EKHI

Far infrared study of the copper halides at low temperatures

J. N. Plendl, L. C. Mansur, A. Hadni, J. Claudel, Y. Henninger, G. Morlot, P. Strimer

The far infrared spectra of the copper halides CuCl, CuBr, and CuI have been measured in transmission and in reflection at various fixed temperatures from room temperature to liquid-helium temperature. Marked changes of such parameters as resonance frquency and damping …

24 entries

COPPER BROMIDE CuBr: Normal spectral reflectance, Normal spectral transmittance
COPPER CHLORIDE CuCl: Normal spectral reflectance, Normal spectral transmittance
COPPER IODIDE CuI: Normal spectral reflectance, Normal spectral transmittance

Energy band structure of gallium antimonide

W. M. Becker, A. K. Ramdas, H. Y. Fan

Resistivity, Hall coefficient, and magnetoresistance were studied for n- and p-type GaSb. The infrared absorption edge was investigated using relatively pure p-type, degenerate n-type, and compensated samples. Infrared absorption of carriers and the effect of carriers on the reflectivity were …

3 entries

GaSb INTERMETALLIC COMPOUND: Normal spectral reflectance, Normal spectral transmittance

Infrared lattice reflection spectra of III-V compound semiconductors

M. Hass, B. W. Henvis

The fundamental lattice reflection band of InSb, InAs, GaSb and GaAs has been measured at liquid helium temperature with a grating spectrometer. By comparing the observed spectrum with that calculated using a single classical dispersion oscillator, the following values of …

4 entries

MISCELLANEOUS INTERMETALLIC COMPOUNDS: Normal spectral reflectance
INDIUM PHOSPHIDE InP: Normal spectral reflectance
GaSb INTERMETALLIC COMPOUND: Normal spectral reflectance
INDIUM ARSENIDE InAs: Normal spectral reflectance

Far infrared optical properties of indium antimonide

R. B. Sanderson

The reflectivity of indium antimonide has been measured between 20 and 200 cm-1 at temperatures of 100 and 300°K on an interferometric modulation spectrometer. Classical dispersion formulae for the free carrier absorption and the lattice vibrations have been fitted to …

2 entries

InSb INTERMETALLIC COMPOUND: Normal spectral reflectance

Determination of optical constants and carrier effective mass of semiconductors

W. G. Spitzer, H. Y. Fan

By using reflectivity and absorption measurements in the region 5 to 35 micron, the effect of free carriers on the optical constants has been determined for n- and p-type germanium, silicon, and indium antimonide, and for n-type indium arsenide. The …

6 entries

InSb INTERMETALLIC COMPOUND: Normal spectral reflectance

PROPERTIES OF SOME VYCOR‐BRAND GLASSES

Martin E. Nordberg

Physical and chemical properties are discussed for Vycor‐brand 96% silica glasses prepared from glasses of lower silica content by a leaching process, and a brief résumé of this process is given. The intermediate porous glass and a translucent or white …

2 entries

VYCOR GLASSES: Normal spectral transmittance

A beam condenser for infrared spectrophotometers

Richard C. Brandt

The design and performance of a beam condenser for ir spectrophotometers such as the Beckman model IR-11 is described. The instrument has an image size of 4 mm X 8 mm and permits the use of samples mounted in the …

1 entries

SILVER BROMIDE AgBr: Angular spectral reflectance

Thermal Radiation Characteristics of Some Glasses

Howard O. Mcmahon

The emissivity, reflectivity, and transmissivity have been studied for a number of glasses throughout the wave‐length region 2.2 to μ, and through a temperature range of 500° to 1500°F. In general it is found that, although the spectral emissivity varies …

20 entries

MISCELLANEOUS GLASSES: Hemispherical spectral transmittance, Normal spectral reflectance, Normal spectral emittance
VYCOR GLASSES: Hemispherical spectral transmittance, Normal spectral reflectance, Normal spectral emittance
BOROSILICATE GLASSES: Hemispherical spectral transmittance, Normal spectral reflectance, Normal spectral emittance
PYREX: Hemispherical spectral transmittance, Normal spectral reflectance, Angular spectral reflectance, Normal spectral emittance

Photoconductivity in lead chloride and lead bromide

J. F. Verwey, N. G. Westerink

Photoconductivity measurements on PbCl₂ and PbBr₂ at liquid nitrogen temperature are described. It was found that the holes are the dominant mobile charge carriers in these crystals. The range per unit field was estimated to be 1.2 × 10^-4 cm²/V …

4 entries

LEAD DIBROMIDE PbBr₂: Normal spectral transmittance
MISCELLANEOUS CHLORIDES: Normal spectral transmittance
LEAD DIODIDE PbI₂: Normal spectral transmittance

Optical properties of zinc telluride in the infrared

Shin Ichiro Narita, Hiroyuki Harada, Keigo Nagasaka

ZnTe crystals were grown in a high pressure Tammann Furnace and doped with various kinds of impurities up to a carrier concentration of 8×10 ¹⁸ cm ^-3. The transmission and reflection spectra of undoped ZnTe crystals were measured …

10 entries

POTASSIUM BROMIDE KBr: Angular spectral reflectance
ZINC TELLURIDE ZnTe: Normal spectral reflectance, Normal spectral transmittance