Emerging intelligent omni-surfaces (IOSs) with 360° electromagnetic radiation significantly improve wireless system performance, while an adversarial IOS also poses a huge risk for physical layer security. Herein...
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ISBN:
(数字)9798350378412
ISBN:
(纸本)9798350378429
Emerging intelligent omni-surfaces (IOSs) with 360° electromagnetic radiation significantly improve wireless system performance, while an adversarial IOS also poses a huge risk for physical layer security. Herein, we propose a “DISCO” IOS (DIOS) based fully-passive jammer (FPJ) that can launch omnidirectional fully-passive jamming attacks, where the interrelated refractive and reflective (R & R) coefficients of the adversarial IOS are randomly generated, acting like a “disco ball”. By introducing active channel aging (ACA) during channel coherence time, the DIOS-based FPJ can perform omnidirectional fully-passive jamming without relying on neither jamming power nor channel knowledge of legitimate users. To characterize the impact of the DIOS-based PFJ, we derive the statistical characteristics of DIOS-jammed channels based on two widely-used IOS models, i.e., the constant-amplitude model and the variable-amplitude model. Numerical results are presented showing that the proposed DIOS-based FPJ can not only perform omnidirectional fully-passive jamming, but also improve the jamming impact by 58.8% at 10 dBm transmit power per legitimate user.
We carry out numerical analysis and physical simulation of scalability and fabrication tolerance for programmable unitary converter, verifying that MSE of around - 20 dB can be achieved for matrix order of 20 and phas...
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Topological quantum optics has endowed integrated quantum devices with novel functionalities, including unidirectional transport and immunity to structural defects. Here we propose topological interfaces that support ...
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Topological quantum optics has endowed integrated quantum devices with novel functionalities, including unidirectional transport and immunity to structural defects. Here we propose topological interfaces that support two distinct edge modes with different frequency ranges. The nonlinear four-wave mixing processes in the topological interfaces lead to the generation of signal and idler photons, each corresponding to distinct edge modes. By designing a diamondlike topological structure, we can couple the signal and idler photons into opposite branches, leading to spatial separation of the photon pairs. This behavior enables on-chip generation and flexible control of the topological biphoton states. More importantly, the biphoton states are inborn topologically protected, showing robustness against sharp bends and disorders. Our proposal offers the possibility of robust, multifunctional topological quantum devices, which may find applications in quantum information processing.
A Lidar system based on lens assisted integrated two-dimension beam steering at 1550 nm is utilized in frequency-modulated continuous wave ranging. This Lidar system has 4×4 scanning directions and 80 m ranging d...
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We present a solid-state light detection and ranging system with a hybrid beam-steering technology. A blind zone-suppressed TOF Lidar is demonstrated with a field of view of 0.9°×8.1°and a resolution po...
We theoretically study the graphene-ribbon plasmonic metasurface with a metal reflective layer in the mid-infrared regime. The results show a 320°phase modulation range with the reflectivity of over 80% at a mid-...
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We demonstrate a hybrid integrated frequency-modulated continuous-wave laser on a Si-Si3N4 dual-layer platform with 21.9 mW output power, >56.5 dB side mode suppression ratio, >100 nm tuning range, and 895 Hz in...
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We report a single-frequency dual-cavity laser on the Er:LNOI platform. Facilitated by the Vernier effect and gain competition, the output single-frequency signal light has a power of 0.31 μW and an SMSR of 31 dB. &#...
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A time-interleaved parallel pruning neural-network equalizer is proposed and implemented on FPGA for 100-Gbps PAM-4 optical interconnects, demonstrating over 55% and 40% hardware resource reduction for single and 8-ch...
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In this work, we presented directional couplers with wideband flat coupling-ratio and a microring resonator with wideband uniform extinction-ratio (ER) based on artificial-gaugefield optimization. Proof-of-concept res...
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ISBN:
(数字)9798350394047
ISBN:
(纸本)9798350394054
In this work, we presented directional couplers with wideband flat coupling-ratio and a microring resonator with wideband uniform extinction-ratio (ER) based on artificial-gaugefield optimization. Proof-of-concept results are obtained on SOI and SiN platforms, with 0.9dB coupling-ratio variation and 1.6dB ER variation over 100nm bandwidth.
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