Ruohu Zhang
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View article: Dual-state six-channel polarization multiplexing in reconfigurable metasurfaces
Dual-state six-channel polarization multiplexing in reconfigurable metasurfaces Open
Dynamically tunable metasurfaces based on phase-change materials (PCMs) have become important platforms for realizing reconfigurable optical systems. Nevertheless, achieving multiple independent functionalities within a single device, part…
View article: Anomalous optical gradient force induced by polarization-tuned antisymmetry in energy density gradient
Anomalous optical gradient force induced by polarization-tuned antisymmetry in energy density gradient Open
The spatial inhomogeneity of electromagnetic energy density in an optical field typically gives rise to conservative gradient forces, which serve as the fundamental mechanism for trapping nanoparticles in optical tweezers. Surprisingly, ho…
View article: Silicon-based Tubular Micromotor with SERS Traceability and Magnetic–Thermal Dual Responsiveness
Silicon-based Tubular Micromotor with SERS Traceability and Magnetic–Thermal Dual Responsiveness Open
The synergistic strategy based on magnetic hyperthermia and free radical therapy demonstrates tremendous potential in inducing effective tumor cell death. Therefore, the development of a novel multifunctional micromotor with magnetic-therm…
View article: Spin-orbit coupling in spatiotemporal optical vortex arrays generated by 4Pi coherent focusing
Spin-orbit coupling in spatiotemporal optical vortex arrays generated by 4Pi coherent focusing Open
View article: Large Group Delay in Silicon-on-Insulator Chirped Spiral Bragg Grating Waveguide
Large Group Delay in Silicon-on-Insulator Chirped Spiral Bragg Grating Waveguide Open
Limited by large transmission loss, the development of transverse electric (TE) mode silicon-on-insulator (SOI) based on-chip long length chirped grating waveguide faces many difficulties now. To overcome this problem, multi-mode waveguide…
View article: Broadband and compact polarization beam splitter in LNOI hetero-anisotropic metamaterials
Broadband and compact polarization beam splitter in LNOI hetero-anisotropic metamaterials Open
In this paper, theoretical modeling and numerical simulations of a high-performance polarization beam splitter (PBS) based on hetero-anisotropic metamaterials are proposed on the lithium-niobate-on-insulator (LNOI) platform. The hetero-ani…
View article: A straightforward and sensitive “ON–OFF” fluorescence immunoassay based on silicon-assisted surface enhanced fluorescence
A straightforward and sensitive “ON–OFF” fluorescence immunoassay based on silicon-assisted surface enhanced fluorescence Open
A straightforward immunoassay based on silicon-assisted surface enhanced fluorescence (SEF) has been demonstrated using a silicon-based fluorescent immune substrate and silver-antibody nanoconjugate (SANC).
View article: Synthesis of Mn-doped CsPbCl<sub>x</sub>Br<sub>3−x</sub> perovskite nanocrystals using ultrasonic irradiation-promoted with decrease of reaction order
Synthesis of Mn-doped CsPbCl<sub>x</sub>Br<sub>3−x</sub> perovskite nanocrystals using ultrasonic irradiation-promoted with decrease of reaction order Open
The incorporation of impurity cation as a way of introducing various novel functionalities provides an additional level of control over the electronic and optical properties of perovskite nanocrystals (NCs). However, the conventional post-…
View article: A Seven Bit Silicon Optical True Time Delay Line for Ka-Band Phased Array Antenna
A Seven Bit Silicon Optical True Time Delay Line for Ka-Band Phased Array Antenna Open
A seven-bit optical true time delay unit with a delay tuning increment of 1.42 ps was designed and fabricated on silicon photonics platform, which can be utilized in Ka-band phased array antenna systems. The delay unit consists of eight th…
View article: Performance improvements of a tunable bandpass microwave photonic filter based on a notch ring resonator using phase modulation with dual optical carriers
Performance improvements of a tunable bandpass microwave photonic filter based on a notch ring resonator using phase modulation with dual optical carriers Open
A tunable bandpass microwave photonic filter can be achieved by using a notch ring resonator with optical phase modulation. However, the filter's out of band rejection ratio and shape factor are limited due to the ring resonator's residual…
View article: Realization of mid-infrared broadband absorption in monolayer graphene based on strong coupling between graphene nanoribbons and metal tapered grooves
Realization of mid-infrared broadband absorption in monolayer graphene based on strong coupling between graphene nanoribbons and metal tapered grooves Open
In this paper, we theoretically propose an effective broadband absorption architecture in mid-infrared region based on strong coupling between the plasmonic resonance of graphene nanoribbons and the waveguide mode of a metal tapered groove…
View article: Investigating the Intracellular Behaviors of Liposomal Nanohybrids <i>via</i> SERS: Insights into the Influence of Metal Nanoparticles
Investigating the Intracellular Behaviors of Liposomal Nanohybrids <i>via</i> SERS: Insights into the Influence of Metal Nanoparticles Open
The recent proposition to combine liposomes with nanoparticles presents great opportunities to develop multifunctional drug delivery platforms. Although impressive progress has been made, attempts to elucidate the role nanoparticles play i…
View article: Design and Analysis of a Compact SOI-Based Aluminum/Highly Doped p-Type Silicon Hybrid Plasmonic Modulator
Design and Analysis of a Compact SOI-Based Aluminum/Highly Doped p-Type Silicon Hybrid Plasmonic Modulator Open
A silicon-based n-p-n-type hybrid plasmonic modulator operating at telecom wavelength of 1550 nm is theoretically investigated in this paper. The proposed modulator is dependent on the integration of a 1- -long n-p-n-type Al/p-Si hybrid pl…
View article: Compact, integrated PLZT optical switch array
Compact, integrated PLZT optical switch array Open
Due to the excellent electro-optic properties of lead lanthanum zirconium titanate ((Pb,La)(Zr,Ti)O3, PLZT), compact 1×2 and 1×4 PLZT optical switches with a high response speed are proposed and fabricated successfully in this Letter. By i…