| 摘要 |
A VCSEL includes a gap in a mirror stack and a protective layer sealing an end of the gap. The gap defines a boundary of the aperture of the VCSEL without introducing the stresses that oxide regions in oxide VCSELs can cause, and the protective layer, which can be a thin dielectric layer, shields the mirror stack from environmental damage. The VCSEL can thus achieve high reliability. A fabrication process for the VCSEL forms an oxidation hole, oxidizes a portion of an aluminum-rich layer in a mirror stack of the VCSEL exposed in the hole, and then removes all or some of the resulting oxide to form the desired gap. The protective layer can then be deposited to seal an end of the gap.
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