Appointment of Prof. Dhananjay Nandi as the Head of the Department
#News
#Announcement
Posted on: September 7th, 2024
Observing a Century of Quantum Mechanics
A hundred years of the development of quantum mechanics is approaching. As we know, speedy developments happened from 1924 to 1927. Even though we are approaching a century of its existence, many problems relating to the foundations of quantum mechanics remain unsolved.
The Department of Physical Sciences of IISER Kolkata is organizing an international conference focused on the foundational problems of quantum mechanics. The timing is meant to commemorate Prof Satyendra Nath Bose’s momentous contribution in 1924.
Venue: Indian Institute of Science Education & Research Kolkata
Dates: 18-21 December 2024
#Conference
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#News
Posted on: September 2nd, 2024
Probing Shallow and Deep Oxygen Traps in Binary Transition Metal Oxide, CoV2O6, Using Ultrafast Pump Probe Spectroscopy
Authors: Anjan Kumar N M, Soumya Mukherjee, Souvick Chakraborty, Ayan Mondal, Debabrata Samanta, Goutam Dev Mukherjee, Venkataramanan Mahalingam, Satyabrata Raj, N. Kamaraju.
Journal: The Journal of Physical Chemistry C (https://pubs.acs.org/doi/epdf/10.1021/acs.jpcc.4c02975)
Transition metal oxides, while promising for optoelectronics, often suffer from performance limitations due to carrier trapping defects. Understanding and mitigating these traps is crucial for enhancing device efficiency.
This study focuses on CoV2O6, a transition metal oxide with unique optical and magnetic properties. Using femtosecond pump-probe spectroscopy, we investigated the ultrafast optical dynamics of CoV2O6 microparticles. Our analysis revealed two distinct types of traps: shallow band-edge states and deeper mid-gap states. These traps were identified through steady-state absorption and photoluminescence measurements, supported by first-principles DFT calculations.
Kinetic modelling of the transient absorption data further confirmed the existence of these traps and their role in capturing photoexcited carriers. We found that shallow traps capture carriers within approximately 2 picoseconds, while deep traps capture them within 30 picoseconds. Our model predicts that approximately 44 % of photoexcited carriers are trapped in shallow traps, and 40 % in deep traps.
This research provides valuable insights into the carrier dynamics and trapping mechanisms in CoV2O6, paving the way for strategies to improve its optoelectronic performance.
The article is now online: https://pubs.acs.org/doi/epdf/10.1021/acs.jpcc.4c02975
#News
Posted on: September 2nd, 2024
Undergrad vision: Young physicists' symposium
Time: 2:00 PM IST
Venue: Asima Chatterjee Lecture Theatre, 2nd Floor, RC
This unique initiative by Gluon offers the younger members of DPS, along with other BS-MS students, a platform to share their insights with peers. In our opening session, six speakers will present their ideas on various fields, ranging from astrophysics to condensed matter physics.
Speakers:
1. Archis Mukhopadhyay: Looking for magnetized jellyfish in a toy Universe
Abstract: Large scale cosmological hydrodynamical simulations can provide us with a wide range of information about galaxies, galaxy clusters, and the multiphase gas in and around galaxies. They provide us with large samples of galaxies in realistic environments, and allow us to infer information about galaxies at a population level. In this talk, I will give a brief introduction to IllustrisTNG, how large simulation data is handled, and the preliminary results from my analysis.
2. Bhaskar Barman: Hot electron relaxation in Metals
Abstract: In this talk we will review of the phenomena related to non-equilibrium electron relaxation in metals using two temp. model .Considering the Boltzmann-Bloch-Peierls (BBP) kinetic equation ,we will find the net phonon generation rate and derive the average energy transfer relation between electron and phonon in low and high temperature limit .
3. Sabarinath M D: Mapping the moon
Abstract: The talk will cover the procedures involved in element mapping on Lunar Surface, using the data of Chandrayaan 2 CLASS payload. I shall also tell about the practical difficulties and some unique findings on the moon surface during the internship. I will provide some interesting methodologies employed and some great features of the X ray range emissions of the moon.
4.Rohan Kumar: Developing a flare detection pipeline to characterize the flare frequency distribution around low mass stars
Abstract: In this talk , I am going to discuss my work related to developing a stellar flare detection pipeline in Python. It has been tested it on optical light curve data from NASA\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'s Transiting Exoplanet Surveyed Satellite. Our pipeline can be broken down into two steps; first, we detrend the light curve to remove the long-term variation or quasi-periodic stellar rotation from the light curve; second, we search for the flares in the detrended light curve. The flare search is performed by classifying significant contiguous outliers, which makes the detection entirely data-driven.We performed injection-recovery tests to tune the flare search parameters to maximize the detection efficiency while keeping the false positive rate low. Our injection recovery test clearly shows the importance of higher cadence observations and the optimal flare search parameters. Our pipeline will ultimately be used to generate flare frequency distribution for mid-to-late M dwarfs.
5.R.Pradeep: Quantum Communication methods for secure communication: Quantum key distribution, Quantum secret sharing and Quantum dialogue protocols.
Abstract: Secure communication between parties can be done using the quantum properties like superposition and entanglement. If security is based on one way computable functions like prime factorisation , it could bee broken through quantum algorithms like Shors algorithm. If we design our security based on laws of quantum mechanics then it would be unconditionally secure and some of the few standard methods will be discussed in this talk.
6.Sanghamitra Basu: Exploring stress and strain in doped β-Ga2O3 crystals.
Abstract:Powder X-ray diffraction studies were conducted on undoped β-Ga2O3 crystals and nine samples doped with various 3d transition metals, starting from Scandium. Our comparative analysis focused on the chemical pressure induced within the lattice by the different dopants used such as strain and twist. Experimental data was fitted using the FullProf Suite, employing the Profile Matching with Constant Scale Factor method to extract precise lattice parameters. Additionally, the Modified-Williamson Hall plot was utilized to investigate the variations in mechanical microstrain along different crystallographic directions and across the doped samples. We additionally annealed 2 samples (undoped and V-doped) to see the changes in microstrain using the same Modified Williamson-Hall method. This comprehensive study provides new insights into the structural and mechanical impacts of transition metal doping in β-Ga2O3 crystals.
#Events
Posted on: August 23rd, 2024
Dr. Raghunath Ghara joins as a Ramanujan Fellow
#Announcement
#News
Posted on: July 12th, 2024
Convocation 2024
#News
Posted on: June 22nd, 2024
Director's Gold Medals
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#Achievement
Posted on: June 22nd, 2024
Chairman's Medal of Excellence
#News
#Achievement
Posted on: June 22nd, 2024
Dr. Prantika Bhowmik joins IISc as an Assistant Professor
It is a matter of immense pride to us that our alumni, Dr. Prantika Bhowmik, PhD student of Prof. Dibyendu Nandi, has joined the Physics Department of the Indian Institute of Science, Bengaluru, as a faculty member.
Prantika was a first batch PhD student at the Centre of Excellence in Space Sciences, India (CESSI), joining the program in 2013. Her thesis focused on the development of computation models for forecasting the Sun\'s magnetic cycle. She received the Justice Oak Best Thesis Award from the Astronomical Society of India and the PhD at Large prize of the International Astronomical Union for her thesis work. Subsequently, she moved to the Solar Group at the Department of Mathematics at Durham University as a Postdoc. Finally, she joined IISc as an Assistant Professor this month.
#Achievement
#News
Posted on: June 7th, 2024
Anand Dev Ranjan awarded an SPIE Optics and Photonics Scholarship
Anand Dev Ranjan has been awarded a 2024 Optics and Photonics Scholarship by SPIE, the International Society for optics and photonics, for potential contributions to optics, photonics, or a related field.
Dev Ranjan is currently working with Professor Ayan Banerjee in the Department of Physical Sciences at the Indian Institute of Science Education and Research Kolkata (India). He focuses on two significant challenges in today’s world: The growing demand for faster and more cost-effective biosensors, supplemented by a need for more congenial fabrication strategies. “My work focuses on microbubble lithography - a technique for developing microscopic patterns of diverse materials using microbubbles created by a high-intensity laser spot inside optical tweezers,” noted Dev Ranjan. “These microbubbles can cause dispersed materials to self-assemble, resulting in the formation of continuous patterns.” Dev Ranjan is harnessing this technique to develop a multi-disease diagnostic platform. “I am pursuing research with a motivation to serve both science and society,” said Dev Ranjan. “Thank you, SPIE, for appreciating my work. I am especially grateful to my family, friends, professors, and Krushna.”
This month, the Society is awarding $303,000 in scholarships to 72 outstanding SPIE Student Members, based on their potential contribution to optics and photonics, or a related discipline. Successful applicants were evaluated, selected, and approved by the SPIE Scholarship Committee, chaired by SPIE Senior Member Brian Primeau.
#Achievement
#News
Posted on: May 28th, 2024
Jeeban Kumar Nayak awarded an SPIE Optics and Photonics Scholarship
Jeeban Kumar Nayak has been awarded a 2024 Optics and Photonics Scholarship by SPIE, the international society for optics and photonics, for potential contributions to optics, photonics, or a related field.
Nayak is a Senior Research Fellow in the Bio-Optics and Nanophotonics Lab at the Indian Institute of Science Education and Research Kolkata (India), specializing in optics and photonics. “My primary research interest is investigating spin-orbit interactions of light in nanostructures,” said Nayak. “Additionally, I am working on developing various microscopy and sensing technologies with potential applications in biomedical research, chemical sciences, and metrology. The Optics and Photonics Scholarship from SPIE will greatly enhance my enthusiasm for pursuing a career in photonics and provide significant support for my future endeavors.”
This month, the Society is awarding $303,000 in scholarships to 72 outstanding SPIE Student Members, based on their potential contribution to optics and photonics, or a related discipline. Successful applicants were evaluated, selected, and approved by the SPIE Scholarship Committee, chaired by SPIE Senior Member Brian Primeau.
#Achievement
#News
Posted on: May 28th, 2024
Visit from OUAT, Bhubaneswar
#Outreach
#News
Posted on: March 6th, 2024
Ph.D. programme for the Autumn of 2024
IISER Kolkata invites applications from motivated students for admission to the Doctor of Philosophy (Ph.D.) programme for the Autumn of 2024. The selected candidates can do a Ph.D. in any of the following disciplines: Biological Sciences, Chemical Sciences, Computational and Data Sciences, Earth Sciences, Humanities and Social Sciences, Mathematics and Statistics, Physical Sciences, and Space Sciences.
● PhD application portal opens: 01.03.2024
● Application portal closes: 30.04.2024
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#News
Posted on: March 1st, 2024
Niladri Modak received the Best Thesis Award at NPC 2024
#Achievement
#News
Posted on: February 10th, 2024
Best Paper Award for Jeeban Kumar Nayak
#Achievement
#News
Posted on: February 10th, 2024
Research Meet: 2024
#Events
#News
Posted on: February 5th, 2024
Prof. Ayan Banerjee is the new DoSA!
#News
#Achievement
Posted on: February 5th, 2024
Prof. Rangeet Bhattacharyya is the new DoAA!
#News
#Achievement
Posted on: February 5th, 2024
Prof. Dibyendu Nandi received the Peraiah Foundation Lectureship Award
#Achievement
#News
Posted on: January 8th, 2024
Prof. Prasanta K. Panigrahi leads the building of a Center of Quantum computing.
#News
#Achievement
Posted on: January 3rd, 2024
Prof. Soumitra Banerjee: Director of IISER Kolkata.
#News
#Achievement
Posted on: December 20th, 2023
Sakshi Gupta joined Defence Research and Development Organization (DRDO) as a scientist!
#Achievement
#News
Posted on: December 12th, 2023
Yoshita Baruah was awarded a SCOSTEP Visiting Scholarship at NASA Goddard Space Flight Center
#Achievement
#News
Posted on: December 12th, 2023
Faculty Positions Available! Application Deadline: 10 December, 2023
The Department of Physical Sciences at the Indian Institute of Science Education and Research Kolkata seeks applications from eligible candidates for appointment as faculty at all levels, although preference would be given to recruitment at the Assistant Professor level. Note that this is a fresh call for applications in priority areas, and it is preferred that any past applicants who fit into these areas (given below), apply to this specific call by the deadline.
The Department’s research portfolio encompasses almost all major areas of physics, exploring ideas and phenomena that encompass several orders of magnitude not only in terms of length but also in energy and time. The topics currently covered include condensed matter physics and material science, biophysics, soft matter physics, complex systems, light-matter interaction, astrophysics, space science, gravitation and cosmology, high energy physics, atomic and molecular physics, non-linear dynamics, quantum information processing, quantum computation, and mathematical physics. The experimental endeavours are well supported by several high-end instruments and facilities such as Micro-Raman Spectroscopy, SQUID (Superconducting Quantum Interference Device), custom-designed velocity map Imaging Spectrometry, ultra-fast spectroscopy (including a Femtosecond laser oscillator and amplifier), Atomic Force Microscopy, and many others. Some of our experimentalists have also developed state-of-the-art apparatus which include optical tweezers and photonic force spectroscopy, dark field fluorescence Mueller Matrix polarization spectroscopy, and low-temperature electron spin resonance (ESR) towards quantum computation. Additionally, DPS faculty have also contributed to the creation of two Centres of Excellence supported by generous extramural funding from various Ministries of the Government of India: the Centre of Excellence in Space Sciences, India (CESSI), and the National Centre for High-Pressure Studies (NCHPS). DPS has recently also inducted a high-performance computational facility for its members.
Through this specific recruitment drive we are seeking to appoint a few faculty members in the following priority areas to enhance and complement our activities. Applicants must add one of the following areas in the 'Research Area' field in the application form.
1. Experimental Condensed Matter Physics 2. Experimental High Energy Physics 3. Experimental Soft Matter Physics 4. Observational Astronomy 5. Experimental Optics and Spectroscopy
Prospective faculty applicants from other areas can apply through the rolling advertisement.
Application Deadline: 10 December, 2023
https://apply.iiserkol.ac.in/faculty/
We particularly encourage applications from under-represented groups. For eligibility criteria and other requirements, standard MoE norms will be followed. The Government of India's policy regarding reservations will be adhered to during recruitment at all levels.
#Announcement
#News
Posted on: November 18th, 2023
Physical Reviwew Letter publication by Mr. Adway Kumar Das and Dr. Anandamohan Ghosh. Congratulations!
Joint research of bioNap & Light Matter Lab is in the cover page of Physical Review Letters!
#News
#Achievement
Posted on: November 13th, 2023
IISER Kolkata wins GOLD in iGEM 2023!
#Achievement
#News
Posted on: November 7th, 2023
𝗦𝗵𝗼𝗼𝘁 𝗳𝗼𝗿 𝘁𝗵𝗲 𝗦𝗨𝗡!
#News
#Achievement
Posted on: September 9th, 2023
Welcome to the new Ph.D. batch
#News
Posted on: August 18th, 2023
'UNIVERSE' written by our postdoctoral fellow Dr. P. C. Lalremruati!
#News
#Achievement
Posted on: August 10th, 2023
𝐁𝐞𝐬𝐭 𝐓𝐡𝐞𝐬𝐢𝐬 𝐀𝐰𝐚𝐫𝐝 for Niladri Modak
Niladri Modak, IPhD student of the Department of Physical Sciences (DPS) and working in the bio-optics & Nanophotonics (bioNap) laboratory, has received the best thesis award in the 15th PHOTONICS conference organized at IISc, Bengaluru during 5-8 July 2023.
The biennial international conference PHOTONICS is a premier conference in the emerging areas of Photonic science and technologies and Optical Physics. Niladri’s PhD thesis entitled, “Weak Measurements in Spin-Orbit Optical Systems: Fundamental Consequences and Application Prospects” has been selected for the best thesis award in the Doctoral Symposium of PHOTONICS 2023. Congratulations Niladri!
#Achievement
#News
Posted on: July 14th, 2023
Director’s Gold Medal and Chairman’s Gold Medal for Suprabha Mukhopadhyay.
#Achievement
#News
Posted on: June 29th, 2023
Fazal Kareem, a DPS undergraduate student, is a part of the collaboration of the gravitational wave discovery.
#Achievement
#News
Posted on: June 29th, 2023
10th Convocation of IISER Kolkata
DPS student involved in 12 exoplanets hunt using statistical tools
Surendra Bhattarai (19MS136) and his team worked on exoplanets detection using Statistical tools like TRICERATOPS, VESPA, and other methods (lightcurve, and radial velocity) since last year, and the paper got published in Monthly Notices of the Royal Astronomical Society (MNRAS): "VaTEST I: Validation of Sub-Saturn Exoplanet TOI-181b in Narrow Orbit from its Host Star". Many many congratulations.
MNRAS DOI: https://doi.org/10.1093/mnras/stad543 arxiv: https://arxiv.org/abs/2211.07957 After their first successful attempt, they expanded the study and validated 11 more new exoplanets. And this can be also be found on our 2nd paper: "VaTEST II: Statistical Validation of 11 TESS-Detected Exoplanets Orbiting K-type Stars" https://arxiv.org/abs/2301.09865 , which is published a few days ago in the Astronomical Journal (AJ).
And this work got highlighted in Times Of India press release:
#Achievement
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Posted on: June 8th, 2023
Adway Kumar Das received Fulbright Nehru Doctoral Research Fellowship.
#Achievement
#News
Posted on: May 23rd, 2023
ADG receives INSA Teachers Award!
Dr. Arnab Chakrabarti becomes an Assistant Professor!
#Achievement
#News
Posted on: May 5th, 2023
Soumya Mukherjee wins the best poster prize!
Dr. Debdatta Ray is awarded the INSPIRE Faculty Fellowship
#Achievement
#News
Posted on: April 13th, 2023
Nilanjana Chanda wins the Best Paper Presentation award
#Achievement
#News
Posted on: February 16th, 2023
DPS hosted Yuval Gefen as an Institute Colloquium Speaker
#Events
#News
Posted on: January 17th, 2023
IISER Kolkata is the winner of IICM 2022
#Achievement
#News
#News
Posted on: January 2nd, 2023
Raj takes charge of Dean, Research and Development
#Achievement
#News
Posted on: December 18th, 2022
Qauntum Hamilton-Jacobi Formalism
PMRF @ DPS
#Achievement
#News
Posted on: October 26th, 2022
Dr. Sayan Choudhury from DPS joins Harish-Chandra Research Institute
#Achievement
#News
Posted on: October 14th, 2022
Prof. Prasanta K. Panigrahi assumes the charge of Director, IISER Kolkata
#News
#Achievement
Posted on: October 13th, 2022
ICTP Associate
#Achievement
#News
Posted on: September 7th, 2022
CONVERGENCE
#Announcement
#News
Posted on: September 5th, 2022
Rumi as a Women in STEM: Vanguards of lndia@75
#Achievement
#News
Posted on: July 25th, 2022
Congratulation
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#Events
Posted on: July 14th, 2022