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Nonlinear optical switch based on coherent perfect absorption.

Miao-Di Guo, Hai-Feng Li, Feng-Lei Wang

|August 1, 2023

Summary

This summary is machine-generated.

We demonstrate a novel optical switch utilizing coherent perfect absorption (CPA) and coherent perfect reflection (CPR). This switch can convert between CPA and CPR states using an incoherent field, achieving high switching efficiency.

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Area of Science:

Optics and Photonics
Quantum Optics
Materials Science

Background:

Coherent perfect absorption (CPA) and coherent perfect reflection (CPR) enable precise control of optical fields.
Typically, CPA and CPR require specific input-field phase relationships.

Purpose of the Study:

To propose a scheme for a bistable optical switch with convertible CPA and/or CPR functionalities.
To investigate the control mechanism and operational regimes of the proposed switch.

Main Methods:

Utilizing an incoherent field to switch between CPA and CPR states, even when input probe beams are in phase.
Analyzing the switch's operation in both linear (weak input) and nonlinear/bistable (strong input) regimes.

Main Results:

Demonstrated conversion between CPA and CPR states using an incoherent switching field.
Achieved theoretically a maximum switching efficiency of η=1.
Showcased operation in linear and nonlinear regimes, with efficiency sensitive to input-field intensity.

Conclusions:

The proposed scheme offers a novel method for bistable optical switching with high efficiency.
The intensity-dependent efficiency suggests potential applications in sensitive optical detection.