Topologically protected frequency control of broadband signals in dynamically modulated waveguide arrays
arXiv:2111.13574 · doi:10.1103/PhysRevA.105.053519
Abstract
We theoretically propose a synthetic frequency dimension scheme to control the spectrum of a light beam propagating through an array of evanescently coupled waveguides modulated in time by a propagating sound wave via the acousto-optical effect. Configurations are identified where the emerging two-dimensional synthetic space-frequency lattice displays a non-trivial topological band structure. The corresponding chiral edge states can be exploited to manipulate the frequency spectrum of an incident beam in a robust way. In contrast to previous works, our proposal is not based on discrete high-Q cavity modes, which paves the way to the manipulation of broadband signals.
arXiv comment23 pages, 6 figures
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- A comprehensive review on developments of synthetic dimensions
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- Artificial gauge fields in the t-z mapping for optical pulses: spatio-temporal wavepacket control and quantum Hall physics
- Topology in a one-dimensional plasmonic crystal
- Tailoring quantum walks in integrated photonic lattices
- Synthetic-lattice Bloch wave dynamics in a single-mode microwave resonator