Light field distribution of general function photonic crystals

TL;DR

This paper introduces a new class of general function photonic crystals with spatially varying refractive indexes, enabling control over light transmission and intensity, including applications as optical magnifiers, attenuators, and diodes.

Contribution

The paper proposes a novel design of photonic crystals with linearly varying refractive indexes, revealing new optical properties and potential device applications.

Findings

Transmissivity can be greater than 1 or less than 1 depending on the refractive index variation.

Light intensity can be magnified or weakened, functioning as optical magnifiers or attenuators.

GFPCs can act as optical diodes for positive and negative incident light.

Abstract

In this paper, We have presented a new general function photonic crystals (GFPCs), which refractive indexes are line functions of space position in two mediums $A$ and $B$, and obtain new results: (1) when the line function of refractive indexes is up or down, the transmissivity can be far larger or smaller than 1. (2) when the refractive indexes function increase or decrease along the direction of incident light, the light intensity should be magnified or weaken, which can be made optical magnifier or attenuator. (3) The GFPCs can be made optical diode when the light positive and negative incident the GFPCs.