Modulation of unidirectional reflection lasing via the dual mechanisms of destructive interference and asymmetric distributed feedback
Phys. Rev. Applied 25, 064011 – Published 3 June, 2026
DOI: https://doi.org/10.1103/ws6v-b98c
Abstract
The ingenious scheme we propose for achieving unidirectional reflection lasing (URL) onset involves integrating a one-dimensional 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 direct and secondary reflections, whereas on the left-side direct 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 the destructive-interference point, thereby enabling the onset and active modulation of URL. Our scheme not only effectively circumvents the stringent structural-parameter tuning process required to directly reach the URL onset, but also benefits the integration of active photonic devices into compact quantum networks and may improve the efficiency of optical information transmission.
