Light-controlled perfect absorption of light

We study coherent perfect absorption (CPA) of light in a Kerr nonlinear metal-dielectric composite medium, illuminated from the opposite ends. Elementary symmetry considerations reveal that equality of the incident light intensities is a prerequisite to ensure CPA in both linear and nonlinear system...

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Bibliographic Details
Published in:Optics letters 2013-12, Vol.38 (24), p.5252-5255
Main Authors: Nireekshan Reddy, K, Dutta Gupta, S
Format: Article
Language:English
Subjects:
Coherence
Dynamical systems
Hysteresis
Incident light
Linear systems
Nonlinear dynamics
Scattering
Symmetry
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Summary:We study coherent perfect absorption (CPA) of light in a Kerr nonlinear metal-dielectric composite medium, illuminated from the opposite ends. Elementary symmetry considerations reveal that equality of the incident light intensities is a prerequisite to ensure CPA in both linear and nonlinear systems for specific system parameters. We also derive the sufficient conditions for having CPA. We further show that, while CPA in a linear system is insensitive to the incident power level, in a nonlinear system CPA can be achieved only for discrete intensities with interesting hysteretic responses. Our unified formulation of CPA and waveguiding identifies them as opposite scattering phenomena. We further investigate light-induced CPA in on-resonant and off-resonant systems.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.38.005252