Unidirectional Photonic Circuit with Phase-Change Fano Resonator
| Autor: | Tsampikos Kottos, Ilya Vitebskiy, Roney Thomas, Eleana Makri, Boris Shapiro |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
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FOS: Physical sciences 02 engineering and technology Applied Physics (physics.app-ph) 01 natural sciences Asymmetry law.invention Resonator Computer Science::Hardware Architecture law 0103 physical sciences 010306 general physics media_common Physics business.industry Fano resonance Physics - Applied Physics 021001 nanoscience & nanotechnology Critical value Light intensity Transmission (telecommunications) Optoelectronics Photonics 0210 nano-technology business Waveguide Optics (physics.optics) Physics - Optics |
| Popis: | We demonstrate that the integration of a phase-change material (PCM) in one of the two microresonators of a photonic metamolecule, coupled to a bus waveguide, can lead to unidirectional Fano resonances and to the emergence of a unidirectional transmission window. The phase change is caused by light-induced heating and is accompanied by an abrupt increase in the extinction coefficient of the PCM resonator. Due to the photonic circuit asymmetry, the critical value of the input light intensity triggering the phase change is strongly dependent on the input light direction. The latter determines the unidirectional nature of the emerging transmission window. This effect can be utilized in on-chip magnetic-free isolators and Q-switches. |
| Databáze: | OpenAIRE |
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