A digital-alloy AlGaAs/GaAs distributed Bragg reflector for application to 1.3 μm surface emitting laser diodes
- A digital-alloy AlGaAs/GaAs distributed Bragg reflector for application to 1.3 μm surface emitting laser diodes
- 조남기; 김광웅; 송진동; 최원준; 이정일
- distributed Bragg reflector; digital-alloy; Thin films; Epitaxy; Optical properties; Light absorption and reflection
- Issue Date
- Solid state communications
- VOL 150, NO 39-40, 1955-1958
- A distributed Bragg reflector (DBR) utilizing the digital alloy Al0.9Ga0.1As was grown by using the molecular beam epitaxy (MBE) method for application in 1.3 μm optical communications and compared to the analog-alloy AlGaAs/GaAs DBR. The transmission electron microscopic (TEM) image showed a highly abrupt boundary of AlAs and GaAs, which supports the formation of a digital-alloy Al0.9Ga0.1As layer. The measurement showed that the digital-alloy AlGaAs/GaAs DBR had similar reflection spectra with enhanced uniform distribution over the whole substrate surface compared to the analog-alloy one. In the digital-alloy Al0.9Ga0.1As/GaAs DBR cavity, the reflection dip position was measured at around 1273 nm and the standard deviation of the distribution of the reflection dip was 1.31 nm in wavelength over 1/4 of a three-inch wafer.
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