Controlling Fano resonances in multilayer dielectric gratings towards optical bistable devices.

Abstract:

:The spectral properties of Fano resonance generated in multilayer dielectric gratings (MDGs) are reported and numerically investigated in this paper. We examine the MDG consisting of numerous identically alternative chalcogenide glass (As2S3) and silica (SiO2) multilayers with several grating widths inscribed through the structure, emphasizing quality (Q) and asymmetric (q) factors. Manipulation of Fano lineshape and its linear characteristics can be achieved by tailoring the layers' amount and grating widths so that the proposed structure can be applicable for several optical applications. Moreover, we demonstrate the switching/bistability behaviors of the MDG at Fano resonance which provide a significant switching intensity reduction compared to the established Lorentzian resonant structures.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Hoang TT,Ngo QM,Vu DL,Nguyen HPT

doi

10.1038/s41598-018-34787-9

subject

Has Abstract

pub_date

2018-11-06 00:00:00

pages

16404

issue

1

issn

2045-2322

pii

10.1038/s41598-018-34787-9

journal_volume

8

pub_type

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