Abstract

We describe a brass light pipe (LP) mounted in a cylindrical optical accessory for attenuated total reflection (ATR) that can be used to readily obtain the infrared spectra of liquids and monolayers. As examples, we show the LP spectra of isooctane, decane, dimethyl malonate, dodecanol, dodecanethiol, and acetic acid and compare them to those obtained by transmission as well as by ATR. In addition, we utilize a dodecanethiol monolayer spectrum to illustrate the sensitivity of the LP scheme.

Far Infrared Transmission through Metal Light Pipes*

R. C. Ohlmann, P. L. Richards, and M. Tinkham
J. Opt. Soc. Am. 48(8) 531-533 (1958)

Infrared Spectra of Monolayers on Metal Mirrors

S. A. Francis and A. H. Ellison
J. Opt. Soc. Am. 49(2) 131-138 (1959)

Custom-built light-pipe cell for high-resolution infrared absorption spectroscopy of tritiated water vapor and other hazardous gases

Johannes Müller, Magnus Schlösser, Frank Hase, Nicolas Ziegler, Robin Grössle, David Hillesheimer, and Johannes Orphal
Opt. Express 27(12) 17251-17261 (2019)

Attenuated total reflectance spectroscopy with chirped-pulse upconversion

Hideto Shirai, Constance Duchesne, Yuji Furutani, and Takao Fuji
Opt. Express 22(24) 29611-29616 (2014)

Far Infrared Transmission through Metal Light Pipes with Low Thermal Conductance

R. E. Harris, R. L Cappelletti, and D. M. Ginsberg
Appl. Opt. 5(6) 1083-1084 (1966)