Mbe Growth and Characterization of Hgcdte Heterostructures

1990 ◽  
Vol 198 ◽  
Author(s):  
R.J. Koestner ◽  
M.W. Goodwin ◽  
H.F. Schaake
Keyword(s):  
High Performance ◽  
Misfit Dislocations ◽  
Mbe Growth ◽  
Long Wavelength ◽  
Fine Control ◽  
Critical Materials ◽  
Long Wavelength Infrared ◽  
Growth Technology ◽  
Very High

ABSTRACTHgCdTe heterostructures consisting of a thin n-type widegap (250 meV or 5 μm cutoff) layer deposited on an n-type narrowgap (100-125 meV or 10-13 μm cutoff) layer offer the promise of very high performance metal-insulator-semiconductor (MIS) photocapacitors for long wavelength infrared (LWIR) detection. Molecular Beam Epitaxy (MBE) is a candidate growth technology for these two layer films due to its fine control in composition, thickness and doping concentration. The critical materials issues are reducing the defect content associated with twins in the grown layers, achieving low net donor concentrations in the widegap layer, and avoiding the formation of misfit dislocations at the HgCdTe heterointerface. This paper will report on our recent progress in these directions.

A Long-Wavelength Infrared Photoluminescence Spectrometer for the Characterization of Semiconductor Materials

1994 ◽  
Vol 299 ◽  
Author(s):  
R. P. Wright ◽  
S. E. Kohn ◽  
N. M. Haegel
Keyword(s):  
Infrared Detector ◽  
Optical Emission ◽  
High Sensitivity ◽  
Radiation Emission ◽  
Long Wavelength ◽  
Ion Laser ◽  
Detector Materials ◽  
Long Wavelength Infrared ◽  
Argon Ion

AbstractA new photoluminescence spectrometer has been developed for the characterization of optical emission in the 2.5 to 14.1 micron wavelength range. This instrument provides high sensitivity for the detection of interband and defect luminescence in a variety of infrared detector materials. The spectrometer utilizes a solid state photomultiplier detector and a circular variable filter, which serves as the resolving element. The entire spectrometer is cooled to 5K in order to decrease thermal radiation emission. Band-edge luminescence at 10.1 microns from HgCdTe samples has been readily detected with argon-ion laser excitation powers less than 70 mW/cm2. Representative spectra from HgCdTe and other infrared detector materials are presented.

(Invited) InAs/InAs1-XSbx Type-II Superlattices for High-Performance Long-Wavelength Infrared Medical Thermography

2015 ◽  
Vol 66 (7) ◽  
pp. 109-116
Author(s):  
M. Razeghi ◽  
A. Haddadi ◽  
G. Chen ◽  
R. Chevallier ◽  
A. M. Hoang
Keyword(s):  
High Performance ◽  
Type Ii ◽  
Long Wavelength ◽  
Type Ii Superlattices ◽  
Long Wavelength Infrared

Simultaneous Short and Long Wavelength Infrared Pyrometer Measurements in a Heavy Duty Gas Turbine

2001 ◽  
Author(s):  
J. R. Markham ◽  
H. M. Latvakoski ◽  
S. L. F. Frank ◽  
M. Lüdtke
Keyword(s):  
Gas Turbine ◽  
High Performance ◽  
Turbine Engines ◽  
Thermal Barrier ◽  
Suitable Alternative ◽  
Long Wavelength ◽  
Infrared Wavelengths ◽  
Heavy Duty Gas Turbine ◽  
Long Wavelength Infrared ◽  
Infrared Pyrometer

Advanced thermal barrier coatings (TBCs) are increasingly being used in high performance turbine engines. For optimized use of the coatings, accurate surface temperature measurements are required in the combustion environment. Current on-engine pyrometers, which use short infrared wavelengths to accurately measure the temperatures of metal surfaces, show increased uncertainties when used on TBCs. Studies have suggested that long infrared wavelengths are a suitable alternative. Therefore, to evaluate the response of both wavelength regions, simultaneous measurements with short and long wavelength infrared pyrometers have been accomplished in the first stage turbine of a Siemens V84.3A 60Hz 180MW engine at the Berlin Gas Turbine Development and Manufacturing Center.

InAs/InAs1-xSbxtype-II superlattices for high performance long wavelength infrared detection

2016 ◽  
Author(s):  
M. Razeghi ◽  
A. Haddadi ◽  
A. M. Hoang ◽  
R. Chevallier ◽  
S. Adhikary ◽  
...  
Keyword(s):  
High Performance ◽  
Infrared Detection ◽  
Long Wavelength ◽  
Long Wavelength Infrared
Sign in / Sign up

Export Citation Format

Share Document