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T-ray multilayer interference filter
An optical multilayer interference filter is made from two or more different dielectric materials layered in such a way that it promotes constructive/destructive wave interference for a selected frequency in the direction normal to the layers. Usually, each layer has the thickness of a quarter of wa...
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Main Authors: | , , , |
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Format: | Conference Proceeding |
Language: | English |
Subjects: | |
Online Access: | Request full text |
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Summary: | An optical multilayer interference filter is made from two or more different dielectric materials layered in such a way that it promotes constructive/destructive wave interference for a selected frequency in the direction normal to the layers. Usually, each layer has the thickness of a quarter of wavelength at which the stopband is required. In this paper, a quarter-wave interference filter is realised for T-ray applications. The dielectric materials used are high-resistivity silicon and free space, both of which have high transparency to T-rays and flat responses over the frequencies of interest. The designed thickness of both materials is in the order of a hundred microns. The THz-TDS measurement of the finished structure is in agreement with theory. |
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ISSN: | 2162-2027 |
DOI: | 10.1109/ICIMW.2007.4516511 |