Theory of a frequency-dependent beam splitter in the form of coupled waveguides

Abstract It is known that the beam splitter in the form of coupled waveguides (BS) is one of the main devices used in quantum optics and quantum technologies. A BS has two independent parameters: one is the reflection coefficient R or the transmission coefficient T, where $$R+T=1$$ R + T = 1 ; the s...

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Autor principal:	Dmitry N. Makarov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5576042db41f43c1a1bfe87d50f6f10e
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spelling	oai:doaj.org-article:5576042db41f43c1a1bfe87d50f6f10e2021-12-02T13:34:57ZTheory of a frequency-dependent beam splitter in the form of coupled waveguides10.1038/s41598-021-84588-w2045-2322https://doaj.org/article/5576042db41f43c1a1bfe87d50f6f10e2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84588-whttps://doaj.org/toc/2045-2322Abstract It is known that the beam splitter in the form of coupled waveguides (BS) is one of the main devices used in quantum optics and quantum technologies. A BS has two independent parameters: one is the reflection coefficient R or the transmission coefficient T, where $$R+T=1$$ R + T = 1 ; the second is the phase shift $$\phi $$ ϕ . In various applications of quantum optics, these coefficients are considered constant. This is due to the fact that the frequency dependence of these coefficients is usually not taken into account, or this dependence is such that it cannot affect the constancy of these coefficients. It is shown that the coefficients R, T and phase shift $$\phi $$ ϕ are generally values that depend on the frequencies of incoming photons, the interaction time of photons in the BS, and the type of BS. It is established that in general, R, T and $$\phi $$ ϕ cannot be considered constant coefficients, and the criteria for when they can be considered constant are defined. The results obtained must be taken into account when analyzing and planning experiments where the beam splitter is presented in the form of coupled waveguides.Dmitry N. MakarovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Dmitry N. Makarov Theory of a frequency-dependent beam splitter in the form of coupled waveguides
description	Abstract It is known that the beam splitter in the form of coupled waveguides (BS) is one of the main devices used in quantum optics and quantum technologies. A BS has two independent parameters: one is the reflection coefficient R or the transmission coefficient T, where $$R+T=1$$ R + T = 1 ; the second is the phase shift $$\phi $$ ϕ . In various applications of quantum optics, these coefficients are considered constant. This is due to the fact that the frequency dependence of these coefficients is usually not taken into account, or this dependence is such that it cannot affect the constancy of these coefficients. It is shown that the coefficients R, T and phase shift $$\phi $$ ϕ are generally values that depend on the frequencies of incoming photons, the interaction time of photons in the BS, and the type of BS. It is established that in general, R, T and $$\phi $$ ϕ cannot be considered constant coefficients, and the criteria for when they can be considered constant are defined. The results obtained must be taken into account when analyzing and planning experiments where the beam splitter is presented in the form of coupled waveguides.
format	article
author	Dmitry N. Makarov
author_facet	Dmitry N. Makarov
author_sort	Dmitry N. Makarov
title	Theory of a frequency-dependent beam splitter in the form of coupled waveguides
title_short	Theory of a frequency-dependent beam splitter in the form of coupled waveguides
title_full	Theory of a frequency-dependent beam splitter in the form of coupled waveguides
title_fullStr	Theory of a frequency-dependent beam splitter in the form of coupled waveguides
title_full_unstemmed	Theory of a frequency-dependent beam splitter in the form of coupled waveguides
title_sort	theory of a frequency-dependent beam splitter in the form of coupled waveguides
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/5576042db41f43c1a1bfe87d50f6f10e
work_keys_str_mv	AT dmitrynmakarov theoryofafrequencydependentbeamsplitterintheformofcoupledwaveguides
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Theory of a frequency-dependent beam splitter in the form of coupled waveguides

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