Abstract
Abstract The dependence of the selective reflection on wavelength and temperature is determined for cholesteryl nonanoate (CN), cholesteryl oleyl carbonate (COC), cholesteryl erucyl carbonate (CEC) containing five weight percent of cholesteryl chloride, and a 1 : 1 mixture of COC and CEC. In addition the wavelength at peak selective reflection is measured as a function of temperature. For each of the materials both the half-width of the spectral response curve and the maximum temperature coefficient of selective reflection of monochromatic light increase with wavelength. COC exhibits the highest temperature coefficient of 13,000 percent intensity change per degree centigrade (at a wavelength of 700 mμ), which may also be the highest temperature coefficient observed for any optical effect. A brief discussion deals with the scientific and technological significance of the results.
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