Loughborough University
Browse
THz cavity-QED with hybrid Si-BSCCO_24112022___KD.pdf (1.12 MB)

Engineering ultrastrong coupling between Josephson plasmon polaritons and subwavelength microcavity arrays in silicon/van der Waals layered superconductor heterostructure for terahertz hybrid circuit cavity quantum electrodynamics

Download (1.12 MB)
journal contribution
posted on 2023-02-14, 13:36 authored by Samane Kalhor, Sergey SavelievSergey Saveliev, Kaveh Delfanazari

The realization of the ultrastrong coupling between Josephson plasma waves (JPWs) and terahertz (THz) photons in the subwavelength microcavity array is of interest for manipulating the THz cavity quantum electrodynamics (cQED), ultrahigh-resolution sensing and imaging, and quantum information processing. Here, we describe the engineering of ultrastrong light-matter interactions in a deeply subwavelength microcavity array based on the hybrid silicon and high-temperature superconductor (HTS) Bi2Sr2CaCu2O8+δ (BSCCO) van der Waals (vdW) heterostructure. We perform numerical modeling and analytical calculation to describe Josephson THz cQED and the ultrastrong coupling process between THz radiation and the JPWs in Josephson medium which is naturally present in BSCCO vdW. The resonance frequency of microcavities is swept through the Josephson plasma frequency by altering their width. THz reflection demonstrates the anticrossing behavior of ultrastrong coupling with a normalized Rabi frequency (coupling strength) 2ωR/fc=0.29 for the BSCCO thickness t=200 nm, which increases to the value of 0.87 for t=800 nm. Furthermore, the thermal behavior of coupling strength shows modulation of Rabi splitting 2ωR with temperature. We show that the normalized Rabi splitting 2ωR/fc is independent of the temperature in the BSCCO superconducting regime, while a weak coupling can be observed above the superconducting transition temperature. The proposed chip-scale THz photonic integrated circuit with subwavelength microcavity metamaterial array shall guide the effort in the development of power-efficient coherent THz sources, quantum sensors, ultrasensitive detectors, parametric amplifiers and tunable bolometers based on BSCCO HTS quantum material.

Funding

EPSRC summer school studentship

Royal Society Grant No. RGS\R2\222168

History

School

  • Science

Department

  • Physics

Published in

Physical Review B

Volume

106

Issue

24

Publisher

American Physical Society

Version

  • AM (Accepted Manuscript)

Rights holder

© American Physical Society

Publisher statement

This paper was accepted for publication in the journal Physical Review B and the definitive published version is available at https://doi.org/10.1103/physrevb.106.245140

Acceptance date

2022-11-21

Publication date

2022-12-23

Copyright date

2022

ISSN

2469-9950

eISSN

2469-9969

Language

  • en

Depositor

Prof Sergey Saveliev. Deposit date: 13 February 2023

Article number

245140

Usage metrics

    Loughborough Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC