Absorption-induced transmission in plasma microphotonics.

ABSTRACT: Ionised gas, i.e., plasma, is a medium where electrons-ions dynamics are electrically and magnetically altered. Electric and magnetic fields can modify plasma's optical loss, refraction, and gain. Still, plasma's low pressure and large electrical fields have presented as challenges to introducing it to micro-cavities. Here we demonstrate optical microresonators, with walls thinner than an optical wavelength, that contain plasma inside them. By having an optical mode partially overlapping with plasma, we demonstrate resonantly enhanced light-plasma interactions. In detail, we measure plasma refraction going below one and plasma absorption that turns the resonator transparent. Furthermore, we photograph the plasma's micro-striations, with 35 μm wavelength, indicating magnetic fields interact

SUBMITTER: Bathish B 

PROVIDER: S-EPMC10374664 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature