Refractive Index of Carbon Dioxide Cryodeposit

Infrared Transmission of Contaminated Cryocooled Optical Windows

“…As the methane was temperature cycled (20 to 50 K) an interesting phase transformation took place. Figure 9b shows the infrared spectrum of this temperature cycled CH 4 (the thickness is uncertain but is estimated to be 9 /*m) and it is clear that the v 3 and v 4 bands have become much broader, 90 cm -l FWHM for v 3 compared to 20 cm ~l FWHM for the 20 K CH 4 , and also not as intense. The v 2 + v 4 band has also become much broader.…”

“…As the deposit transformed to an as yet undetermined phase, it became highly scattering as seen in visible light, and also the near infrared transmission dropped 5% because of scattering. The broad and weak nature of the v 3 and v 4 bands in the new phase CH 4 are indicative of an amorphous solid. Thus, it is believed that this phase is a metastable phase that the CH 4 solid passes through as it transforms to an alternate crystalline phase from the 20 K crystalline phase as the temperature is raised.…”

“…Moreover, the real part of the germanium complex index n g is known and given in Ref. 12 as (3) where X is in /mi and L= (\ 2 -0.028) -1 , A=3.99931, 5 = 0.391707, C=0.163492, D= -0.000006, £=0.00000053. This analytical form matches the observed values given in Ref.…”

An Investigation of the Techniques of Ellipsometry, Internal Reflection Spectroscopy, and Moment Analysis to the Study of Films and Substrates

“…The relationships among (1) (i:) \sin C cos C ~1~. o fe cos (C -P) cos C e + fo sin (C -P) sin C |e cos (C P) sin Ce -fo sin (C -P) cos C (35) It is often assumed that fe = fo; i.e., the compensator is perfectly dichroic, and the differences in multiple reflection effects along the two optical axes are negligible. Deviations from ideal behavior have been observed (Ref.…”

Raman Scattering Studies of Solid-Phase Species

“…The cryodeposit thickness was monitored using a dual-angle interference technique which is described in detail in Ref. 13. The particular technique used two, low-power.He-Ne (X = 6328 .A) laser beams which were injected into the vacuum chamber and specularly reflected from the Ge substrate at two accurately measured angles.…”