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Proceedings Paper • Open Access

Similarities and differences in microwave and optical radiation detection
Author(s): Negussie Tirfessa; Chandrasekhar Roychoudhuri

Paper Abstract

The differences and similarities between the detection processes involved in the microwave and visible electromagnetic (EM) waves are presented for the case of two beam superposition. A microwave receiver measures the motion of conduction electrons which responds linearly to the superposed time dependent EM field amplitudes. A visible light detector also responds to the superposition of the EM field amplitudes due to interactions with the detecting dipoles. However, the visible light detector measures the quantum of energy absorbed and responds to the square modulus of the superposition of the time dependent amplitudes of the EM fields. The measured current in the microwave detector is directly proportional to the superposed microwave amplitudes. The measured energy in visible light detector is directly proportional to the square modulus of the superposed visible light amplitudes. We will highlight the similarities and differences in the detection processes. These important similarities and difference are not underscored in most optics textbooks.

Paper Details

Date Published: 2 July 2019
PDF: 6 pages
Proc. SPIE 11143, Fifteenth Conference on Education and Training in Optics and Photonics: ETOP 2019, 111433W (2 July 2019); doi: 10.1117/12.2525442
Show Author Affiliations
Negussie Tirfessa, Manchester Community College (United States)
Chandrasekhar Roychoudhuri, Univ. of Connecticut (United States)


Published in SPIE Proceedings Vol. 11143:
Fifteenth Conference on Education and Training in Optics and Photonics: ETOP 2019
Anne-Sophie Poulin-Girard; Joseph A. Shaw, Editor(s)

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