All-Optical Single-Channel Plasmonic Logic Gates

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 15, 2025

Optical computing, renowned for its light-speed processing and low power consumption, typically relies on the coherent control of two light sources. However, there are challenges in stabilizing maintaining high optical spatiotemporal coherence, especially large-scale computing systems. The coherence requires rigorous feedback circuits numerous phase shifters, introducing system instability complexity. Here we propose an innovative logic gate using a single source, with frequency polarization serving as virtual inputs. Our design leverages frequency-polarization multiplexed metasurfaces to achieve all basic operations by selectively routing surface plasmon polaritons. This single-channel maintains inherent between polarization, thereby considerably eliminating stringent light-source specifications rigid controls resulting higher stability. device showcases unique application potentials on-chip readout encryption information random sequences one-time pad, unlocking fresh prospects protection other simple

Language: Английский

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Chirality-induced tunable quasi-Brewster angle and anomalous photonic spin-Hall effect

Optics & Laser Technology, Journal Year: 2025, Volume and Issue: 187, P. 112811 - 112811

Published: March 17, 2025

Language: Английский

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Effectively suppressed reflected photonic spin Hall effect

Nanophotonics, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Abstract The photonic spin Hall effect can engender transverse spatial and angular displacements in both transmission reflection, with significant applications optical imaging, edge detection, the development of spin-based nanophotonic devices. While previous research has focused on enhancing effect, suppression be beneficial for spin-switching, offering advantages such as increased speed sensitivity In this study, we establish a quantitative correlation between reflection coefficient reflected light, induced by grounded electromagnetic theory. We find that displacement light eliminated under condition r pp = − ss , where denotes coefficient, first (second) superscript polarization (incident) light. This applies to arbitrary states, at incident angles, is independent wavelength beam waist. A similar outcome obtained Such distinctive are attainable through use an interface satisfies . Additionally, provide succinct overview methodologies constructing reflective switches.

Language: Английский

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Optical Binary Operator Based on Thermally Controllable Chiral Superstructures

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: May 5, 2025

By harnessing multiple dimensions of light to implement mathematical functions, structured optical materials introduce a twist in the paradigm informatics, shifting from "displaying with light" "computing light". One vital subset operators is binary operators, whose output depends on two inputs, such as Boolean logic. Herein, we propose and demonstrate an operator based thermally controllable chiral nanostructures. engineering anisotropic materials, determined by interplay between inputs; furthermore, accompanying Pancharatnam-Berry phase unlocks additional computing functionalities. The customized modulation orbital angular momentum intensity distribution enables operations integers images. tunable operating spectrum spans ultrawide range over 1600 nm visible near-infrared region. This study reveals new opportunities for soft matter may facilitate diverse applications machine vision artificial intelligence.

Language: Английский

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Integrated Terahertz topological valley-locked power Divider with arbitrary power ratios

Optics Letters, Journal Year: 2024, Volume and Issue: 49(19), P. 5579 - 5579

Published: Sept. 9, 2024

Integrated power dividers (PDs) are essential in terahertz (THz) communication and radar systems, but miniaturization often leads to performance degradation due fabrication inaccuracies sharp bends. Topological photonics offers a solution these issues, yet creating THz with arbitrary splitting ratios remains challenging. We present design methodology for on-chip topological customizable using valley-locked photonic crystals. These crystals feature tri-layered structure two distinct valley Chern number layers an intermediate semimetal layer. Utilizing the Jackiw–Rebbi model, we show that characteristic impedance of crystals, thus division ratio, can be tuned by adjusting layer width. Our approach is validated through simulations experiments both equal (1:1) unequal (4:9) ratios. This method enables efficient navigation around bends robust connectivity.

Language: Английский

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Dual-channel intrinsic and nonlinear chirality for all-optical logic operation

Optics Letters, Journal Year: 2024, Volume and Issue: 49(20), P. 5731 - 5731

Published: Sept. 16, 2024

Chiral metasurfaces hold excellent performance in enhancing spin-dependent light–matter interaction, showing broad application prospects areas such as chiral imaging, light sources, and sensing. However, utilizing resonant to achieve all-optical logic gates has not been reported yet. In this work, dual-channel intrinsic nonlinear chiroptical responses are achieved on lithium niobate metasurfaces. The combination of bound states the continuum (BICs) modes with revealed its linear chirality. metasurface achieves circular dichroism above 0.9 close dual-band. Based second-order response, multiple (including NOT, OR, NAND, AND, NOR) can be realized Our results confirm operability realizing gates, offering a potentially promising approach for development new, best our knowledge, devices.

Language: Английский

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Re-examining the anomalous spin-orbit interactions of light around Fresnel coefficient singularities

Optics Letters, Journal Year: 2024, Volume and Issue: 50(1), P. 49 - 49

Published: Dec. 4, 2024

Using a full-wave theory to analyze the light beam scattering at sharp interfaces, we reexamine anomalous spin–orbit interaction (SOI) around Fresnel coefficient (FC) singularities. We evaluate spin-dependent shifts near singularity for three typical optical comparing our results with existing ones. Existing theories neglect contribution of wave vector component k y i FC singularities, potentially leading erroneous results. In contrast, approach comprehensively considers x and contributions in without any approximation. Our analysis reveals significant deformations scattered intensity patterns causing both out-of-plane in-plane spin-Hall shifts, uncaptured by prior theories. These findings offer comprehensive understanding on interactions generic interfaces.

Language: Английский

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