Quantum description of light propagation in generalized media

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Quantum description of light propagation in generalized media. / Häyrynen, Teppo; Oksanen, Jani.

In: Journal of Optics, Vol. 18, No. 2, 025401, 05.01.2016, p. 1-7.

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@article{9958cefaa7244adc9520c63609ac3e64,
title = "Quantum description of light propagation in generalized media",
abstract = "Linear quantum input-output relation based models are widely applied to describe the light propagation in a lossy medium. The details of the interaction and the associated added noise depend on whether the device is configured to operate as an amplifier or an attenuator. Using the traveling wave (TW) approach, we generalize the linear material model to simultaneously account for both the emission and absorption processes and to have point-wise defined noise field statistics and intensity dependent interaction strengths. Thus, our approach describes the quantum input-output relations of linear media with net attenuation, amplification or transparency without pre-selection of the operation point. The TW approach is then applied to investigate materials at thermal equilibrium, inverted materials, the transparency limit where losses are compensated, and the saturating amplifiers. We also apply the approach to investigate media in nonuniform states which can be e.g. consequences of a temperature gradient over the medium or a position dependent inversion of the amplifier. Furthermore, by using the generalized model we investigate devices with intensity dependent interactions and show how an initial thermal field transforms to a field having coherent statistics due to gain saturation.",
keywords = "light-matter interaction, quantum input-output relation, quantum traveling wave model, saturating interaction",
author = "Teppo H{\"a}yrynen and Jani Oksanen",
year = "2016",
month = "1",
day = "5",
doi = "10.1088/2040-8978/18/2/025401",
language = "English",
volume = "18",
pages = "1--7",
journal = "Journal of Optics",
issn = "2040-8978",
number = "2",

}

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TY - JOUR

T1 - Quantum description of light propagation in generalized media

AU - Häyrynen, Teppo

AU - Oksanen, Jani

PY - 2016/1/5

Y1 - 2016/1/5

N2 - Linear quantum input-output relation based models are widely applied to describe the light propagation in a lossy medium. The details of the interaction and the associated added noise depend on whether the device is configured to operate as an amplifier or an attenuator. Using the traveling wave (TW) approach, we generalize the linear material model to simultaneously account for both the emission and absorption processes and to have point-wise defined noise field statistics and intensity dependent interaction strengths. Thus, our approach describes the quantum input-output relations of linear media with net attenuation, amplification or transparency without pre-selection of the operation point. The TW approach is then applied to investigate materials at thermal equilibrium, inverted materials, the transparency limit where losses are compensated, and the saturating amplifiers. We also apply the approach to investigate media in nonuniform states which can be e.g. consequences of a temperature gradient over the medium or a position dependent inversion of the amplifier. Furthermore, by using the generalized model we investigate devices with intensity dependent interactions and show how an initial thermal field transforms to a field having coherent statistics due to gain saturation.

AB - Linear quantum input-output relation based models are widely applied to describe the light propagation in a lossy medium. The details of the interaction and the associated added noise depend on whether the device is configured to operate as an amplifier or an attenuator. Using the traveling wave (TW) approach, we generalize the linear material model to simultaneously account for both the emission and absorption processes and to have point-wise defined noise field statistics and intensity dependent interaction strengths. Thus, our approach describes the quantum input-output relations of linear media with net attenuation, amplification or transparency without pre-selection of the operation point. The TW approach is then applied to investigate materials at thermal equilibrium, inverted materials, the transparency limit where losses are compensated, and the saturating amplifiers. We also apply the approach to investigate media in nonuniform states which can be e.g. consequences of a temperature gradient over the medium or a position dependent inversion of the amplifier. Furthermore, by using the generalized model we investigate devices with intensity dependent interactions and show how an initial thermal field transforms to a field having coherent statistics due to gain saturation.

KW - light-matter interaction

KW - quantum input-output relation

KW - quantum traveling wave model

KW - saturating interaction

UR - http://www.scopus.com/inward/record.url?scp=84955304382&partnerID=8YFLogxK

U2 - 10.1088/2040-8978/18/2/025401

DO - 10.1088/2040-8978/18/2/025401

M3 - Article

VL - 18

SP - 1

EP - 7

JO - Journal of Optics

JF - Journal of Optics

SN - 2040-8978

IS - 2

M1 - 025401

ER -

ID: 1567769