Large frequency range of negligible transmission in 1D photonic quantum well structures

TL;DR

This paper demonstrates that 1D photonic quantum well structures can significantly extend low transmission ranges and support high-quality defect modes through coupling mechanisms, enhancing control over light propagation.

Contribution

It introduces the use of defect engineering in photonic quantum well structures to achieve high-Q defect modes and broaden low transmission ranges in 1D photonic crystals.

Findings

Enlarged low transmission range in 1D photonic quantum well structures

High-Q defect modes can be achieved with defects

Coupling between defect and band edge modes enables defect mode transmission

Abstract

We show that it is possible to enlarge the range of low transmission in 1D photonic crystals by using photonic quantum well structures. If a defect is introduced in the photonic quantum well structures, defect modes with a very high quality factor may appear. The transmission of the defect mode is due to the coupling between the eigenmodes of the defect and those at the band edges of the constituent photonic crystals.