Metasurface-Enabled On-Chip Manipulation of Higher-Order Poincaré Sphere Beams DOI
Jitao Ji, Zhizhang Wang,

Jiacheng Sun

et al.

Nano Letters, Journal Year: 2023, Volume and Issue: 23(7), P. 2750 - 2757

Published: March 23, 2023

An integrated way to generate and manipulate higher-order Poincaré sphere beams (HOPBs) is a sought-after goal in photonic circuits for high-capacity communication systems. Here, we demonstrate novel method on-chip generation manipulation of HOPBs through combining metasurface with optical waveguides on lithium niobate insulator platform. With phase modulation by diatomic geometric metasurface, guided waves are extracted into free space high signal-to-noise ratio the form two orthogonal circularly polarized vortices which linearly superposed HOPBs. Meanwhile, dual-port waveguide crossing established reconfigure output states an arbitrary point based in-plane interference waves. Our approach provides promising solution compact manner, would be further enhanced employing electro-optical access fully tunable scheme.

Language: Английский

Midinfrared Spectroscopic Analysis of Aqueous Mixtures Using Artificial-Intelligence-Enhanced Metamaterial Waveguide Sensing Platform DOI

Jingkai Zhou,

Zixuan Zhang, Bowei Dong

et al.

ACS Nano, Journal Year: 2022, Volume and Issue: 17(1), P. 711 - 724

Published: Dec. 28, 2022

As miniaturized solutions, mid-infrared (MIR) waveguide sensors are promising for label-free compositional detection of mixtures leveraging plentiful absorption fingerprints. However, the quantitative analysis liquid is still challenging using MIR sensors, as spectrum overlaps multiple organic components accompanied by strong water background. Here, we present an artificial-intelligence-enhanced metamaterial sensing platform (AIMWSP) aqueous mixture in MIR. With sensitivity-improved and assistance machine learning, spectra a ternary can be successfully distinguished decomposed to single-component predicting concentration. A classification accuracy 98.88% 64 mixing ratios 92.86% four concentrations below limit (972 ppm, based on 3σ) with steps 300 ppm realized. Besides, concentration prediction root-mean-squared error varying from 0.107 vol % 1.436 also achieved. Our work indicates potential further extending this spectrometer-on-chip aiming data analytics environments.

Language: Английский

Citations

41
Efficient Meta-couplers Squeezing Propagating Light into On-Chip Subwavelength Devices in a Controllable Way DOI
Yizhen Chen, Xiaoying Zheng, Xiyue Zhang

et al.

Nano Letters, Journal Year: 2023, Volume and Issue: 23(8), P. 3326 - 3333

Published: April 7, 2023

On-chip photonic systems play crucial roles in nanoscience and nanoapplications, but coupling external light to these subwavelength devices is challenging due a large mode mismatch. Here, we establish new scheme for realizing highly miniaturized couplers efficiently exciting on-chip controllable way. Relying on both resonant Pancharatnam–Berry mechanisms, our meta-device can couple circularly polarized surface plasmon, which then focused into spot placed with target device. We experimentally demonstrate two meta-couplers. The first excite an waveguide (with 0.1λ × 0.2λ cross section) absolute efficiency of 51%, while the second achieve incident spin-selective excitation dual-waveguide system. Background-free gap–plasmon nanocavity local field enhanced by >1000 times numerically demonstrated. Such connects propagating free space localized fields devices, being favored many integration-optics applications.

Language: Английский

Citations

37
Diffractive optical elements 75 years on: from micro-optics to metasurfaces DOI Creative Commons
Qiang Zhang, Zehao He, Zhenwei Xie

et al.

Photonics Insights, Journal Year: 2023, Volume and Issue: 2(4), P. R09 - R09

Published: Jan. 1, 2023

Diffractive optical elements (DOEs) are intricately designed devices with the purpose of manipulating light fields by precisely modifying their wavefronts. The concept DOEs has its origins dating back to 1948 when D. Gabor first introduced holography. Subsequently, researchers binary (BOEs), including computer-generated holograms (CGHs), as a distinct category within realm DOEs. This was revolution in devices. next major breakthrough field manipulation occurred during early 21st century, marked advent metamaterials and metasurfaces. Metasurfaces particularly appealing due ultra-thin, ultra-compact properties capacity exert precise control over virtually every aspect fields, amplitude, phase, polarization, wavelength/frequency, angular momentum, etc. advancement micro/nano-structures also enabled various applications such information acquisition, transmission, storage, processing, display. In this review, we cover fundamental science, cutting-edge technologies, wide-ranging associated micro/nano-scale for regulating fields. We delve into prevailing challenges pursuit developing viable technology real-world applications. Furthermore, offer insights potential future research trends directions manipulation.

Language: Английский

Citations

33
Recent advances in metamaterial integrated photonics DOI
Pavel Cheben, Jens H. Schmid, Robert Halir

et al.

Advances in Optics and Photonics, Journal Year: 2023, Volume and Issue: 15(4), P. 1033 - 1033

Published: Nov. 8, 2023

Since the invention of silicon subwavelength grating waveguide in 2006, metamaterial engineering has become an essential design tool photonics. Employing well-established nanometer-scale semiconductor manufacturing techniques to create metamaterials optical waveguides allowed unprecedented control flow light photonic chips. This is achieved through fine-tuning fundamental properties such as modal confinement, effective index, dispersion, and anisotropy, directly by lithographic imprinting a specific structure onto nanophotonic waveguide. In parallel, low-loss mode propagation readily obtained over broad spectral range since periodicity effectively avoids losses due spurious resonances bandgap effects. this review we present recent advances surging field integrated After briefly introducing concepts governing periodic via Floquet–Bloch modes, progress main application areas nanostructures photonics, presenting most representative devices. We specifically focus on off-chip coupling interfaces, polarization management anisotropy engineering, filtering wavelength multiplexing, evanescent biochemical sensing, mid-infrared nonlinear optics optomechanics. also introduce nascent research area resonant photonics leveraging Mie dielectrics for on-chip guiding waves, with first Huygens’ metawaveguide recently demonstrated. Finally, provide brief overview inverse approaches machine-learning algorithms metamaterials. our conclusions, summarize key developments while highlighting challenges future prospects.

Language: Английский

Citations

31
Metasurface-Enabled On-Chip Manipulation of Higher-Order Poincaré Sphere Beams DOI
Jitao Ji, Zhizhang Wang,

Jiacheng Sun

et al.

Nano Letters, Journal Year: 2023, Volume and Issue: 23(7), P. 2750 - 2757

Published: March 23, 2023

An integrated way to generate and manipulate higher-order Poincaré sphere beams (HOPBs) is a sought-after goal in photonic circuits for high-capacity communication systems. Here, we demonstrate novel method on-chip generation manipulation of HOPBs through combining metasurface with optical waveguides on lithium niobate insulator platform. With phase modulation by diatomic geometric metasurface, guided waves are extracted into free space high signal-to-noise ratio the form two orthogonal circularly polarized vortices which linearly superposed HOPBs. Meanwhile, dual-port waveguide crossing established reconfigure output states an arbitrary point based in-plane interference waves. Our approach provides promising solution compact manner, would be further enhanced employing electro-optical access fully tunable scheme.

Language: Английский

Citations

30