Author

Prasanta Kumar Datta

3 papers indexed here

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Oct 2026

Selective Ultrafast Excitation and Dephasing of Gap Plasmons into Hot Carriers in Structural Color Generation.

Plasmon-induced hot-carriers generated through Landau damping underpin applications in plasmonic optoelectronics, energy conversion, and photocatalysis. However, it remains unclear whether these carriers retain the spatial localization of their parent plasmon modes or rapidly lose this spatial memory through ultrafast...

M. Karmakar, A. Karmakar, Aritra Biswas et al. · ACS Nano · 0 citations

Open access Aug 2026

Chirality Unlocks Sub-Terahertz Molecular Dynamics In Peptide Nanotubes.

Low-frequency modes in the picosecond range play a key role in molecular recognition and biomolecular function. Here, we investigate how these dynamics at the interfaces of self-assembled peptide biomaterials relate to fine structural details of the supramolecular assembly. We resolve terahertz and mid-infrared modes i...

Rajat Kumar, Erica Scarel, A. Perucchi et al. · Small · 0 citations

Sep 2026

Mixed Triple-Cation Tin and Lead Bromide Perovskites: Bridging Atomic Structure, Lattice Dynamics, and Stability

Tin-based halide perovskites are promising lead-free alternatives for optoelectronic applications, yet their practical implementation is limited by the facile oxidation of Sn(II) to Sn(IV), which compromises environmental stability. Inspired by the success of triple-cation engineering in Pb-based perovskites, we expl...

K. Das, Diganta Sarkar, Jayanta Kumar Sarkar et al. · ACS Applied Energy Materials · 0 citations