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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Non-volatile silicon photonic devices enabled by phase change material
摘要： We review our recent research progress on silicon-Ge2Sb2Te5 hybrid photonic devices. The optical transmission can be varied by 20 dB using micron-length GST. The inherent "self-holding" feature of GST make it attractive for low-power applications.
关键词： silicon photonics,optical memory,microring resonator,optical switch
更新于2025-09-16 10:30:52
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Fast 3D movement of a laser focusing spot behind scattering media by utilizing optical memory effect and optical conjugate planes
摘要： Controlling light propagation intentionally through turbid media such as ground glass or biological tissue has been demonstrated for many useful applications. Due to random scattering effect, one of the important goals is to draw a desired shape behind turbid media with a swift and precise method. Feedback wavefront shaping method which is known as a very effective approach to focus the light, is restricted by slow optimization process for obtaining multiple spots. Here we propose a technique to implement feedback wavefront shaping with optical memory effect and optical 4f system to speedy move focus spot and form shapes in 3D space behind scattering media. Starting with only one optimization process to achieve a focusing spot, the advantages of the optical configuration and full digital control allow us to move the focus spot with high quality at the speed of SLM frame rate. Multiple focusing spots can be achieved simultaneously by combining multiple phase patterns on a single SLM. By inheriting the phase patterns in the initial focusing process, we can enhance the intensity of the focusing spot at the edge of memory effect in with 50% reduction in optimization time. With a new focusing spot, we have two partially overlapped memory effect regions, expanding our 3D scanning range. With fast wavefront shaping devices, our proposed technique could potentially find appealing applications with biological tissues.
关键词： optical memory effect,biological tissues,turbid media,3D space,light propagation,feedback wavefront shaping
更新于2025-09-16 10:30:52
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Optically controlled field effect transistors based on photochromic spiropyran and fullerene C60 films
摘要： Optically controlled organic field effect transistors containing a binary mixture of fullerene C60 (n-semiconductor) and spiropyran (photoresponsive conductivity modulator) as the active layer were designed and fabricated. The obtained transistors demonstrated higher transfer characteristics (source-drain current), charge carrier mobility in the active layer, and response rate to an external influence than the multilayer transistor (wherein these semiconductor and photo responsive material are in different layers), which makes them promising candidates for the design of optical memory elements.
关键词： Optically controlled field effect transistors,photochromic spiropyran,fullerene C60,optical memory elements
更新于2025-09-12 10:27:22