Work

Longitudinal optical phonons in photonic time crystals containing a stationary charge

Year: 2024

Type: article

Abstract: Photonic time crystals (PTCs) enable exotic light-matter interactions but typically require significant modulation strength to open a wide momentum band gap, limiting their practical realization. Here, the authors demonstrate that a Lorentzian medium-based PTC with a stationary charge cannot only excite but also amplify longitudinal optical phonons, with a band gap spanning the entire momentum space. This infinite momentum band gap can be achieved with a minimal modulation depth, enriching time-varying photonics by incorporating the distinct wave characteristics of longitudinal excitations.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.110.l100306

Authors: Sihao Zhang, Junhua Dong, Huanan Li, Jingjun Xu, Boris Shapiro

Institutions: Nankai University, Technion – Israel Institute of Technology

Language: English

Topic: Photonic Crystals and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities

Awards: G1471658827, G2243887483, G5535594252, G6752454409