Low threshold single mode lasing from suspended membrane photonic crystal surface emitting lasers

Temu, Balthazar, Peach, Tomas, Jones, Tyrone, Liu, Shangfeng and Li, Qiang ORCID: https://orcid.org/0000-0002-5257-7704 2026. Low threshold single mode lasing from suspended membrane photonic crystal surface emitting lasers. IEEE Photonics Journal 10.1109/JPHOT.2026.3665000

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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/cm2 and 20 μJ/cm2 respectively. This work paves the way to successful realization of low threshold single mode PCSELs for different applications.

Item Type:	Article
Date Type:	Published Online
Status:	In Press
Schools:	Schools > Physics and Astronomy
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	1943-0655
Date of First Compliant Deposit:	20 February 2026
Last Modified:	20 Feb 2026 12:15
URI:	https://orca.cardiff.ac.uk/id/eprint/185084

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