Cavity-output-field control via interference effects

TL;DR

This paper demonstrates how interference effects can be used to control the output electromagnetic field of an optical micro-resonator, enabling suppression or enhancement of the cavity output through external laser pumping.

Contribution

It introduces a method to manipulate cavity output fields via interference effects in a pumped two-level emitter system, applicable to photonic crystal environments.

Findings

Output field can be almost completely suppressed or enhanced.

Interference between scattered light and external laser controls the output.

Applicable to various cavity and photonic crystal systems.

Abstract

We show how interference effects are responsible for manipulating the output electromagnetic field of an optical micro-resonator in the good-cavity limit. The system of interest consists in a moderately strongly pumped two-level emitter embedded in the optical cavity. When an additional weaker laser of the same frequency is pumping the combined system through one of the resonator's mirrors then the output cavity electromagnetic field can be almost completely suppressed or enhanced. This is due to the interference among the scattered light by the strongly pumped atom into the cavity mode and the incident weaker laser field. The result applies to photonic crystal environments as well.