Nonreciprocal photonic crystal add-drop filter
- THz Technical Research Center of Shenzhen University, Shenzhen 518067 (China)
- College of Electronic and Information Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055 (China)
- Department of Mechanical Engineering, University of Colorado Boulder, Boulder, Colorado 80309 (United States)
We present a versatile add-drop integrated photonic filter (ADF) consisting of nonreciprocal waveguides in which the propagation of light is restricted in one predetermined direction. With the bus and add/drop waveguides symmetrically coupled through a cavity, the four-port device allows each individual port to add and/or drop a signal of the same frequency. The scheme is general and we demonstrate the nonreciprocal ADF with magneto-optical photonic crystals. The filter is immune to waveguide defects, allowing straightforward implementation of multi-channel ADFs by cascading the four-port designs. The results should find applications in wavelength-division multiplexing and related integrated photonic techniques.
- OSTI ID:
- 22392051
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 21 Vol. 105; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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