Controlling polarization of vertical-cavity surface-emitting lasers using amorphous silicon subwavelength transmission gratings

Steven J. Schablitsky, Lei Zhuang, Rick C. Shi, Stephen Y. Chou

Research output: Contribution to journalArticle

52 Scopus citations

Abstract

Control of the polarization of vertical-cavity surface-emitting lasers (VCSELs) using a 240-nm-thick amorphous silicon subwavelength transmission grating (SWTG) is demonstrated. The grating, which has a strong polarization dependent reflectance and transmittance, was placed in front of the output window of a VCSEL. It was found that the SWTG can fix the VCSEL's polarization in the direction perpendicular to the grating fingers, switch polarization directions, enhance the polarization ratio from 20:1 to over 200:1, and decrease the threshold current. Integration of these gratings into the VCSEL structure is discussed.

Original languageEnglish (US)
Pages (from-to)7-9
Number of pages3
JournalApplied Physics Letters
Volume69
Issue number1
DOIs
StatePublished - Jul 1 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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