6533b85efe1ef96bd12c087d
RESEARCH PRODUCT
Unidirectional reflection from an integrated "taiji" microresonator
Stefano BiasiA. CalabreseIacopo CarusottoMartino BernardMher GhulinyanLorenzo PavesiHannah M. PriceFernando Ramiro-manzanosubject
PhysicsReciprocity; photonic device; microcavityLight transmissionbusiness.industryLorentz transformationCrossoverPhysics::Optics02 engineering and technologyÒptica021001 nanoscience & nanotechnology01 natural sciencesAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materials010309 opticssymbols.namesakeOpticsReciprocity (electromagnetism)0103 physical sciencessymbols0210 nano-technologybusinessdescription
We study light transmission and reflection from an integrated microresonator device, formed by a circular microresonator coupled to a bus waveguide, with an embedded S-shaped additional crossover waveguide element that selectively couples counter-propagating modes in a propagation-direction-dependent way. The overall shape of the device resembles a "taiji"symbol, hence its name. While Lorentz reciprocity is preserved in transmission, the peculiar geometry allows us to exploit the non-Hermitian nature of the system to obtain high-contrast unidirectional reflection with negligible reflection for light incident in one direction and a significant reflection in the opposite direction.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-01-01 |