Multi-Color Tunable Semiconductor Device.
DEPARTMENT OF THE NAVY WASHINGTON DC
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A semiconductor multi-color filter spectrum analyzer is created by multiple epitaxial layers of varying composition. A DC sweep voltage is used to successively deplete the epitaxial layers. An AC voltage is used to modulate the absorption edge of the individual layers. A modification of this device concept is a bandwidth detector in which the spectral band width is a function of the applied DC voltage.
- Solid State Physics