Somnath Biswas @SBiswas_Chem Twitter profile

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Somnath Biswas

17 days

I am excited to share that I will be joining the Department of Chemical Sciences at TIFR, Mumbai, as a tenure-track faculty member (Reader/Assistant Professor) in Spring 2025.

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Somnath Biswas

@SBiswas_Chem

4 months

Thrilled to share our work published in @NatureMaterials . Here, we show how controlling exciton-phonon interactions drives exciton-polaron formation and subsequent carrier cooling in rigid DJ-type 2D perovskites at room temperature.

Exciton polaron formation and hot-carrier relaxation in rigid Dion–Jacobson-type two-dimensional...

Nature Materials - The detailed interplay between electronic and lattice dynamics in two-dimensional perovskite materials remains elusive. Here the authors establish the room-temperature polaronic...

www.nature.com

Princeton Chemistry

@PrincetonChem

4 months

Congratulations Scholes Group and collaborators publishing today in @NatureMaterials : "Exciton polaron formation and hot-carrier relaxation in rigid Dion–Jacobson-type 2D perovskites." Well done Somnath, Greg et al. Full paper here:

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Somnath Biswas

@SBiswas_Chem

6 months

Element- and oxidation state-specific near-ambient pressure X-ray photoelectron spectroscopy reveals important roles of the chemical environment and solvation on underlying charge and spin transitions in molecular clusters. @J_A_C_S @osuchemistry

Water-Mediated Charge Transfer and Electron Localization in a Co3Fe2 Cyanide-Bridged Trigonal...

The effects of temperature and chemical environment on a pentanuclear cyanide-bridged, trigonal bipyramidal molecular paramagnet have been investigated. Using element- and oxidation state-specific...

pubs.acs.org

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Somnath Biswas

@SBiswas_Chem

1 year

Could not be happier as an ultrafast spectroscopist. Congratulations Pierre from @OSUPhysics . Cheers for electron!

The Nobel Prize

@NobelPrize

1 year

BREAKING NEWS The Royal Swedish Academy of Sciences has decided to award the 2023 #NobelPrize in Physics to Pierre Agostini, Ferenc Krausz and Anne L’Huillier “for experimental methods that generate attosecond pulses of light for the study of electron dynamics in matter.”

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Somnath Biswas

@SBiswas_Chem

2 years

Observing and manipulating photoinduced band renormalization effects using a tabletop ultrafast setup and out-of-equilibrium formalism. A wonderful collaboration with Gregory D. Scholes, Ioannis Petrides, @NarangLab @SchoopLab @PrincetonChem Schoop.

Photoinduced band renormalization effects in the topological nodal-line semimetal ZrSiS

Out-of-equilibrium effects provide an elegant pathway for probing and understanding the underlying physics of topological materials. In particular, controlling electronic band structure properties...

journals.aps.org

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Somnath Biswas

@SBiswas_Chem

2 months

Had a great time visiting the Pacific Northwest National Lab ( @PNNLab ) and learning about the research happening in the Physical Sciences Division at the Energy Sciences Center. Thanks to Dr. Niri Govind ( @NiriGovind ) for the seminar invitation and for being a wonderful host.

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Somnath Biswas

@SBiswas_Chem

5 months

Had a wonderful experience performing time -resolved X-ray experiments at LCLS, SLAC, XCS Beamline! #XrayScience , #LCLS #SLAC

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Somnath Biswas

@SBiswas_Chem

3 years

Recent progress of ultrafast XUV-RA spectroscopy to observe dynamics at surfaces by probing state-specific core-to-valence transitions. @ACSPublications

Extreme Ultraviolet Reflection–Absorption Spectroscopy: Probing Dynamics at Surfaces from a...

ConspectusExtreme ultraviolet light sources based on high harmonic generation are enabling the development of novel spectroscopic methods to help advance the frontiers of ultrafast science and...

pubs.acs.org

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Somnath Biswas

@SBiswas_Chem

5 years

Looking forward to present my research at the Lindau Nobel Laureate Meeting @lindaunobel . #LiNO19

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Somnath Biswas

@SBiswas_Chem

17 days

This understanding underpins the advances in current and future generations of energy harvesting, information storage and processing, and quantum technologies. Thanks to my mentors, collaborators, evaluators, family, and friends for their support!

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Somnath Biswas

@SBiswas_Chem

17 days

Our group will develop and employ novel ultrafast spectroscopic techniques (Optical, and XUV/X-ray based) to reveal principles behind efficient transport and interconversion of energy between electron, spin, and nuclear degrees of freedom in functional materials.

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Somnath Biswas

@SBiswas_Chem

16 days

@jd1278 @TIFRScience Thanks JD! Looking forward as well.

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Somnath Biswas

@SBiswas_Chem

5 years

@Mann_CharlieRay @lindaunobel @LChiappisi Spectroscopist, trying to understand the solar energy conversion through X-ray spectroscopy. Hoping to improve the efficiency of next generation solar materials.

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Somnath Biswas

@SBiswas_Chem

4 months

3. We demonstrate that exciton-phonon interaction can be controlled via targeted ligand design to manipulate the exciton-polaron population, carrier cooling, and phonon bottleneck formation.

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Somnath Biswas

@SBiswas_Chem

4 years

@TomojitC @zoom_us @OhioState @PrincetonChem Thanks for joining!

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Somnath Biswas

@SBiswas_Chem

4 months

@jd1278 Thanks JD!

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Somnath Biswas

@SBiswas_Chem

3 months

@jd1278 @NatureMaterials @TIFRScience Congratulations to the team. Beautiful results!

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Somnath Biswas

@SBiswas_Chem

4 months

2. Special displacement method shows that low-frequency phonon modes between 20-80 cm⁻¹ renormalize the excitonic transition energy. In this picture, the lattice reorganization energy (polaron stabilization energy) closely parallels solvent reorganization energies in solution.

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Somnath Biswas

@SBiswas_Chem

4 months

1. Observation of the impulsive generation of low-frequency (20-80 cm⁻¹/0.6-2.4 THz) and highly polarizable phonons forming a molecular-like nuclear wavepacket, reorganizing and stabilizing the lattice via local distortion, establishes the formation of exciton-polaron.

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