Palladium Diselenide Long-Wavelength Infrared Photodetector with High Sensitivity and Stability

Wavelength agile superlattice quantum dot infrared photodetector

A dual-band superlattice quantum dot infrared photodetector, providing bias-selectability of the response peaks, is demonstrated. The active region consists of two quantum dot superlattices separated by a graded barrier, enabling photocurrent generation only in one superlattice for a given bias polarity. Two response bands, one consisting of three peaks at 2.9, 3.2, and 4.9 m and the other cons...

Room-temperature short-wavelength infrared Si photodetector

The optoelectronic applications of Si are restricted to the visible and near-infrared spectral range due to its 1.12 eV-indirect band gap. Sub-band gap light detection in Si, for instance, has been a long-standing scientific challenge for many decades since most photons with sub-band gap energies pass through Si unabsorbed. This fundamental shortcoming, however, can be overcome by introducing n...

Novel GaAs photodetector with gain for long wavelength detection

A novel photodetector based upon annealed low temperature molecular beam epitaxy GaAs capable of detecting wavelengths out to 1.5 mm has been developed. The device utilizes a photoconductive detector with a high photo-generated carrier lifetime to transit time ratio in order to achieve a high internal gain. The sensitivity to illumination with photons of sub-bandgap energies is achieved due to ...

High Sensitivity Uncooled InAsSb Photoconductors with Long Wavelength

Impressive Reduction of Dark Current in InSb Infrared Photodetector to achieve High Temperature Performance

Infrared photo detectors have vast and promising applications in military,industrial and other fields. In this paper, we present a method for improving theperformance of an infrared photodetector based on an InSb substance. To achieve goodperformance at high temperatures, thermal noise and intrusive currents should bereduced. For this purpose, a five-layer hetero structu...