Bloch oscillations in photonic spectral lattices through phase-mismatched four-wave mixing
| Autor: | Peixiang Lu, Chengzhi Qin, Tianwen Han, Bing Wang, Wenwan Li, Hao Chen |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Photon business.industry Scattering Physics::Optics Bragg's law 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 010309 optics Four-wave mixing Optics Amplitude Lattice (order) 0103 physical sciences Bloch oscillations Photonics 0210 nano-technology business |
| Zdroj: | Optics Letters. 44:5430 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.44.005430 |
| Popis: | Here we investigate the Bloch oscillations (BOs) in a photonic spectral lattice created with four-wave mixing Bragg scattering (FWM-BS). By injecting a signal and two pumps with different frequencies into a silicon nitride waveguide, a spectral lattice can be created for the generated idlers through successive FWM-BS. The phase-mismatch during FWM-BS acts as an effective force that induces BOs in the spectral lattice. Both the oscillation period and amplitude are determined by the magnitude of the effective force. With cascaded FWM-BS processes, the spectrum of idlers experiences a directional shift as the phase differences of pumps are modulated. Additionally, introducing long-range couplings in the spectral lattice will change the trajectory of BOs within each period. The pattern of BOs for a single frequency input can also be tailored. This Letter provides a new platform to realize BOs in the frequency dimension and paves a promising way for broadband frequency control with all-optical schemes. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|