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arXiv · 1306.3394

Light-controlled perfect absorption of light

K. Nireekshan Reddy·S. Dutta Gupta
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Abstract

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, that in a nonlinear system can be achieved only for discrete intensities with interesting hysteretic response. Our unified formulation of CPA and waveguiding identifies them as opposite scattering phenomena. We further investigate light-induced CPA in on- and off- resonant systems.

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K. Nireekshan Reddy, S. Dutta Gupta. 2013-06-14. Light-controlled perfect absorption of light. https://doi.org/10.1364/ol.38.005252

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