Polarized spectral emittance from periodic micromachined surfaces: IV. Undoped silicon: Normal direction in deep lamellar gratings
Journal Article
·
· Applied Optics; (United States)
- Hewlett-Packard, Route 41, Avondale, Pennsylvania 19311-0900 (United States)
Experimental results of thermal emittance from deep gratings are presented along with a theoretical discussion. We have found that for a certain grating geometry thermal emission peaks coincide with the cutoff frequencies of slab waveguides. The coincidence was found with {ital s}- but not {ital p}-polarized emission. This suggests that coupling between grating fins for {ital s}-polarized emission is small. It was also found that emission peaks do not correlate directly with the well-known grating equation for these deep gratings.
- DOE Contract Number:
- FG02-88ER13964
- OSTI ID:
- 7304041
- Journal Information:
- Applied Optics; (United States), Vol. 31:6; ISSN 0003-6935
- Country of Publication:
- United States
- Language:
- English
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