80-nm-tunable high-index-contrast subwavelength grating long-wavelength VCSEL: Proposal and numerical simulations

Il-Sug Chung, Jesper Mørk, Alexei Sirbu, Vladmir Lakovle, Alexandru Mereuta, Andrei Caliman, Kapon Elyahou

Research output: Contribution to journalConference articleResearchpeer-review


A widely-tunable single-mode long wavelength vertical-cavity surface-emitting laser structure employing a MEMStunable high-index-contrast subwavelength grating (HCG) is suggested and numerically investigated. A very large 80- nm linear tuning range was obtained as the HCG was actuated by -220 to 250 nm. The large tuning range results from making the air gap part of the optical cavity, which was achieved by inserting an antireflection layer below the air gap and by the absence of partial top DBR for current spreading. The single mode operation was maintained throughout the tuning range, thanks to the selective pumping of the fundamental mode and the moderate mode selection by the HCG itself. Analytic expressions for tuning range and tuning sensitivity were derived, using the penetration depth of the HCG for the first time.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Pages (from-to)76150K
Publication statusPublished - 2010
EventPhotonics West 2010 - San Francisco, CA, United States
Duration: 23 Jan 201028 Jan 2010


ConferencePhotonics West 2010
CountryUnited States
CitySan Francisco, CA

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