Design of Graded Topological Resonator for Sensitivity Improvement

Amit Kumar Goyal, Diptimayee Dash, Jasmine Saini, Yehia Massoud*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In this paper, a hyperbolic-graded topological nanophotonic resonator is proposed to excite topologically protected edge states (TES). The index grading is introduced to modify the dispersion characteristics and enhance the mode field confinement of TES. The optimized structure leads to the excitation of a TES at a 1521nm operating wavelength. Further, the structural capability of the refractive index sensor is demonstrated. The analytical results demonstrate a sensitivity of 1806 nm/RIU (with a refractive index range from 1.35 to 1.40). Thus, showing its potential to detect and sense various biochemical analytes accurately.

Original languageEnglish (US)
Title of host publicationOptoelectronic Devices and Integration XII
EditorsXuping Zhang, Baojun Li, Changyuan Yu, Xinliang Zhang
ISBN (Electronic)9781510667778
StatePublished - 2023
EventOptoelectronic Devices and Integration XII 2023 - Beijing, China
Duration: Oct 14 2023Oct 16 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOptoelectronic Devices and Integration XII 2023

Bibliographical note

Publisher Copyright:
© 2023 SPIE.


  • Biosensor
  • Graded Refractive Index
  • Photonic Crystal
  • Resonator

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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