Microdisc HgCdTe lasers operating at 22-25 μm under optical pumping

• DOI: 10.24108/preprints-3113368
• Publication Date: 2025-01-24T09:21:27Z
• Authors: Anna Razova; Vladimir Ruumyantsev; Ksenia Mazhukina; Vladimir Utochkin; Mikhail Fadeev; Alexander Dubinov; Vladimir Aleshkin; Nikolay Mikhailov; Sergey Dvoretsky; Dmitriy Shengurov; Nikita Gusev; Elena Morozova; Vladimir Gavrilenko; Sergey Morozov

Lasing from HgCdTe microdisc cavities is demonstrated at wavelengths as long as 22 — 25 μm. The optical threshold and operation temperature are far from being limited by intrinsic recombination processes. The employed ion etching technology appears to introduce additional defects in the vicinity of the microdiscs, degrading figures of merit as the height of the cavity increases. However, a watt-level mid-infrared pumping source should suffice for lasing in microdiscs with moderate height and ~100 μm diameter.