12 September 2011 Optical response of a slab with time-periodic dielectric function ε(t): towards a dynamic metamaterial
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Abstract
A dielectric medium with time-periodic permittivity ε(t) gives rise to a band structure that is periodic in the frequency ω and exhibits wave vector gaps ▵k. Light reflected from and transmitted by such a dynamic slab contains harmonics ω - nΩ (n = 0, ±1,...) where Ω is the modulation frequency. Also, giant resonances are obtained in the response for ω = nΩ/2 with odd n, provided that a certain condition is satisfied for the slab thickness. Further, we show that a dynamic medium can be realized by means of a low-pass transmission line with varactors whose capacitance is C(t) = a ε(t) and inductances L = a μ0, a being the period.
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Peter Halevi, Uriel Algredo-Badillo, Jorge R. Zurita-Sánchez, "Optical response of a slab with time-periodic dielectric function ε(t): towards a dynamic metamaterial", Proc. SPIE 8095, Active Photonic Materials IV, 80950I (12 September 2011); doi: 10.1117/12.892953; https://doi.org/10.1117/12.892953
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