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Dynamic band structure measurement in the synthetic space
Guangzhen Li1, Yuanlin Zheng1, Avik Dutt2
1State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
Science Advances
|February 1, 2021
Summary
Scientists experimentally measured dynamic band structure in synthetic dimensions using ring resonators. This offers new insights into solid-state and photonic physics and band structure engineering.
Area of Science:
- Solid-state physics
- Photonics
- Quantum mechanics
Background:
- Band structure theory is crucial for understanding solid-state and photonic systems.
- Dynamic modulation in synthetic dimensions offers novel ways to explore physical phenomena.
Purpose of the Study:
- To experimentally measure the dynamic band structure in a synthetic space.
- To investigate the evolution of wave vectors in a frequency-based synthetic lattice.
- To demonstrate the utility of synthetic dimensions in fundamental physics and engineering.
Main Methods:
- Utilized a ring resonator with near-resonant dynamic modulation.
- Implemented a synthetic lattice incorporating the frequency axis of light.
- Employed a continuous wave source with frequency scanning to excite and measure band trajectories.
Main Results:
- Successfully demonstrated direct experimental measurement of dynamic band structure.
- Observed the evolution of wave vectors reciprocal to the frequency axis.
- Validated the analogy to a one-dimensional lattice under external force.
Conclusions:
- The study provides a novel perspective on exploring dynamics in fundamental physics using synthetic dimensions.
- The experimental method enables significant capabilities in band structure engineering for photonic systems.
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