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Showing 1 to 4 of 4 for “"reflectivity spectrum"”.
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Piezoreflectance of gallium arsenide
The response of the reflectivity spectrum of single crystal GaAs to uniaxial stress in the (001) and (111) directions was determined. Interband transitions were detected at 1.425 t .015, 1.76 t .02, 2.89, 3.12, and 4.5 eVe The two lowest energy transitions are shown compatible with r symmetry, and …
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Optical studies of ion-bombarded gallium arsenide
… systems are investigated by means of optical reflectivity measurements and Raman-scattering techniques. Visible-ultraviolet reflectivity measurements have identified finite-size effects on the interband electronic excitations in microcrystalline GaAs (μ-GaAs), which is known from previous work …
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Aspects of stepped-frequency processing for low-frequency SAR systems
… of a wider portion of the target's reflectivity spectrum by combining the individual spectra of the transmitted narrow-bandwidth pulses in the frequency domain. It is shown here how this method may be used to avoid spectral regions that are heavily contaminated with RFI, thereby …
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Growth and optimization of quantum dots-in-a-well infrared photodetectors
… a DBR below the QDIP device that has a broad reflectivity spectrum (i.e. 8-11μm) and designed the resonant cavity for 9.5 μm wavelength. We have observed an increase in the responsivity of the device (0.76A/W at 1.4V) relative to devices with the same active region and no mirror or cavity. …