Image resolution depending on slab thickness and object distance in a two-dimensional photonic-crystal-based superlens Image resolution depending on slab thickness and object distance in a two-dimensional photonic-crystal-based superlens

TL;DR

This paper demonstrates a two-dimensional photonic crystal superlens capable of all-angle imaging with negative refraction for both TE and TM modes, analyzing its behavior, image quality, and loss compensation methods.

Contribution

It provides a systematic investigation of superlensing in 2D photonic crystals, including negative refraction, image quality, and loss compensation techniques.

Findings

Achieved all-angle single-beam negative refraction in 2D photonic crystals.

Observed high-quality focusing with a relative refractive index of -1.

Discussed loss compensation via optical gain in the system.

Abstract

Based on the exact numerical simulation and physical analysis, we have demonstrated all-angle single-beam left-handed behavior and superlens for both transverse electric and transverse magnetic modes in a twodimensional coated photonic crystal. The imaging behaviors by two-dimensional photonic-crystal-based superlens have been investigated systematically. Good-quality images and focusing, with relative refractive index of −1, have been observed in these systems for both polarized waves. In contrast to the images in near-field region for the lowest valence band, non-near-field images, explicitly following the well-known wave-beam negative refraction law, have been demonstrated. The absorption and compensation for the losses by introducing optical gain in these systems have also been discussed. Thus, extensive applications of such a phenomenon to optical devices are anticipated. Based on the exact numerical simulation and physical analysis, we have demonstrated all-angle single-beam left-handed behavior and superlens for both transverse electric and transverse magnetic modes in a twodimensional coated photonic crystal. The imaging behaviors by two-dimensional photonic-crystal-based superlens have been investigated systematically. Good-quality images and focusing, with relative refractive index of −1, have been observed in these systems for both polarized waves. In contrast to the images in near-field region for the lowest valence band, non-near-field images, explicitly following the well-known wave-beam negative refraction law, have been demonstrated. The absorption and compensation for the losses by introducing optical gain in these systems have also been discussed. Thus, extensive applications of such a phenomenon to optical devices are anticipated.