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oe1(光电查) - 科学论文

14 条数据
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  • Applied Nanophotonics || Photonic circuitry

    摘要： The photonic crystal paradigm offers a new generation of compact waveguides, splitters, and demultiplexers. Coupling of waveguides with microcavities enables further uses, including electro-optical and all-optical switching. These ideas and their experimental implementations are the subject of this chapter. Problems on the way toward efficient integration of photonic and electronic devices and issues related to compatibility with the major platforms (InP platform photonics and Si platform) are discussed as well. Because of the complicated calculations involved in photonic circuitry modeling and complex interplay of many physical and technological issues, the discussion is kept at the conceptual level to highlight the basic principal approaches, physical phenomena involved, and ideas, without diving into detail.

    关键词： waveguides,photonic crystal,splitters,photonic circuitry,all-optical switching,demultiplexers,electro-optical switching

    更新于2025-09-09 09:28:46

  • Hourglass nonlinear photonic crystal cavity for ultra-fast all-optical switching

    摘要： In this paper, a new design of an ultra fast all optical switch based on a new photonic crystal cavity combined with Kerr effect is proposed and its performance is studied. Numerical methods such as plane wave expansion (PWE) and finite difference time domain (FDTD) are used to perform simulations and study the optical properties of the proposed switch. Switching from ON to OFF status occurred when the resonant wavelength is shifted due to Kerr effect. The simulation results show that switch has a high-speed response of ~15ps and since it has an ultra-small size of 273.24 μm2, it has a potential to be used in integrated optical-circuits.

    关键词： All-optical switching,Finite-Difference Time-Domain method,Optical Kerr effect,Photonic crystal cavity

    更新于2025-09-09 09:28:46

  • [IEEE 2018 20th International Conference on Transparent Optical Networks (ICTON) - Bucharest (2018.7.1-2018.7.5)] 2018 20th International Conference on Transparent Optical Networks (ICTON) - Fano Resonances for Realizing Compact and Low Energy Consumption Photonic Switches

    摘要： We present our recent experimental work involving nanocavities which enable efficient light-matter interaction in small optical mode volumes. To achieve this, we investigated photonic crystal membrane platforms for designing high-quality (Q) factor nanocavities and efficient planar waveguides. Particularly, we discuss waveguide-nanocavity coupled systems for realization of asymmetric Fano resonances which are characterized by having transmission maximum and minimum in close spectral separation (~ 1 nm) suitable for optical switching applications.

    关键词： nonlinear optics,Fano resonances,photonic crystals,all-optical switching

    更新于2025-09-09 09:28:46

  • MAXWELL STRESS INDUCED FLOW-DEFORMATION AND OPTICAL NONLINEARITIES IN LIQUID CRYSTALS (Invited Paper)

    摘要： We present a critical account of intense pulsed-laser ?eld induced refractive index changes caused by ?ow, crystalline axis reorientation and distortion and other high order photonic processes in transparent liquid crystals. In particular, the optical nonlinearity associated with Maxwell Stress induced ?ow-reorientation in nematic liquid crystals is explicitly calculated, and their possibility for all-optical switching application is experimentally demonstrated. Similar ?ows processes have also been observed in Blue-Phase liquid crystals with nanosecond and picosecond pulsed-lasers.

    关键词： all-optical switching,liquid crystals,optical nonlinearities,Blue-Phase liquid crystals,nematic liquid crystals,Maxwell Stress

    更新于2025-09-04 15:30:14