The main objective of this research is to enhance performance of Peltier

cooled photodetectors used for sensitive and fast response detection in

the long wavelength infrared (LWIR) spectral range. The devices have found

important applications in IR spectrometry, quantum cascade laser based gas

analyzers, laser radiation alerters and many other IR systems. Enhancement

was achieved with more effective thermoelectrical cooling and improved

semiconductor heterostructures. As a result we managed to extend the

useful spectral range to longer wavelengths (>16 µm), increase speed of

response and decrease power consumption of thermoelectrical coolers. This

study shows that such solutions can be used in next generation mid- and

long wavelengths TE cooled photodetectors.

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