Contribution of Structure and Morphology of Design Constituents to Performance Improvement of Multilayer Polaritonic Photodetector

Abstract

This paper is devoted to estimate contribution of structure and morphology of the individual design constituents to performance improvement of multilayer polaritonic photodetector (optochemical sensor). Surface plasmon resonance (SPR) in the surface barrier heterostructure (SBH) with the corrugated interface is used as the basic principle underlying the device operation. The demonstration of correlation of the contribution with the enhanced SBH features was performed through the adequate characterization tool.

Enhanced Dielectric Environment Sensitivity of Surface Plasmon-Polariton in the Surface-Barrier Heterostructures Based on Corrugated Thin Metal Films with Quasi-Anticorrelated Interfaces

“…One of the implementations of high-sensitive active sensors is based on the grating coupler effect for the excitation of surface plasmon-polaritons (SPP) [1] in the surface-barrier heterostructures with Schottky barrier [2, 3]. Today, there are several techniques of forming a diffraction grating on the semiconductor substrate, namely, the laser-induced periodic surface structures [4], extreme ultraviolet lithography [5], electron beam lithography [6], ion beam lithography [7], nanoimprint technology [8], pulsed laser interference lithography [9], and laser interference lithography [10, 11].…”

Characterization of nanoscaled films on flat and grating substrates as some elements of plasmonics

“…Furthermore, the strong enhancement of the SPP local field at the surface and an extremely high sensitivity of the SPP dispersion law to optical properties of the interface make them a unique probe of the properties of surfaces and ultrathin films. For the greater sensitivity and more flexible design of SPP devices [3][4][5], the following steps could be useful: (i) inclusion of an additional covering and/or intermediate dielectric (SiO x ) and/or conducting (ITO) tuning layers; (ii) changing the dielectric function of the metal at the interface by means of a nanoscale structural modification [6] of it; and (iii) using a diffraction grating (DG) as the input-coupling component to excite SPPs in the metallic system.…”