Analysis of lateral-mode confinement in VCSELs with ring metal apertures
| Autor: | Gennady A. Smolyakov, Marek Osinski |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Materials science
business.industry Aperture Physics::Optics Semiconductor device Laser Atomic and Molecular Physics and Optics Semiconductor laser theory law.invention Vertical-cavity surface-emitting laser Optics Distributed Bragg reflector laser law Optical cavity Physics::Accelerator Physics Optoelectronics business Refractive index |
| Zdroj: | Journal of Lightwave Technology. 23:4278-4286 |
| ISSN: | 0733-8724 |
| Popis: | The role of metal apertures in the mechanism of lateral-mode confinement in vertical-cavity surface-emitting lasers (VCSELs) is clarified by means of a detailed effective-frequency-method (EFM) analysis of an oxide-confined VCSEL structure with the oxide window larger than the p-contact metal aperture. We show that a ring metal contact on top of the VCSEL structure can change the conditions for lateral waveguiding by significantly modifying the local resonant properties of the VCSEL cavity. Resonant effects are demonstrated in the longitudinal coupled-cavity system consisting of the designed laser cavity, determined by two distributed Bragg reflectors (DBRs) and a spacer, and a very short cavity formed by the top DBR and the semiconductor-metal interface. The conditions for suppression of higher order lateral modes using metal apertures are established. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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