Associate Professor
Department of Chemical Sciences
📍 1F-11/AB-1
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Research Area
Ultrafast spectroscopy and optical trapping
Research Interests
The central theme of research in the “Condensed Phase Dynamics” group at IISER Mohali led by Dr. Arijit K. De is to explore, through a combination of experiments and theories, a multitude of multidisciplinary problems spanning chemistry, biophysics, and condensed matter physics.
The main focus of the group is to investigate energy and charge (electron/hole or proton) transfer dynamics, covering a wide range of timescales (few tens of femtoseconds to few tens of nanoseconds), within systems of varying complexities (namely, organic chromophores and their aggregates/multichromophoric systems, transition metal complexes, halide perovskites and fluorescent proteins) and the effect of the local environment (for example, solvation and nanoscale confinement) on it. To study these problems, the group developed a couple of cutting-edge spectroscopic techniques, beyond widely-used and commercially available femtosecond pump-probe (or transient absorption) spectroscopy, i.e., ‘two-dimensional electronic spectroscopy’ and ‘(time-resolved) impulsive Raman spectroscopy’, each of which is first of its kind developed in India.
The group also pioneered in deciphering the role of optical and thermal nonlinearities in laser trapping under femtosecond pulsed excitation. Quite recently, they developed a ‘laser beam-shaping (with computer-generated holograms)’ apparatus to study effect of orbital angular momentum in laser trapping and interactions between active/passive colloidal particles.
Since 2020 : Associate Professor, IISER Mohali
2014 - 2020 : Assistant Professor, IISER Mohali
Since 2022 : Life Member (LM 3229), The Chemical Research Society of India (CRSI)
Since 2008 : Life Member (L13984), Indian Science Congress Association (ISCA)
2010 - 2014 : Postdoctoral Fellow, Lawrence Berkeley National Laboratory/University of California Berkeley
2005 - 2010 : PhD, Indian Institute of Technology Kanpur
2003 - 2005 : MSc, Indian Institute of Technology Kanpur
1999 - 2003 : BSc (in Chemistry (Honours), Physics and Mathematics), Ramakrishna Mission Residential College, Narendrapur/University of Calcutta
Presider of Session on "Topology and 2D materials" at the International Conference on Ultrafast Phenomena-2024; Barcelona, Spain; 15-19 July, 2024
International Travel Support, SERB (DST), India: 12/10/2023 (File No. ITS/2023/002570)
Presider of Session on "Dynamics of Complex Systems" at the International Conference on Ultrafast Phenomena-2022; Montréal Quebec, Canada; 18-22 July, 2022
International Travel Support, INSA, India: 06/06/202(No. SS/INSA/2022/60)
International Travel Support, SERB (DST), India: 05/07/2017 (Application No. ITS/Off-502/2017-18)
International Travel Support, INSA, India: 04/07/201(No. SS/INSA/2017/758)
Early Career Research (ECR) Award, SERB, DST, India: 31/05/2016 (Award No. ECR/2016/000467)
Chemist Postdoctoral Fellowship, Physical Biosciences Division, Lawrence Berkeley National Laboratory, CA, USA: 2010-2014
Best Student Poster, SPIE Photonics West 2010, San Francisco, CA, USA: 2010
Foreign Travel Grant, CSIR, India: 19/06/2009 (Ref. No: TG/4148/09-HRD)
Best Poster Award, SPIE Photonics West 2009, San Jose, CA, USA: 29/01/2009
Photonics 2004 Endowment Prize, Photonics 2008, New Delhi, India: 17/12/2008
International Travel Support, SERB (DST), India: 04/08/2008 (File No.: SR/ITS/01459/2008-2009)
Foreign Travel Grant, CSIR, India: 02/07/2008 (Ref. No: TG/3321/08-HRD)
Foreign Travel Grant, CSIR, India: 24/08/2007 (No. TG/2747/07-HRD)
CSIR Senior Research Fellowship (SRF), India: 2007-2010
CSIR Junior Research Fellowship (JRF) (secured among the top 20% awardees in National Eligibility Test (NET)), India: 2005-2007
Graduate Aptitude Test in Engineering (GATE) (All India Rank: 237), India: 2005
Merit-Cum-Means (MCM) Scholarship (3rd & 4th semester in MSc) IIT Kanpur, India: 2004-2005
Summer Research Fellowships, SRFP, JNCASR, Bangalore, India: 2004
National Scholarship for BSc in Chemistry (Rank: 53), India: 14/09/2007
Jagadish Bose National Science Talent Search award, JBNSTS, Kolkata, India: 19/12/2000
National Scholarship for 10th grade exam 1997 (Rank: 69) WBBSE, WB, India: 24/04/2000
Rupam Roy, Sakshi Chawla, Vikas Sharma, Arun K Pal, Yogita Silori, Ayan Datta, Arijit Kumar De and Apurba Lal Koner. Ultrafast Symmetry-Breaking Charge Separation in Perylenemonoimide-embedded Multichromophores: Impact of Regioisomerism. Chemical Science, 2024.
Garima Bhutani, Pratima Verma, Ajay Jayachandran, Sasthi Paul, Kausik Chattopadhyay and Arijit K De. Unveiling the Role of Hidden Isomers in Large Stokes Shift in mKeima: Harnessing pH-Sensitive Dual-Emission in Bioimaging. The Journal of Physical Chemistry B 127(14):3197–3207, 2023.
Samita Mishra, Shradha Sapru, Shrish Nath Upadhyay, Ashok Singh, Srimanta Pakhira and Arijit K De. Elucidating the Structure–Property Relationship and Ultrafast Exciton/Charge Carrier Dynamics of Layered Cs4CuSb2Cl12 Double-Perovskite Microcrystals. The Journal of Physical Chemistry C 127(4):1881–1890, 2023.
Yogita Silori, Sakshi Chawla, Anita Yadav and Arijit K De. Effect of nanoscale confinement on ultrafast dynamics of singlet fission in TIPS-pentacene. ChemPhysChem 4:2979–2987, 2022.
Shaina Dhamija, Garima Bhutani, Ajay Jayachandran and Arijit K De. A Revisit on Impulsive Stimulated Raman Spectroscopy: Importance of Spectral Dispersion of Chirped Broadband Probe. The Journal of Physical Chemistry A, 2022.
Anita Devi and Arijit K De. Unified treatment of nonlinear optical force in laser trapping of dielectric particles of varying sizes. Physical Review Research 3:033074–1, 2021.
Anita Devi, Sumit Yadav and Arijit K De. Dynamics of a dielectric microsphere inside a nonlinear laser trap. Applied Physics Letters 117:161102, 2020.
Yogita Silori, Pankaj Seliya and Arijit K De. Ultrafast Excited State Dynamics of Tricarbocyanine Dyes Probed by Two-Dimensional Electronic Spectroscopy: Polar Solvation vs Photoisomerization. Journal of Physical Chemistry B, 2020.
Yogita Silori, Sakshi Chawla and Arijit K De. Unravelling the role of water in ultrafast excited-state relaxation dynamics within nano-architectures of Chlorophyll a. ChemPhysChem, 2020.
Anita Devi and Arijit K De. Theoretical investigation on nonlinear optical effects in laser trapping of dielectric nanoparticles with ultrafast pulsed excitation. Optics Express 24(9):21485–21496, 2016.