Collective excitations of a bound-in-the-continuum condensate
Abstract
Spectra of low-lying elementary excitations are critical to characterize properties of bosonic quantum fluids. Usually these spectra are difficult to observe, due to low occupation of non-condensate states compared to the ground state. Recently, low-threshold Bose-Einstein condensation was realised in a symmetry-protected bound state in the continuum, at a saddle point, thanks to coupling of this electromagnetic resonance to semiconductor excitons. While it has opened the door to long-living polariton condensates, their intrinsic collective properties are still unexplored. Here we unveil the peculiar features of the Bogoliubov spectrum of excitations in this system. Thanks to the dark nature of the bound-in-the-continuum state, collective excitations lying directly above the condensate become observable in enhanced detail. We reveal interesting aspects, such as energy-flat parts of the dispersion characterized by two parallel stripes in photoluminescence pattern, pronounced linearization at non-zero momenta in one of the directions, and a strongly anisotropic velocity of sound.
- Authors:
-
[1];
[2];
[3];
[4];
[4];
[4];
[4];
[1]
- Moscow Engineering Physics Institute, Moscow (Russia)
- University of Salento, Lecce (Italy); CNR Nanotec, Institute of Nanotechnology, Lecce (Italy)
- CNR Nanotec, Institute of Nanotechnology, Lecce (Italy); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry
- CNR Nanotec, Institute of Nanotechnology, Lecce (Italy)
- Princeton University, NJ (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Russian Foundation for Basic Research (RFBR); MEPhI Priority 2030 Program; Foundation for the Advancement of Theoretical Physics and Mathematics; Italian Ministry of University (MIUR); Gordon and Betty Moore Foundation; National Science Foundation (NSF)
- OSTI Identifier:
- 2205179
- Grant/Contract Number:
- AC02-05CH11231; 20-52-7816; 2017P9FJBS; GBMF9615; DMR 1420541
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 14; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Grudinina, Anna, Efthymiou-Tsironi, Maria, Ardizzone, Vincenzo, Riminucci, Fabrizio, Giorgi, Milena De, Trypogeorgos, Dimitris, Baldwin, Kirk, Pfeiffer, Loren, Ballarini, Dario, Sanvitto, Daniele, and Voronova, Nina. Collective excitations of a bound-in-the-continuum condensate. United States: N. p., 2023.
Web. doi:10.1038/s41467-023-38939-y.
Grudinina, Anna, Efthymiou-Tsironi, Maria, Ardizzone, Vincenzo, Riminucci, Fabrizio, Giorgi, Milena De, Trypogeorgos, Dimitris, Baldwin, Kirk, Pfeiffer, Loren, Ballarini, Dario, Sanvitto, Daniele, & Voronova, Nina. Collective excitations of a bound-in-the-continuum condensate. United States. https://doi.org/10.1038/s41467-023-38939-y
Grudinina, Anna, Efthymiou-Tsironi, Maria, Ardizzone, Vincenzo, Riminucci, Fabrizio, Giorgi, Milena De, Trypogeorgos, Dimitris, Baldwin, Kirk, Pfeiffer, Loren, Ballarini, Dario, Sanvitto, Daniele, and Voronova, Nina. Mon .
"Collective excitations of a bound-in-the-continuum condensate". United States. https://doi.org/10.1038/s41467-023-38939-y. https://www.osti.gov/servlets/purl/2205179.
@article{osti_2205179,
title = {Collective excitations of a bound-in-the-continuum condensate},
author = {Grudinina, Anna and Efthymiou-Tsironi, Maria and Ardizzone, Vincenzo and Riminucci, Fabrizio and Giorgi, Milena De and Trypogeorgos, Dimitris and Baldwin, Kirk and Pfeiffer, Loren and Ballarini, Dario and Sanvitto, Daniele and Voronova, Nina},
abstractNote = {Spectra of low-lying elementary excitations are critical to characterize properties of bosonic quantum fluids. Usually these spectra are difficult to observe, due to low occupation of non-condensate states compared to the ground state. Recently, low-threshold Bose-Einstein condensation was realised in a symmetry-protected bound state in the continuum, at a saddle point, thanks to coupling of this electromagnetic resonance to semiconductor excitons. While it has opened the door to long-living polariton condensates, their intrinsic collective properties are still unexplored. Here we unveil the peculiar features of the Bogoliubov spectrum of excitations in this system. Thanks to the dark nature of the bound-in-the-continuum state, collective excitations lying directly above the condensate become observable in enhanced detail. We reveal interesting aspects, such as energy-flat parts of the dispersion characterized by two parallel stripes in photoluminescence pattern, pronounced linearization at non-zero momenta in one of the directions, and a strongly anisotropic velocity of sound.},
doi = {10.1038/s41467-023-38939-y},
journal = {Nature Communications},
number = 1,
volume = 14,
place = {United States},
year = {Mon Jun 12 00:00:00 EDT 2023},
month = {Mon Jun 12 00:00:00 EDT 2023}
}
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