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High-order dynamic localization and tunable temporal cloaking in ac-electric-field driven synthetic lattices
Shulin Wang1,2, Chengzhi Qin1,2, Weiwei Liu1,2
1Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, China.
Nature Communications
|December 10, 2022
Summary
Researchers achieved high-order dynamic localization (DL) of photons in synthetic time dimensions, overcoming previous limitations. This breakthrough enables robust light confinement and novel applications like tunable temporal cloaking.
Area of Science:
- Quantum optics
- Condensed matter physics
- Photonics
Background:
- Dynamic localization (DL) offers an alternative to Anderson localization for coherent light confinement.
- Previous demonstrations of DL were limited to low orders due to bending losses in waveguide lattices.
- The Dunlap-Kenkre model describes DL using a synthetic ac-electric field, often mimicked by lattice curvature.
Purpose of the Study:
- To overcome the limitations of weak-field DL and achieve high-order dynamic localization.
- To explore the use of synthetic time dimensions for realizing higher-order DL.
- To investigate the properties and potential applications of high-order DL.
Main Methods:
- Transferring lattice concepts from spatial to synthetic time dimensions.
- Utilizing fiber-loop circuits to create synthetic time lattices.
- Observing and analyzing dynamic localization phenomena up to the fifth order.
Main Results:
- Successfully observed up to fifth-order dynamic localization.
- Demonstrated that high-order DL exhibits superior localization and robustness against noise compared to low-order DL.
- Developed a tunable temporal cloaking scheme by combining low- and high-order DL.
Conclusions:
- High-order dynamic localization can be achieved in synthetic time dimensions, breaking the weak-field limitation.
- Synthetic lattice schemes provide a promising platform for exploring high-order DL.
- The demonstrated temporal cloaking scheme highlights the potential of high-order DL in signal processing and protection.
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