Optical Properties of Single Crystals

P.B. Pickar et al [Engineering Sciences Lab., Dover, NJ, Research on Optical Properties of Single Crystal of Beta Phase Silicon Carbide. Summitry Tech. Rept. no. OR8394, May 5, 1965-June 5, 1966. Contract no. DA-28-017-AMC-2002, A, Oct. (1966) 85p. AD-641 198 ]... 

Bulgarovskaya, L, et al. 1983. Growth, structure and optical properties of single crystals of rubrene. Latvijas PSR Zinatnu Akademijas Vestis Fizikas un Tehnisko Zinatnu Serija 53. 

Visible luminescence is a well-known optical property of single crystal diamond particularly in the blue and green regions. This luminescence originates in the states at mid-bandgap and is caused by impurities and lattice defects. Cathodoluminescence (CL) is another characteristic of diamond. The CL of single crystal diamond is described as a band-A luminescence and the peak of the spectra is found between 2.4 and 2.8 eV (from green to purple-blue).f 2M lf J... 

Kraftmacher, G. A., and N. I. Furashov, 1967. Investigation of optical properties of single-crystal antiferromagnetic NiO in the long-wavelength infrared range. Zh. Prikl. Spectrosk. 95. 

An alternative measurement of the electronic properties of single crystals relies on an all-optical pump-probe technique, which measures the mobility of photogen-... 

G.N. Merberg, J. A. Harrington, Optical and Mechanical Properties of Single-Crystal Sapphire Optical Fibers , Applied Optics, v. 32, p. 3201, 1993. 

The optical properties of electrodeposited, polycrystalline CdTe have been found to be similar to those of single-crystal CdTe [257]. In 1982, Fulop et al. [258] reported the development of metal junction solar cells of high efficiency using thin film (4 p,m) n-type CdTe as absorber, electrodeposited from a typical acidic aqueous solution on metallic substrate (Cu, steel, Ni) and annealed in air at 300 °C. The cells were constructed using a Schottky barrier rectifying junction at the front surface (vacuum-deposited Au, Ni) and a (electrodeposited) Cd ohmic contact at the back. Passivation of the top surface (treatment with KOH and hydrazine) was seen to improve the photovoltaic properties of the rectifying junction. The best fabricated cell comprised an efficiency of 8.6% (AMI), open-circuit voltage of 0.723 V, short-circuit current of 18.7 mA cm, and a fill factor of 0.64. 

In the theory of optics this phenomenon is accounted for in terms of geometrical construction, but the physical picture is less convincing. Double refraction is a well-documented property of most crystals, at its most spectacular in Iceland spar. The double image of an object viewed through the crystal indicates the existence of two independent rays and not the components of a single ray. In mathematical terms the two rays are linearly independent and therefore orthogonal. Any intermediate situation represents a linear combination of the two orthogonal basis vectors and can be resolved into two components. What happens to an individual photon is however, not clear. 

Figure 6.10 Optical properties of CdS (a) experimental reflectance spectrum of single crystals of CdS (b) refractive index n of CdS obtained from data given in (a) through the Kramers-Kronig relation.

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