| Publisher | Ion-Optics, Inc. | ||
|---|---|---|---|
| Format | 760.0KB HTML | Date added | 01 Dec 2003 |
| Topics | Bandwidth Issues, Broadband, Nanotechnology | ||
| Downloads | 14 | ||
Thermal emission from heated materials follows the blackbody curve, multiplied by emissivity. Emissivity may be, but is not usually a strong function of wavelength. Ion Optics has developed a variety of surface texturing processes that create specific nano-structures which alter the emissivity in predictable fashion. Random structures produced by ion beam etching create long and/or short wavelength cutoffs. Repeated patterns produced by fine-line lithography, resembling photonic bandgap materials, have large peaks in the emitted spectrum. The central wavelength and bandwidth for lithographic structures can be varied with geometry. FWHM values for (Dl/l) are less than 0.1. These light sources reduce power requirements for applications now using broadband sources with filters, and in some cases entirely eliminate the need for filters.
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