Work

Low Threshold Single Mode Lasing from Suspended Membrane Photonic Crystal Surface Emitting Lasers

Year: 2026

Type: article

Abstract: Low lasing threshold is desirable in photonic integrated circuits and many other applications in order to reduce the power consumption of the lasing device. Double lattice photonic crystal surface emitting laser utilizing constructive interference between the two lattices can be used to realize lower lasing threshold compared to single lattice devices. Here we demonstrate single mode lasing of a double lattice device and compare to its single lattice counterpart. The device is made of a suspended membrane of InP photonic crystal layer on InP substrate. The average lasing threshold values measured for four single and four double lattice devices were about 43 μJ/cm2and 20 μJ/cm2respectively. This work paves the way to successful realization of low threshold single mode PCSELs for different applications.

Source: IEEE photonics journal

DOI: 10.1109/jphot.2026.3665000

Authors: Balthazar Temu, Tomas Peach, Tyrone Jones, Shangfeng Liu, Qiang Li

Institution: Cardiff University

Language: English

Topic: Photonic Crystals and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,075

Funder: Engineering and Physical Sciences Research Council