Experimental probe of twist angle–dependent band structure of on-chip optical bilayer photonic crystal
Abstract
Recently, twisted bilayer photonic materials have been extensively used for creating and studying photonic tunability through interlayer couplings. While twisted bilayer photonic materials have been experimentally demonstrated in microwave regimes, a robust platform for experimentally measuring optical frequencies has been elusive. Here, we demonstrate the first on-chip optical twisted bilayer photonic crystal with twist angle–tunable dispersion and great simulation-experiment agreement. Our results reveal a highly tunable band structure of twisted bilayer photonic crystals due to moiré scattering. This work opens the door to realizing unconventional twisted bilayer properties and novel applications in optical frequency regimes.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 14, 2023
- Source ID
- 10.1126/sciadv.adh8498
Entities
People
- Beicheng Lou
- Eric Mazur
- Fan Du
- Haoning Tang
- Mingjie Zhang
- Rebekah Jin
- Shanhui Fan
- Weijie Xu
- Xueqi Ni
Organizations
- Harvard University
- Stanford University
- University of California