Welcome to my homepage!
I am Sajal K. Giri, currently serving as a postdoctoral fellow in the research group of Prof. George C. Schatz.
Our research primarily focuses on the study of classical and quantum light-induced dynamical processes that take place in atoms, molecules, and nanoscale systems by developing theories and implementing computational methods.
A significant part of our research deals with the development of machine learning (ML) methods to model the dynamics and spectroscopic aspects of such light-induced processes.
The understanding of light-induced dynamics in molecules and nanoscale systems is often limited due to their inherent complexities. Are all these complexities essential that we take into consideration for solving the dynamics or provide enough transparency to gain insights? If there exists a subspace with minimal complexities encoding the essential dynamics then the problem is simplified significantly. But how do we explore that space if it exists at all? We combine quantum dynamics with machine learning methods to address this point.
Learn more!We explore quantum advantages in spectroscopic problems of molecules under full quantum description i.e., treating both system and light quantum mechanically. The main motivation behind this is whether we can go beyond the fundamental limits of conventional classical light spectroscopy and control the nonlinear optical processes. Further, we study formation polaritonic states through strong coupling between plasmons and molecules, and their effects on spectroscopy, transport, and photocatalysis. To this end, we develope theoretical methods to explore entangled light induced dynamics in molecules modeling the quantum state of light and their interactions with molecules.
Learn more!Nanomaterials exhibit efficient light absorption across a broad spectral range, largely attributed to localized surface plasmon resonance (LSPR). Within this research field, the central focus lies in understanding hot-carrier dynamics generated through the decay of LSPR and their role in potential applications for harnessing solar radiation. We develope theory and model to elucidate such complex dynamics, including plasmon-driven chemical reactions, surface-enhanced Raman scattering (SERS), and harmonic generation processes.
Learn more!A nontrivial geometric phase emerges in quantum transport dynamics as a consequence of external periodic drivings. We explore the effect of this phase in transport processes and importantly control them with external drivings through effective modeling of the dynamics.
Learn more!Author(s): F. M. Alcorn , S. K. Giri, M. Chattoraj , R. Nixon , G. C. Schatz, and P. K. Jain
Journal: Proc. Natl. Acad. Sci. (USA) (2024)
Author(s): H. Mandal*, S. K. Giri*, S. Jovanovski, O. Varnavski, M. Zagorska, R. Ganczarczyk, T.-M. Chiang, G. C. Schatz, and T. Goodson III
[* Equal Contribution]
Journal: J. Chem. Phys. 161, 044703 (2024)
Author(s): S. K. Giri, and G. C. Schatz
Journal: Modelling Simul. Mater. Sci. Eng. 32 063301 (2024)
Author(s): S. Baue, ..., S. K. Giri , ..., and M. Scheffler
Journal: arXiv:2402.13478 (2024)
Author(s): S. K. Giri , and G. C. Schatz
Journal: Proc. Natl. Acad. Sci. (USA) 120, e2307719120 (2023)
Author(s): O. Varnavski, S. K. Giri , T. Chiang, C. J. Zeman IV, G. C. Schatz, and T. Goodson III
Journal: J. Phys. Chem. C 127, 4115 (2023)
Author(s): S. K. Giri , and G. C. Schatz
Journal: J. Phys. Chem. Lett. 13, 10140 (2022)
Author(s): S. K. Giri , and G. C. Schatz
Journal: Phys. Rev. E 106, 024131 (2022)
Author(s): S. K. Giri , and H. P. Goswami
Journal: Faraday Discuss. 228, 502 (2021)
Author(s): S. K. Giri , L. Alonso, U. Saalmann, and J. M. Rost
DOIJournal: Phys. Rev. Lett. 124, 113201 (2020)
Author(s): S. K. Giri , U. Saalmann, and J. M. Rost
DOIJournal: Phys. Rev. E 99, 022104 (2019)
Author(s): S. K. Giri , and H. P. Goswami
DOIJournal: Phys. Rev. Lett. 121, 153203 (2018)
Author(s): U. Saalmann, S. K. Giri and J. M. Rost
DOIJournal: Phys. Rev. E 96, 052129 (2017)
Author(s): S. K. Giri , and H. P. Goswami
DOIJournal: J. Mod. Opt. 64, 1004 (2017)
Author(s): S. K. Giri , U. Saalmann, and J. M. Rost
DOI