A simple technique is introduced for measuring the refractive index of plane-parallel samples having thickness of the order of a millimeter. The refractive index values are reported for six bulk semiconductors, each index measured at two infrared wavelengths using this method. The values are found to be within a few percent of those in literature for four semiconductors. The other two semiconductors were newly grown ternary alloys (CdMgTe and CdMnTe), for which the refractive index values have not been reported previously at the wavelengths studied here.
© 2014 Optical Society of America
Original Manuscript: March 25, 2014
Manuscript Accepted: April 22, 2014
Published: June 10, 2014
Joel M. Murray, Jean Wei, Jacob O. Barnes, Jonathan E. Slagle, and Shekhar Guha, "Measuring refractive index using the focal displacement method," Appl. Opt. 53, 3748-3752 (2014)