Abstract
In this work, we investigate the generation of light in a distributed feedback (DFB) laser composed of periodically arranged layers of hyperbolic medium and active material forming a 1D photonic hypercrystal (PHC). The scope of our study covers the analysis of laser action in the presence of different types of dispersion that are achievable in a hyperbolic medium. Using the example of a PHC structure consisting of graphene-based hyperbolic medium, we demonstrate the possibility of controlling laser action by tuning effective dispersion. Our analysis reveals the possibility of obtaining a single-frequency generation with high side-mode suppression and controllable wavelength of operation. Moreover, we present a new mechanism for the modulation of laser amplitude arising from voltage-controllable dispersion of hyperbolic medium.
Highlights
The concept of controlling electromagnetic properties by proper design of an artificial structure has been widely investigated over the last few decades
The control of light propagation in photonic crystals relies on Bragg scattering of light due to a wavelength-scaled periodic spatial variation of the structure resulting in the appearance of a photonic bandgap
photonic hypercrystal (PHC) laser, we presented a new mechanism for modulation of laser amplitude arising from the dispersion properties of a hyperbolic medium
Summary
The concept of controlling electromagnetic properties by proper design of an artificial structure has been widely investigated over the last few decades. The metamaterial platform that relies on the average response originating from structurization of dimensions much smaller than the freespace wavelength of light has been considered as another promising way to obtain control over the light propagation [8,9] To date, these two approaches, which were previously considered to be mutually exclusive due to geometrical-scale separation, have been successfully employed to form basic building blocks of novel passive and active photonic devices [10]. To overcome the problem of scale separation, an application of a special class of optical metamaterials, so-called hyperbolic metamaterials (HMM), has been proposed This class of structure, typically realized in the simple multilayer form, reveals unique dispersion properties that allow the obtaining of many practical functionalities, such as tunable spectral filters [11], perfect absorbers [12], and many others [13,14,15,16,17,18]. PHC laser, we presented a new mechanism for modulation of laser amplitude arising from the dispersion properties of a hyperbolic medium
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