Explanipedia

Topological Hall effect in nonlinear optics Open

S. Nandi, A. Ghosh, Ashok K. Mohapatra, Ritwick Das · 2025

We present an experimental evidence of \emph{topological} Hall-effect in an all-optical third-order nonlinear optical process via spatial symmetry-breaking in pseudo-spin textures created by a spatially-structured pump laser beam. The expe…

All-optical Stern-Gerlach effect in a parity-time anti-symmetric nonlinear refractive medium Open

S. Nandi, A. Ghosh, Dinesh Beniwal, Abhishek Mondal, Ashok K. Mohapatra , et al. · 2025

The famous Stern-Gerlach experiment, which established spin as an inevitable degree of freedom, is one of the cornerstones in the development of quantum physics. Over the last few decades, the existence of spinors has been widely observed …

All-optical Stern-Gerlach effect in P T -symmetricnonlinear refractive medium Open

S. Nandi, A. Ghosh, Dinesh Beniwal, Abhishek Mondal, Ashok K. Mohapatra , et al. · 2025

About a century ago, an experiment performed by Otto Stern and Walther Gerlach turned out to be a cornerstone in establishing spin as an inevitable degree of freedom and subsequently, the experiment served as a versatile tool for preparing…

Non-interferometric measurement of geometric phase through stimulated second harmonic generation Open

Chahat Kaushik, Anirban Ghosh, Chaitanya Kumar Suddapalli, Kavita Devi, Ritwick Das , et al. · 2024

The geometric phase (GP), arising from the evolution of states like polarization on the Poincaré sphere, is conventionally measured using interferometry. However, the interferometric techniques often suffer from instability, causing GP to …

Non-interferometric measurement of geometric phase through stimulated second harmonic generation Open

Chahat Kaushik, Anirban Ghosh, Chaitanya Kumar Suddapalli, Kavita Devi, Ritwick Das , et al. · 2024

The geometric phase (GP), arising from the evolution of states like polarization on the Poincaré sphere, is conventionally measured using interferometry. However, the interferometric techniques often suffer from instability, causing GP to …

Cyclotriphosphazene-based organic frameworks as third-order nonlinear optical materials Open

Suresh Bommakanti, Satyapriya Nath, Rudrashish Panda, Ritwick Das, Bishnu P. Biswal · 2024

CTP-NLOphore based imine (CTP-TAPB) and vinylene-linked (CTP-TCPB) organic frameworks have been synthesized and their NLO properties explored using non-resonant fs laser excitations.

WSe2 thin-films as efficient optical limiters: A study on impact of annealing Open

Km. Surbhi, Utkalika Priyadarshni Sahoo, Pratap K. Sahoo, Ritwick Das · 2023

We present a detailed investigation on the impact of thermal annealing on the third-order nonlinear optical (NLO) properties of sputtered WSe2 thin-films. The process of annealing results in an appreciable change in morphology and texture …

Apodized photonic crystals: A non-dissipative system hosting multiple exceptional points Open

Abhishek Mondal, Shailja Sharma, Ritwick Das · 2023

Optical systems obeying non-Hermitian dynamics have been the subject of intense and concerted investigation over the last two decades owing to their broad implications in photonics, acoustics, electronics as well as atomic physics. A vast …

Wse2 Thin-Films as Efficient Optical Limiters: A Study on Impact of Annealing Open

Kumari Surbhi, Utkalika P. Sahoo, Pratap K. Sahoo, Ritwick Das · 2023

Green laser pumped congruently-grown LiTaO based singly-resonant optical parametric oscillator Open

Rashmi Rekha Sahoo, Mukesh Kumar Shukla, Ritwick Das · 2022

CCDC 2160658: Experimental Crystal Structure Determination Open

Mukundam Vanga, Shreenibasa Sa, Anupa Kumari, Tharun T. Ponduru, Ritwick Das , et al. · 2022