Unidirectional reflection lasing based on destructive interference and Bragg scattering modulation in defective atomic lattice

TL;DR

This paper proposes a novel scheme for unidirectional reflection lasing using a defective atomic lattice with destructive interference and Bragg scattering, enabling active control and potential integration into quantum networks.

Contribution

It introduces a new method to achieve and modulate unidirectional reflection lasing by combining atomic lattices with gain media, overcoming previous technical challenges.

Findings

Achieves unidirectional reflection lasing via destructive interference.

Demonstrates control of lasing direction through lattice parameter tuning.

Shows potential for integration into quantum photonic devices.

Abstract

The novel and ingenious scheme we propose for achieving unidirectional reflection lasing (URL) involves integrating a one-dimensional (1D) defective atomic lattice with a coherent gain atomic system. Its physical essence lies in the fact that the right-side reflectivity is drastically reduced due to the destructive interference between primary and secondary reflections, whereas on the left-side primary reflection is effectively suppressed and the secondary reflection is efficiently enhanced, ultimately reaching the lasing threshold. Through numerical results and further analyses, we have elucidated how to precisely tailor the lattice parameters and coupling fields to control destructive interference point (DIP), thereby realizing URL and enabling its active modulation. Our scheme is experimentally feasible and not only effectively circumvents the stringent conditions faced in directly realizing URL, providing a new pathway, but also beneficial for integrating active photonic devices into compact quantum networks and may improve the efficiency of optical information transmission.