# Optical properties of periodic, quasi-periodic, and disordered one-dimensional photonic structures

## TL;DR

This review explores how periodic, quasi-periodic, and disordered one-dimensional photonic structures influence light transmission, emphasizing the effects of aperiodicity and disorder on photonic band gaps and potential applications.

## Contribution

It provides a comprehensive analysis of the physical properties, fabrication, and light transmission behavior of various 1D photonic structures with different degrees of order and disorder.

## Key findings

- Disorder affects light transmission and is related to the Shannon index.
- Clustering of high refractive index layers influences total light transmission.
- Refractive index contrast and defects modify light propagation in disordered structures.

## Abstract

Photonic crystals are characterized by a spatial modulation of the dielectric constant on the length scale of the wavelength of light giving rise to energy ranges where light cannot propagate through the crystal - the photonic band gap. While mostly photonic crystals are referred to as periodic arrangements, in this review we aim to highlight as well how aperiodicity and disorder affects light modulation. In this review article, we introduce the concepts of periodicity, quasi-periodicity, and disorder in photonic crystals, focussing on the one-dimensional case. We discuss in detail the physical peculiarities, the fabrication techniques, and the applications of periodic, quasi-periodic, and disorder photonic structures, highlighting how the degree of crystallinity matters in the manipulation of light. We report different types of disorder in 1D photonic structures and we discuss their properties in terms of light transmission. We discuss the relationship between the average total transmission, in a range of wavelengths around the photonic band gap of the corresponding photonic crystal, and the homogeneity of the photonic structures, quantified by the Shannon index. Then we discuss the light transmission in structures in which the high refractive index layers are aggregated in clusters following a power law distribution. Finally, in the case of structures in which the high refractive index layers are aggregated in clusters with a truncated uniform distribution, we discuss: i) how different refractive index contrast tailors the total light transmission; ii) how the total light transmission is affected by the introduction of defects made with a third material.

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Source: https://tomesphere.com/paper/1706.06276