Nonreciprocal lasing in topological cavities of arbitrary geometries

Bahari, Babak; Ndao, Abdoulaye; Vallini, Felipe; Amili, Abdelkrim El; Fainman, Yeshaiahu; Kanté, Boubacar

doi:10.1126/science.aao4551

articleScienceOct 13, 2017GREEN OA

Nonreciprocal lasing in topological cavities of arbitrary geometries

BBBabak Bahari ANAbdoulaye Ndao FVFelipe Vallini AEAbdelkrim El Amili YFYeshaiahu Fainman

University of California San Diego

PubMed

Indexed incrossrefpubmed

Abstract

Resonant cavities are essential building blocks governing many wave-based phenomena, but their geometry and reciprocity fundamentally limit the integration of optical devices. We report, at telecommunication wavelengths, geometry-independent and integrated nonreciprocal topological cavities that couple stimulated emission from one-way photonic edge states to a selected waveguide output with an isolation ratio in excess of 10 decibels. Nonreciprocity originates from unidirectional edge states at the boundary between photonic structures with distinct topological invariants. Our experimental demonstration of lasing from topological cavities provides the opportunity to develop complex topological circuitry of…

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Topics & keywords

Topics

Keywords

Lasing threshold
Photonic crystal
Photonics
Limit (mathematics)
Physics
Photonic integrated circuit
Laser
Optoelectronics

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