System Which uses Porous Silicon for Down Converting Electromagnetic Energy to an Energy Level within the Bandpass of an Electromagnetic Energy Detector
Patent, Filed 6 Mar 97, patented 27 Oct 98
DEPARTMENT OF THE NAVY WASHINGTON DC
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An electromagnetic energy detector system down converts electromagnetic energy from a relatively high energy beyond the detectable range of an electromagnetic energy detector to a lower energy level within the detectable range of the electromagnetic energy detector. The detector includes a transparent substrate, a porous silicon structure formed on the substrate for down converting electromagnetic energy characterized by a first wavelength W1 to electromagnetic energy characterized by a second wavelength W2, where W2W1 and an electromagnetic energy detector for detecting the down converted electromagnetic energy. The detector is useful in applications where the electromagnetic energy detector would ordinarily be incapable of detecting the higher level electromagnetic energy directly without going through the down conversion process effectuated by the porous silicon structure.
- Optical Detection and Detectors