Dual-Wavelength Polarization-Dependent Bifocal Metalens for Achromatic Optical Imaging Based on Holographic Principle

Qu, Jiaqi; Luo, Huaijian; Chen, Yu

doi:10.3390/s22051889

Cited by 3 publications

(2 citation statements)

References 38 publications

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“…Compared with conventional optical devices, on-chip planar metasurface has been introduced to provide unique ways for advanced wavefront manipulation in a wide range of applications as diverse as metalenses [10,11], holographic devices [12] and optical computing systems. With the extraordinary capability to control light properties like phase and polarization state, metasurface has been proposed as the competitive OAM and SAM detection strategy.…”

Section: Introductionmentioning

confidence: 99%

Twelve-channel detection of spin and orbital angular momenta via dielectric metasurface

Cheng

Wang

et al. 2022

Optoelectronic Devices and Integration XI

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Spin angular momentum (SAM) and orbital angular momentum (OAM), which can provide different orthogonal states as independent information channels, have opened up new avenues in optical communications, imaging processing, and quantum optics. However, detection and analysis of these states concurrently require complicated optical setups, which greatly hinder system integration. Here, a 12-channel detection for SAM and OAM modes based on a single dielectric ultracompact metasurface is introduced and investigated. The phase profile of the metasurface is theoretically constructed by merging both the propagation phase and Pancharatnam-Berry (PB) phase modulations. The former modulation is governed by the geometric parameters of the nanostructures and the latter results from the rotation angle of the nanostructures. A set of Silicon nanobricks are selected as unit cells covering 0 to 2π phase range with transmission over 90% and polarization conversion efficiency over 85%. Adopting spin photonic Hall effect and off-axis focusing scheme, light beams carrying different vortices are demultiplexed into several vortex beams with distinct topological charges, and each can be recognized with different focused solid spots on a transverse plane with unique azimuthal coordinate. SAM modes associated with left/right circular polarization of light and OAM modes with topological charges ranging from 0 to 5 can be simultaneously detected. The proposed optical device provides an efficient method to demultiplex the incident with a superposition of different SAM and OAM modes through a single-layer metasurface, which significantly improves the compactness of the system. We envision this work will pave the way for the development of high-capacity optical communication applications and integrated optical systems.

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Section: Introductionmentioning

confidence: 99%

Twelve-channel detection of spin and orbital angular momenta via dielectric metasurface

Cheng

Wang

et al. 2022

Optoelectronic Devices and Integration XI

Self Cite

View full text Add to dashboard Cite

show abstract

“…Zhang et al [ 5 ] propose a polarization phasor imaging method for image recovery in foggy scenes with the assistance of ToF cameras. With the introduction of metalens, Qu et al [ 6 ] propose a dual-wavelength achromatic metalens that generates one or two foci according to the polarization of the incident. The proposed method is demonstrated to open the path for a combination of multi-wavelength imaging and chiral imaging, which may find potential applications, such as achromatic optical devices and polarization-controlled biomedical molecular imaging systems.…”

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confidence: 99%