Electroreflectance Spectrum of Cuprous Oxide Crystals

Shestatskii, S. N.; Соболев, В. В.

doi:10.1002/pssb.19680280254

Cited by 4 publications

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“…The present note reports a further study of the ER spectrum of Cu20 in the region extended to 5 eV at room temperature. Measurements were made with the same apparatus (6) modified for the ultraviolet region. Besides, the modulating voltage between the sample and a P t electrode was increased up to 15 V in order to enhance the ER signal.…”

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Ultraviolet Electroreflectance of Cuprous Oxide

Shestatskii¹,

Соболев²

1969

Physica Status Solidi (b)

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Institute of Applied Physics, Academy of Sciences of the Moldavian SSR, Kishinev Ultraviolet Electroreflectance of Cuprous Oxide BY S. N. SHESTATSKXI and V. V. SOBOLEV During the last years the reflectivity and absorption spectra of Cu 0 have been 2 investigated with great intensity in the wide region of the fundamental absorption (1 to 5). Two communications concerning electroreflectance (ER) (6) and electroabsorption (7) of this material appeared quite recently. In our work (6) the first 3 electroreflectance study of cuprous oxide crystals etched by concentrated HNO was made in the region of blue-green and blue exciton series at T = 293 K. 0

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Ultraviolet Electroreflectance of Cuprous Oxide

Shestatskii¹,

Соболев²

1969

Physica Status Solidi (b)

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Exciton electro‐reflectance of cuprous oxide crystals

Shestatskii¹,

Соболев²,

Likhobabin³

1970

Physica Status Solidi (b)

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The electro-reflectance spectrum of Cu,O single crystals was measured in the region of blue and violet exciton series (5000 to 4000 A) a t T = 77.3 "K. Both the modulating voltage U,, and the dc bias voltage Udc were varied. The elcctro-reflectance structure obtained is due to the electric field effect on the n = 1 and n = 2 exciton lines of the blue and violet cxciton series of cuprous oxide. The inversion of the electro-reflectance structure occurs for some values of the ac voltage being different for various dc biases. This phcnomenon is due to the presence of surface band bending of Cu,O samples investigated. Agreement was obtained with the basic conclusions of Aspnes and Frova's theory taking into account the influence of the surface field non-uniformity on the line-shapes of the electroreflectance spectra.

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