In this article, we propose a new approach for effective detection of infrared (IR) radiation, using an absorber consisting of two successive metal‐dielectric layers. To this end, a low cost, high‐efficiency composite IR absorber structure consisting of a set of two double‐layered element of thin metal layers paired with dielectric materials is presented. The proposed composite absorber can be tuned based on the metal layer sheet resistance and the thickness of various poly‐Si media; by appropriate choice of physical, electrical, and optical parameters, so that maximal absorption over both mid‐wave IR band regions (MWIR) and long wavelength IR band regions (LWIR) (3–12 μm), is achieved. The outcome of study indicates that the presented absorber configuration may be a promising candidate for integration into microbolometric detectors; while offering improved efficiency and functionality, for not critical timing applications, synchronously in both the MWIR and LWIR atmospheric thermal windows.

No abstract

No abstract

No abstract

The purpose of the study is to optimize the design parameters of nanocomposites matrices deposited on silicon substrate, in the optical domain. Specifically, the interaction of polarized photons with several samples of nanocomposite matrices, consisting of different concentrations of gold nanoparticles dispersed into different concentrations of PV A (poly-vinyl alcohol), deposited on silicon substrates at different spin coating speeds, were studied. Backscattered photons, under co-polarized and cross-polarized transmitter-receiver geometries, were detected and the degree of linear polarization (DOLP) was estimated. The outcome of this study allow us to assess the optimal design parameters of nanocomposites in the optical domain. It is of paramount significance to determine how nanostructures can be effectively integrated into polymer matrices and what new information or enhanced optical properties can be achieved.