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Ultralow-power on-chip all-optical Fano diode based on uncoupled nonlinear photonic-crystal nanocavities.
- Source :
-
Journal of Optics . Mar2018, Vol. 20 Issue 3, p1-1. 1p. - Publication Year :
- 2018
-
Abstract
- We achieved an ultralow-power Fano-like diode in integrated photonic circuits through two cascaded and uncoupled photonic-crystal microcavities, coated with a nonlinear layer constructed from polycrystalline indium-tin oxide doped with gold nanoparticles. The multicomponent nanocomposite layer helps to obtain an extremely large nonlinearity enhancement on account of the quantum confinement effect, hot-electron injection, and local-field enhancement effect. Thus, the strong nonlinearity enhancement, asymmetric Fano-like spectrum lineshape, and asymmetric light confinement for the forward and backward incidence cases guarantee the nonreciprocal transmission of signal light. A compact size of 7 μm is maintained for the photonic-crystal microcavities and the transmission contrast reached 15 dB. Besides, we achieved 1.5 kW cm−2 operating threshold intensity (cut down by a thousand times). This work assists chip-integrated optical computing on the basis of nonlinear photonic-crystal microcavities. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20408978
- Volume :
- 20
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Optics
- Publication Type :
- Academic Journal
- Accession number :
- 128225340
- Full Text :
- https://doi.org/10.1088/2040-8986/aaa796