Superconductive Traveling-Wave Photodetectors: Fundamentals and Optical Propagation

This paper studies the theory of superconductive traveling-wave photodector devices (STWPDs), as a general platform for ultrafast, ultrasensitive, and ultralow-noise optoelectronic functions such as detection, modulation, photomixing, high-frequency electrical signal generation and amplification. Pr...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2008-07, Vol.44 (7), p.667-675
Main Authors: Ghamsari, B.G., Majedi, A.H.
Format: Article
Language:English
Subjects:
Applied sciences
Cauchy integral method
Devices
Electronics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Mathematical analysis
Mathematical models
Modulation
Optical elements, devices, and systems
Optical films
Optical propagation
Optical waveguides
Optical waveguides and coupleurs
Optics
Optoelectronic devices
Photodetectors
Physics
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Signal generation
Signal generators
Superconducting thin films
superconductive optical waveguides
Superconductive photodetectors
Superconductivity
Superconductors
Thin film devices
Thin films
Transmission line matrix methods
traveling-wave optoelectronic devices
Ultrafast optics
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Summary:This paper studies the theory of superconductive traveling-wave photodector devices (STWPDs), as a general platform for ultrafast, ultrasensitive, and ultralow-noise optoelectronic functions such as detection, modulation, photomixing, high-frequency electrical signal generation and amplification. Principles of operation of STWPDs are discussed based on the kinetic-inductance theory of superconductive thin films and a thorough investigation of the guiding mechanism of light within this class of devices is presented. The transfer matrix method is introduced to model the superconductive optical waveguide in TWDs and an efficient numerical method based on the Cauchy integral method and the argument principle method are developed for the analysis and design of the waveguides. Moreover, several regimes of device operation will be distinguished in terms of the modal characteristics of the optical waveguide and their effects on the overall performance of the device will be highlighted.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2008.922409