How to increase S/N ratio by 10:1 in FIR transmission spectroscopy of high extinction index materials |
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| Affiliation: | 1. Space Physics Laboratory, Vikram Sarabhai Space Centre, Trivandrum, 695022, India;2. National Atmospheric Research Laboratory, P.B No. 123, Tirupathi, 517502, India;3. B1, CEEBROS, 47/20, III Main Road, Gandhi Nagar, Adayar, Chennai, 600020, India |
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| Abstract: | To obtain transmission spectra of materials with a high index of extinction is very difficult in the far IR for metals, superconductors, some ferroelectrics, etc. because films as thin as 300 Å are often transmitting less than 1%. It is shown that sticking the film onto a transparent plate and looking at the interference fringes can multiply transmission by a factor of 10 or more. |
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