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oe1(光电查) - 科学论文

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?? 中文（中国） ▾

  • Enhanced nonlinear optical properties of LiNbO3 crystal embedded with CuZn alloy nanoparticles by ion implantation

    摘要： LiNbO3 crystal, as a typical nonlinear optical material, has attracted considerable interest in photonic device applications. However, LiNbO3 shows weak nonlinear optical responses due to its low laser damage threshold. Herein, the optical nonlinearities of LiNbO3 are enhanced by inducing CuZn alloy nanoparticles (NPs). The structural and optical properties of LiNbO3 with embedded NPs were investigated in detail. The third-order nonlinear susceptibilities of CuZn: LiNbO3 nanocomposites exhibit nearly 4 orders of magnitude greater than the untreated LiNbO3 due to the localized surface plasmon resonance effect. Furthermore, the nanocomposites suffer conversion from reverse-saturable absorption to saturable absorption compared with the pure LiNbO3. This feature makes the nanocomposites a potential saturable absorber leading to the realization of efficient pulse lasers.

    关键词： Ion implantation,Optical nonlinearities,CuZn alloy nanoparticles,Nonlinear materials

    更新于2025-09-23 15:23:52

  • Giant Ultrafast Optical Nonlinearities of Annealed Sb2Te3 Layers

    摘要： The optimization of thin Sb2Te3 films in order to obtain giant ultrafast optical nonlinearities is reported. The ultrafast nonlinearities of the thin film layers are studied by the Z-scan technique. Giant saturable absorption is obtained, which is the highest ever reported, by means of the Z-scan technique.

    关键词： Sb2Te3,Z-scan technique,ultrafast optical nonlinearities,saturable absorption

    更新于2025-09-23 15:19:57

  • Controlled-Phase Gate Using Dynamically Coupled Cavities and Optical Nonlinearities

    摘要： We show that relatively simple integrated photonic circuits have the potential to realize a high fidelity deterministic controlled-phase gate between photonic qubits using bulk optical nonlinearities. The gate is enabled by converting travelling continuous-mode photons into stationary cavity modes using strong classical control fields that dynamically change the effective cavity-waveguide coupling rate. This architecture succeeds because it reduces the wave packet distortions that otherwise accompany the action of optical nonlinearities [J. Shapiro, Phys. Rev. A 73, 062305 (2006); J. Gea-Banacloche, Phys. Rev. A 81, 043823 (2010)]. We show that high-fidelity gates can be achieved with self-phase modulation in χ(3) materials as well as second-harmonic generation in χ(2) materials. The gate fidelity asymptotically approaches unity with increasing storage time for an incident photon wave packet with fixed duration. We also show that dynamically coupled cavities enable a trade-off between errors due to loss and wave packet distortion. Our proposed architecture represents a new approach to practical implementation of quantum gates that is room-temperature compatible and only relies on components that have been individually demonstrated.

    关键词： optical nonlinearities,integrated photonic circuits,photonic qubits,quantum gates,controlled-phase gate

    更新于2025-09-19 17:13:59

  • [IEEE 2019 IEEE Research and Applications of Photonics in Defense Conference (RAPID) - Miramar Beach, FL, USA (2019.8.19-2019.8.21)] 2019 IEEE Research and Applications of Photonics in Defense Conference (RAPID) - Quantum Yield Measurement of Organometallic Complexes using Double Pump Probe Technique

    摘要： The abstract of the paper is not provided in the given text.

    关键词： Nonlinear optics,optical nonlinearities in optical Materials,Nonlinear optical Material

    更新于2025-09-16 10:30:52

  • [IEEE 2019 21st International Conference on Transparent Optical Networks (ICTON) - Angers, France (2019.7.9-2019.7.13)] 2019 21st International Conference on Transparent Optical Networks (ICTON) - A Materials Approach Toward the Mitigation of Nonlinearities in Glass Optical Fibers

    摘要： Power scaling in high energy fiber-based laser systems is limited by optical nonlinearities. As opposed to the complex micro-structured large mode area (LMA) fibers typically developed to mitigate these parasitic nonlinear effects, the present work instead advocates another approach, a material approach, in which nonlinearities are mitigated through a judicious choice of dopants in the fiber core. To demonstrate the effectiveness of this approach, multicomponent core – silica glass cladding optical fibers are fabricated using the molten core method and the role played by the glass dopants in the mitigation of nonlinearities discussed. More specifically, highlights are made on multicomponent alkaline-earth (Sr, Ca) doped-silica fibers exhibiting concomitant reduction of > 6 dB in the Brillouin gain coefficient, 1 – 2 dB in the Raman gain coefficient, and 2 – 3 dB in the thermo-optic coefficient relative to conventional silica fibers.

    关键词： Brillouin scattering,Raman scattering,optical nonlinearities,optical fibers,multicomponent silicates,glass

    更新于2025-09-11 14:15:04

  • 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