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2 results

  • 7 - Light Emitting Diodes

  • Mauro Nisoli, Politecnico di Milano
  • Book:
    Semiconductor Laser Photonics
    Published online:
    10 November 2022
    Print publication:
    24 November 2022, pp 188-210

  • Summary

    Light emitting diodes (LEDs): photon flux, injection efficiency, internal quantum efficiency. Double-heterostructure LEDs. Burstein-Moss shift. Carrier overflow. Carrier leakage over the barrier. External efficiency of a LED: transmission efficiency and external quantum efficiency. Output power, responsivity, and wall-plug efficiency. Emission pattern of LEDs. Luminous efficiency. Blue LEDs.

  • 9 - Selected Topics on Photon Transduction

  • from Part III - Selected Topics on Physics of Transduction
  • Marco Tartagni, University of Bologna
  • Book:
    Electronic Sensor Design Principles
    Published online:
    23 December 2021
    Print publication:
    06 January 2022, pp 425-467

  • Summary

    Photon transduction is a fundamental process of any optical detector or image sensor where the basic task is to estimate an average quantity of photons versus time and/or space. We start from basic physical phenomena of the optical transduction considering photon flux as an average quantity, disregarding the quantum mechanics characteristics of a single photon. Then, we investigate the role of noise in the transduction process to better assess design rules in electronic design of interfaces. As in the other transduction chapters, we treat only a very small part of existing optical sensor implementations to serve as examples of the application of the transduction principle.