Abstract
We present a simple expression of a function which can be used to determine coherent perfect absorption (CPA) for any dissipative medium. The expression is derived through electromagnetic wave treatment and interface boundary conditions for illumination with TE-polarized light on a CPA slab from opposite side. This expression can be used to estimate the values of various parameters required for observation of coherent perfect absorption in a given medium characterized by a complex dielectric constant. The results of the theoretical expression are found to be in good agreement with those obtained through numerical simulations.
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