Brillouin zone folding driven bound states in the continuum
University of Electronic Science and Technology of China · Nanyang Technological University · +1 more institution
Abstract
Non-radiative bound states in the continuum (BICs) allow construction of resonant cavities with confined electromagnetic energy and high-quality (Q) factors. However, the sharp decay of the Q factor in the momentum space limits their usefulness for device applications. Here we demonstrate an approach to achieve sustainable ultrahigh Q factors by engineering Brillouin zone folding-induced BICs (BZF-BICs). All the guided modes are folded into the light cone through periodic perturbation that leads to the emergence of BZF-BICs possessing ultrahigh Q factors throughout the large, tunable momentum space. Unlike conventional BICs, BZF-BICs show perturbation-dependent dramatic enhancement of the Q factor in the…
Citation impact
- FWCI
- 27.59
- Percentile
- 100%
- References
- 37
Authors
5- WWWenhao WangCorresponding
University of Electronic Science and Technology of China, Nanyang Technological University
- YKYogesh Kumar Srivastava
Nanyang Technological University, Indian Institute of Technology Hyderabad
- TCThomas Caiwei Tan
Nanyang Technological University
- ZMZhiming M. Wang
University of Electronic Science and Technology of China
- RSRanjan Singh
Nanyang Technological University
Topics & keywords
- Brillouin zone
- Physics
- Position and momentum space
- Photonics
- Quantum mechanics
- Quantum electrodynamics
- Classical mechanics