Record Details

Surface State Engineering Using Bulk-Band Geometric Phases: Band Inversion and its Observable Implications in One-Dimensional Photonic Crystals

NOPR - NISCAIR Online Periodicals Repository

View Archive Info
 
 
Field Value
 
Title Surface State Engineering Using Bulk-Band Geometric Phases: Band Inversion and its Observable Implications in One-Dimensional Photonic Crystals
 
Creator Gupta, Nitish Kumar
Chopra, Aditi
Kumar, Mukesh
Tiwari, Anjani Kumar
Pal, Sudipta Sarkar
 
Subject Geometric phase
Photonic bandgap
Photonic crystal
Surface impedance
 
Description 560-567
This work comprehensively investigates possibilities of surface states realization in one-dimensional photonic systems
that are terminated with 𝜀-negative and 𝜇-negative bandgap materials. We begin by first fathoming the topological
properties of photonic band structure and notice that its bulk properties completely characterize the surface phenomena in all
the foreseeable cases. This approach is inspired from topologically non-trivial behavior in low-dimensional condensed
matter systems and the ensuing emergence of topologically protected edge states in such systems. Specifically, we will be
following the setup of Su-Schrieffer-Heeger model and emulate the topological phenomena in one-dimensional photonic
systems with a substantial advantage of relatively less demanding fabrication. More importantly, being distributed systems,
the photonic crystal realizations in question further enrich the available parameter space and provide application avenues for
topological phenomena. For example, unlike the atomic chains, in the case of photonic crystals, we can achieve the band
inversion and topological phase transition without altering the arrangement of constituents. Our investigations primarily
focus on exploiting this very aspect of higher-order photonic bandgaps and in this process, we experimentally demonstrate
that the bulk-band geometric phases offer a deterministic yet customizable route for surface state engineering.
 
Date 2023-07-03T10:50:35Z
2023-07-03T10:50:35Z
2023-07
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/62239
https://doi.org/10.56042/ijpap.v61i7.106
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.61(07) [July 2023]