Lattice-relaxed vertical optical cavities
First Claim
1. A vertical optical cavity, comprising:
- a lattice-matched portion grown to match a lattice defining material, the lattice-matched portion including a bottom Distributed Bragg Reflector and a region coupled to the bottom Distributed Bragg Reflector; and
a lattice-relaxed portion having a lattice mismatch factor and including a top Distributed Bragg Reflector on the lattice-matched portion, wherein the top and bottom Distributed Bragg Reflectors are epitaxially grown.
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Abstract
A monolithic long-wavelength vertical optical cavity device built up along a vertical direction. The device, when designed as a surface emitting laser, has a bottom Distributed Bragg Reflector (DBR), an active region consisting of active bulk medium or quantum wells, a current confinement layer next to the active layer, and a top DBR. The bottom DBR and the active region are lattice matched to the lattice defining material, while the top DBR is lattice relaxed. The design achieves high reflectivity, low absorption and diffraction loss. The design also ensures low production cost due to low precision requirement and wafer size production. The device can be used as a light detector when the active region is replaced by a spacer or a optical filter.
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Citations
9 Claims
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1. A vertical optical cavity, comprising:
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a lattice-matched portion grown to match a lattice defining material, the lattice-matched portion including a bottom Distributed Bragg Reflector and a region coupled to the bottom Distributed Bragg Reflector; and
a lattice-relaxed portion having a lattice mismatch factor and including a top Distributed Bragg Reflector on the lattice-matched portion, wherein the top and bottom Distributed Bragg Reflectors are epitaxially grown. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification