Accession Number:

ADA210508

Title:

Two Photon Absorption Characterization

Descriptive Note:

Quarterly rept. no. 6, 28 Nov 1988-27 Feb 1989

Corporate Author:

NORTH TEXAS STATE UNIV DENTON DEPT OF PHYSICS

Personal Author(s):

• Littler, Chris
• Seiler, David G.

Report Date:

1989-05-15

Pagination or Media Count:

14.0

Abstract:

Magnetooptical measurements of Hg1-xCdxTe alloys have provided a new means of studying impurities and defects in this important II-VI material. Two-photon magnetoabsorption TMPA has been used to accurately determine the temperature dependence of the energy gap of various HgCdTe alloys, revealing behavior that deviates from currently accepted models. In addition, magnetooptical techniques have been used to detect the presence of both shallow and deep impuritiesdefects and accurately determine their activation energies, thus providing information necessary for understanding the electrical and optical properties of the material. Keywords Defect characterization Magneto-optical measurements Two photon spectroscopy Narrow band gap semiconductors Group II-VI compounds.

Descriptors:

• *TWO PHOTON ABSORPTION
• *MAGNETOOPTICS
• *MERCURY CADMIUM TELLURIDES
• MOLECULAR SPECTROSCOPY
• MATERIALS
• ENERGY GAPS
• ELECTRICAL PROPERTIES
• IMPURITIES
• DEFECTS(MATERIALS)
• GROUP II VI COMPOUNDS
• NARROWBAND
• SHALLOW DEPTH
• ACTIVATION ENERGY
• DEEP DEPTH
• OPTICAL PROPERTIES
• NARROW GAP SEMICONDUCTORS
• THERMAL PROPERTIES
• MEASUREMENT

Subject Categories:

• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE