5 papers
Extreme Polarization of the Optical Gap and High-Energy Exciton Landscape in CrSBr
Sayantan Patra, Sourabh Jain, Bhumika Chauhan +8
We reveal a strongly anisotropic excitonic landscape in monolayer and bulk-like CrSBr using optical absorption spectroscopy and -Bethe-Salpeter equation ca…
Phonon-modulated Kerr nonlinearity in ultrathin 2H-MoTe2
Shaoxiang Sheng, Yang Luo, Chenyu Wang +8
Controlling nonequilibrium responses in optically driven quantum materials is essential for advancing applications in energy conversion, ultrafast electronics, and quantum computat…
Exciton-Selective Phonon Coupling in a Lead Halide Perovskite
Pradeepa H. L., Sagnik Chatterjee, Sayantan Patra +6
Exciton-phonon interactions govern the optical response of semiconductors, yet disentangling multiple coupling channels in lead halide perovskites remains challenging. We investiga…
Universal Thickness-Dependent Absorption in Solids at the Nanoscale: Anomalous Enhancement in the Ultrathin Limit
Bhumika Chauhan, Nikhil Singh, Subhrajit Dalai +5
Through systematic experimental and theoretical studies of layer-thickness-dependent absorption in semiconducting MoSe and WS across the visible to near-infrared spectral r…
Excited-State Trions in a Quantum Well
Sourabh Jain, Mikhail Glazov, Ashish Arora
We report on the observation of an excited 2s state of a trion in a 4.2 nm wide doped GaAs/Al(0.3)Ga(0.7)As quantum well (QW) using magneto-optical Kerr effect (MOKE) spectroscopy…