| 摘要 |
PURPOSE: A layers for vertical cavity surface emitting lasers and method of thereof are provided to reduce or prevent defect formation and migration by increasing optical absorption in the mirror stacks or by degrading the electro-optic properties of the active region. CONSTITUTION: A VCSEL(10) includes a cavity region(12) that is sandwiched between a first mirror stack(14) and a second mirror stack(16), which is formed on a substrate(18). Cavity region(12) includes one or more active layers(20) (e.g., a quantum well or one or more quantum dots) that are sandwiched between a pair of spacer layers(22,24). In other embodiments, active layer(20) is located above or below a single spacer layer. A pair of electrical contacts(28,30) enable VCSEL(10) to be driven by a suitable driving circuit. In operation, an operating voltage is applied across electrical contacts(28,30) to produce a current flow in VCSEL(10).
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