Optically Induced Transparency in a Micro-cavity

TL;DR

This paper demonstrates a novel optically induced transparency mechanism in a micro-cavity using four-wave mixing gain, enabling non-reciprocal transmission and potential applications in integrated optical and quantum information systems.

Contribution

Introduces a new method of achieving optically induced transparency in micro-cavities via nonlinear four-wave mixing coupling.

Findings

Observation of Fano-like resonance due to nonlinear interference.

Demonstration of non-reciprocal transmission at transparency windows.

Potential for compact, integrated optical and quantum information platforms.

Abstract

Electromagnetically induced transparency has the unique ability to optically control transparency windows with low light in atomic systems. However, its practical applications in quantum physics and information science are limited due to rigid experimental requirements. Here, we demonstrate a new mechanism of optically induced transparency in a micro-cavity by introducing a four-wave mixing gain to nonlinearly couple two separated resonances of the micro-cavity in an ambient environment. A signature Fano-like resonance was observed owing to the nonlinear interference of the two coupled resonances. Moreover, we show that the unidirectional gain of the four-wave mixing can lead to the remarkable effect of non-reciprocal transmission at the transparency windows. Optically induced transparency may offer a unique platform for a compact, integrated solution to all-optical and quantum information.