Periodic transmission peak splitting in one dimensional disordered photonic structures

TL;DR

This paper explores how to control and split transmission peaks in disordered one-dimensional photonic structures by varying layer optical lengths, enabling precise optical filtering applications.

Contribution

It introduces methods to modulate and split transmission peaks in disordered photonic structures through optical length variation, enhancing design flexibility.

Findings

Transmission peaks can be split by varying layer optical lengths.

Refractive index variation tunes peak width.

Disordered structures can be precisely engineered for optical filtering.

Abstract

In the present paper we present ways to modulate the periodic transmission peaks arising in disordered one dimensional photonic structures with hundreds of layers. Disordered structures in which the optical length nd (n is the refractive index and d the layer thickness) is the same for each layer show regular peaks in their transmission spectra. A proper variation of the optical length of the layers leads to a splitting of the transmission peaks. Notably, the variation of the occurrence of high and low refractive index layers, gives a tool to tune also the width of the peaks. These results are of highest interest for optical application, such as light filtering, where the manifold of parameters allows a precise design of the spectral transmission ranges.