Abstract

We study the spontaneous emission (SPEM) for a quantum emitter (QUEM) near a topological insulator Bi₂Se₃ nanosphere. We calculate numerically the QUEM Purcell factor near nanospheres of radii between 40 nm and 100 nm, with and without taking into account the topologically protected delocalized states at the surface of the nanosphere. We find exceptionally large Purcell factors up to 10¹⁰ at distances between the QUEM and the nanosphere as large as half its radius in the terahertz regime. By computing the SPEM dynamics for a QUEM with transition frequencies in the terahertz and free-space decay rates in the nanosecond to millisecond range, we observe intense reversible dynamics, as well as population trapping effects. This work demonstrates that a Bi₂Se₃ nanosphere provides the conditions for strong light–matter interaction at the nanoscale in the terahertz regime.

© 2022 Optica Publishing Group

Strong light–matter interactions of exciton in bulk WS₂ and a toroidal dipole resonance

Shaojun You, Ying Zhang, Menghui Fan, Shengyun Luo, and Chaobiao Zhou
Opt. Lett. 48(6) 1530-1533 (2023)

Effective pulse reverse-engineering for strong field–matter interaction

Du Ran, Bin Zhang, Ye-Hong Chen, Zhi-Cheng Shi, Yan Xia, Reuven Ianconescu, Jacob Scheuer, and Avraham Gover
Opt. Lett. 45(13) 3597-3600 (2020)

Nonlabeled detection of specific intermolecular bondings by terahertz surface plasmon resonance of topological insulator

Hinano Sugimoto and Hitoshi Tabata
Opt. Lett. 46(16) 3897-3900 (2021)

Designing concentric nanoparticles for surface-enhanced light-matter interaction in the mid-infrared

Iryna Khodasevych, Patrick Rufangura, and Francesca Iacopi
Opt. Express 30(13) 24118-24131 (2022)

Topological edge states of a long-range surface plasmon polariton at the telecommunication wavelength

Ran Gladstein Gladstone, Sukrith Dev, Jeffery Allen, Monica Allen, and Gennady Shvets
Opt. Lett. 47(17) 4532-4535 (2022)