Abstract
In the previous Chapter, the basic concepts of photodetectors were outlined.Furthermore, thermal detectors and the bolometer, specifically, were described in detail. In photon detectors, incident photons interact with the electrons in the material and change the electronic charge distribution. This perturbation of the charge distribution generates a current or a voltage that can be measured by an electrical circuit. Because the photon-electron interaction is “instantaneous”, the response speed of photon detectors is much higher than that of thermal detectors. Indeed, by contrast to thermal detectors, quantum or photon detectors respond to incident radiation through the excitation of electrons into a non-equilibrium state. The mechanisms of electron excitation are shown in Fig. 9.1.
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References
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Further reading
Dereniak, E.L. and Crowe, D.G., Optical Radiation Detectors, John Wiley & Sons, New York, 1984.
Dereniak, EX., and Boreman, G.D., Infrared Detectors and Systems, John Wiley & Sons, New York, 1996.
Holst, G.C., CCD Arrays, Cameras and Displays, Second Edition, SPIE Optical Engineering Press, Bellingham, WA, 1998.
Leigh, W.B., Devices for Optoelectronics, Marcel Dekker, New York, 1996.
Rogalski, A., Infrared Photon Detectors, SPIE Optical Engineering Press Bellingham, Washington, 1995.
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Razeghi, M. (2010). Photon Detectors. In: Technology of Quantum Devices. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-1056-1_9
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DOI: https://doi.org/10.1007/978-1-4419-1056-1_9
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