6 papers
Active Control of Topological Exceptional Points in Non-Hermitian Metasurfaces
Parul Sharma, Sobhan Subhra Mishra, Yash Gupta +4
Active control and ultrafast switching of non-Hermitian photonic systems are essential for next-generation reconfigurable optical technologies. Here, we demonstrate dynamic tempora…
Electrically Tunable Terahertz Chirality from Quantum Geometry
Sobhan Subhra Mishra, Thomas CaiWei Tan, Faxian Xiu +1
Quantum geometry encoded in the momentum space structure of electronic wavefunctions, governs charge dynamics through Berry curvature, enabling unconventional transport and optical…
Non-Equilibrium Orbital Transport in Terahertz Optorbitronics
Sobhan Subhra Mishra, Ranjan Singh
Modern information technologies rely on controlling the flow of electrons through their charge and spin. A rapidly emerging alternative is to use the orbital motion of electrons, t…
Electric-field Control of Giant Ferronics
Baolong Zhang, Ruihuan Duan, Sobhan Subhra Mishra +8
Ferrons are quantum excitations of electric polarization in ferroelectrics and electric analogues of magnons but have lacked direct experimental verification at room temperature. W…
Electrically tunable Floquet Weyl photon emission from Dirac semimetal Cd3As2
Sobhan Subhra Mishra, Thomas CaiWei Tan, Manoj Gupta +2
The ability to optically engineer the Dirac band and electrically control the Fermi level in two-dimensional (2D) Dirac systems, such as graphene, has significantly advanced quantu…
Terahertz Cavity Phonon Polaritons in Lead Telluride in the Deep-Strong Coupling Regime
Andrey Baydin, Manukumara Manjappa, Sobhan Subhra Mishra +9
Lead telluride is an important thermoelectric material due to its large Seebeck coefficient combined with its unusually low thermal conductivity that is related to the strong anhar…