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Strong Coupling Dynamics of a Quantum Emitter near a Topological Insulator Nanoparticle

التفاصيل البيبلوغرافية
العنوان: Strong Coupling Dynamics of a Quantum Emitter near a Topological Insulator Nanoparticle
المؤلفون: Ioannis Thanopulos, Vassilios Yannopapas, Emmanuel Paspalakis
المصدر: Nanomaterials, Vol 13, Iss 2787, p 2787 (2023)
بيانات النشر: MDPI AG
سنة النشر: 2023
المجموعة: Directory of Open Access Journals: DOAJ Articles
مصطلحات موضوعية: spontaneous emission, topological insulator, two-level quantum system, Purcell effect, strong coupling, non-Markovianity measure, Chemistry, QD1-999
الوصف: We study the spontaneous emission dynamics of a quantum emitter near a topological insulator Bi 2 Se 3 spherical nanoparticle. Using the electromagnetic Green’s tensor method, we find exceptional Purcell factors of the quantum emitter up to 10 10 at distances between the emitter and the nanoparticle as large as half the nanoparticle’s radius in the terahertz regime. We study the spontaneous emission evolution of a quantum emitter for various transition frequencies in the terahertz and various vacuum decay rates. For short vacuum decay times, we observe non-Markovian spontaneous emission dynamics, which correspond perfectly to values of well-established measures of non-Markovianity and possibly indicate considerable dynamical quantum speedup. The dynamics turn progressively Markovian as the vacuum decay times increase, while in this regime, the non-Markovianity measures are nullified, and the quantum speedup vanishes. For the shortest vacuum decay times, we find that the population remains trapped in the emitter, which indicates that a hybrid bound state between the quantum emitter and the continuum of electromagnetic modes as affected by the nanoparticle has been formed. This work demonstrates that a Bi 2 Se 3 spherical nanoparticle can be a nanoscale platform for strong light–matter coupling.
نوع الوثيقة: article in journal/newspaper
اللغة: English
تدمد: 2079-4991
Relation: https://www.mdpi.com/2079-4991/13/20/2787; https://doaj.org/toc/2079-4991; https://doaj.org/article/7d0feafea51b420ca4725bd98f878307
DOI: 10.3390/nano13202787
الاتاحة: https://doi.org/10.3390/nano13202787
https://doaj.org/article/7d0feafea51b420ca4725bd98f878307
رقم الانضمام: edsbas.DF72377A
قاعدة البيانات: BASE
الوصف
تدمد:20794991
DOI:10.3390/nano13202787