for biomedical diagnosis
- Modeling of polarized ligth interaction with the uterine cervix
- In vivo nonlinear optical microscopy of nervous tissue: lipid and metabolism imaging
- Correlated quantum matter and quantum information
- Ultrafast dynamics of electrons in quantum materials
- Theoretical study of electron-phonon coupling and of carrier dynamics in materials for potential photovoltaic and thermoelectric applications
- Collective electronic fluctuations and their influence on materials properties
- Re-using model results to determine materials properties:connector theory approach
- Structural, electronic and magnetic instabilities in two-dimensional complex oxides
- Spin-dependent charge dynamics in dilute nitride and defect-engineered semiconductor quantum structures and devices
- Electronic processes in nitride semiconductor quantum structures and devices
- Plasmonic Nanocrystals for Infrared Optics: Synthesis & Application
- Rare earth doped nanocrystals: Nano-sources of light for novel applications to medicine, energy harvesting, and quantum optics
- Theory of Many-Body Quantum States
- Theoretical study of the physical and optical properties of some metal oxide oxide surfaces for greenhouse gas sensing applications
- Probing the quantum properties of spin defects in 2D materials
- Uncovering a new law of physics in quantum materials
- First-principles theory of high-performance permanent magnets
- Quantitative Acousto-Magneto-Plasmonics
- Neutrino physics and astrophysics using neutrino observatories in Japan
- Physics at the infinitely large and the infinitely small scales of our Universe
- Study of the Higgs boson properties at the CERN LHC
- Studies of jet quenching in the quark-gluon plasma with the CMS experiment at the LHC
- From ordinary matter to deconfined matter using the Large Hadron Collider