access icon free Evaluating resonances in PCSEL structures based on modal indices

The frequently sought after combination of characteristics in semiconductor lasers of high power together with narrow beam divergence and monochromatic output is usually difficult to attain. The photonic crystal surface emitting laser (PCSEL) is one category of device, however, which tends to provide the above-mentioned desirable output features. The PCSEL uses a large area optically active surface but with a two-dimensional periodic structure that enables it to generate high power in a narrow vertically emitted beam yet maintaining single wavelength operation. A primary requirement to model PCSELs is to obtain the optical field resonances that identify the lasing mode. This study presents an alternative method for evaluating the resonances, based essentially on the transfer-matrix technique and wave propagation in multilayer medium, which is relatively easy to formulate, and has quite modest demands on computing requirements.

Inspec keywords: laser modes; semiconductor device models; surface emitting lasers; matrix algebra; photonic crystals; laser theory; laser beams; semiconductor lasers

Other keywords: monochromatic output; PCSEL structures; modal indices; narrow beam divergence; transfer-matrix technique; single wavelength operation; optical field resonances; lasing mode; two-dimensional periodic structure; wave propagation; photonic crystal surface emitting laser; multilayer medium; high power semiconductor lasers; large area optically active surface; narrow vertically emitted beam

Subjects: Lasing action in semiconductors; Laser beam characteristics and interactions; Semiconductor lasers; Photonic bandgap materials; Laser beam interactions and properties; Semiconductor device modelling, equivalent circuits, design and testing; Optical materials

http://iet.metastore.ingenta.com/content/journals/10.1049/iet-opt.2018.5033
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content/journals/10.1049/iet-opt.2018.5033
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