Visual observation of optical Floquet-Bloch oscillations
arXiv:2212.14213 · doi:10.1038/s41377-024-01419-z
Abstract
Bloch oscillations, an important transport phenomenon, have extensively been studied in static systems but remain largely unexplored in Floquet systems. Here, we propose a new type of Bloch oscillations, namely the "Floquet-Bloch oscillations," which refer to rescaled Bloch oscillations with a period of extended least common multiple of the modulation and Bloch periods. We report the first visual observation of such Floquet-Bloch oscillations in femtosecond-laser-written waveguide arrays by using waveguide fluorescence microscopy. These Floquet-Bloch oscillations exhibit exotic properties, such as fractal spectrum and fractional Floquet tunneling. This new transport mechanism offers an intriguing method of wave manipulation, which has significant applications in coherent quantum transport.
18 pages, 4 figures
References in corpus (8)
- Observation of photon-assisted tunneling in optical lattices
- Fractional Bloch oscillations in photonic lattices
- Photonic Floquet topological insulators in a fractal lattice
- Acoustic Analogue of Bloch Oscillations and Resonant Zener Tunneling in Ultrasonic Superlattices
- Generalized acceleration theorem for spatiotemporal Bloch waves
- Floquet superradiance lattices in thermal atoms
- Floquet band engineering with Bloch oscillations
- Experimental Quantum Simulation of Dynamic Localization on Curved Photonic Lattices