Achromatic metalens array for full-colour light-field imaging

Lin, Ren Jie; Su, Vin Cent; Wang, Shuming; Chen, Mu Ku; Chung, Tsung Lin; Chen, Yu Han; Kuo, Hsin Yu; Chen, Jia-Wern; Ji, Chen; Huang, Yi-Teng; Wang, Jung Hsi; Chu, Cheng Hung; Wu, Pin Chieh; Li, Tao; Wang, Zhenlin; Zhu, Shining; Tsai, Din Ping

doi:10.1038/s41565-018-0347-0

Cited by 513 publications

(279 citation statements)

References 25 publications

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“…Benefiting from the exotic properties of metasurfaces, various types of metalenses with unusual functionalities have been developed. Examples include dual‐polarity plasmonic metalens, broadband/multispectral achromatic metalens, metalens array, light‐sword lens, multi‐foci lens, multifunctional metalens, and polarization‐dependent metalens . An optical element with polarization manipulation functionality, that is, polarization rotator, has been used in many research areas ranging from optical isolators to sophisticated organic structure analysis .…”

Section: Introductionmentioning

confidence: 99%

A Multi‐Foci Metalens with Polarization‐Rotated Focal Points

Zang

Ding

Intaravanne

et al. 2019

Laser & Photonics Reviews

159

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Benefiting from the unprecedented capability of metasurfaces in the manipulation of light propagation, metalenses can provide novel functions that are very challenging or impossible to achieve with conventional lenses. Here, an approach to realizing multi‐foci metalenses is proposed and experimentally demonstrated with polarization‐rotated focal points based on geometric metasurfaces. Multi‐foci metalenses with various polarization rotation directions are developed using silicon pillars with spatially variant orientations. The focusing characteristic and longitudinal polarization‐dependent imaging capability are demonstrated upon the illumination of a linearly polarized light beam. The uniqueness of this multi‐foci metalens with polarization‐rotated focal points may open a new avenue for imaging, sensing, and information processing.

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Section: Introductionmentioning

confidence: 99%

A Multi‐Foci Metalens with Polarization‐Rotated Focal Points

Zang

Ding

Intaravanne

et al. 2019

Laser & Photonics Reviews

159

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“…Silicon nanowire field-effect transistors (SiNW-FETs)-based biosensors are reliable, sensitive, label-free, and real-time tools that have been widely applied to analyze the release of biological molecules from cells. [31][32][33][34][35][36][37][38] In this report, we modified a multiple parallel-connected SiNW-FET with the Zn 2+ -sensitive fluorophore of FluoZin-3 (referred to as FZ-3/SiNW-FET) to quantify the Zn 2+ released from excited neurons in real time. By placing a coverslip seeded with cultured embryonic cortical neurons atop an FZ-3/SiNW-FET, the C Zn ex 2+ surrounding the excited neurons elevated to ≈110 × 10 −9 m upon the stimulation with AMPA.…”

mentioning

confidence: 99%

The Extracellular Zn²⁺ Concentration Surrounding Excited Neurons Is High Enough to Bind Amyloid‐β Revealed by a Nanowire Transistor

Anand

Chi

Banerjee

et al. 2018

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The Zn2+ stored in the secretory vesicles of glutamatergic neurons is coreleased with glutamate upon stimulation, resulting in the elevation of extracellular Zn2+ concentration (CZn2+ex). This elevation of CZn2+ex regulates the neurotransmission and facilitates the fibrilization of amyloid‐β (Aβ). However, the exact CZn2+ex surrounding neurons under (patho)physiological conditions is not clear and the connection between CZn2+ex and the Aβ fibrilization remains obscure. Here, a silicon nanowire field‐effect transistor (SiNW‐FET) with the Zn2+‐sensitive fluorophore, FluoZin‐3 (FZ‐3), to quantify the CZn2+ex in real time is modified. This FZ‐3/SiNW‐FET device has a dissociation constant of ≈12 × 10−9m against Zn2+. By placing a coverslip seeded with cultured embryonic cortical neurons atop an FZ‐3/SiNW‐FET, the CZn2+ex elevated to ≈110 × 10−9m upon stimulation with α‐amino‐3‐hydroxy‐5‐methyl‐4‐isoxazolepropionic acid (AMPA). Blockers against the AMPA receptor or exocytosis greatly suppress this elevation, indicating that the Zn2+ stored in the synaptic vesicles is the major source responsible for this elevation of CZn2+ex. In addition, a SiNW‐FET modified with Aβ could bind Zn2+ with a dissociation constant of ≈633 × 10−9m and respond to the Zn2+ released from AMPA‐stimulated neurons. Therefore, the CZn2+ex can reach a level high enough to bind Aβ and the Zn2+ homeostasis can be a therapeutic strategy to prevent neurodegeneration.

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“…Theoretical and experimental results demonstrates that the position of focal point has a very weak frequency dependence over a broadband. Different from the application of achromatic metalens for full-color camera in optics [2][3][4][5], here a highly directional and long-distance acoustic probing scheme is proposed by a combination of achromatic reflected metalens and triple sensors separated by a subwavelength interval, in which a signal processing method is presented to eliminate the interferences between incident waves and reflected waves, resulting in a highly directional beampattern confirmed by an experiment. Although no interference exists between incident waves and transmitted waves for an achromatic transmitted lens, an achromatic reflected lens has advantages in focusing efficiency and bandwidth, which is a good choice for a longdistance acoustic probing.…”

Section: Resultsmentioning

confidence: 99%

“…Owing to the development of metamaterials and metasurfaces, optical focusing and imaging by lenses have attracted much attention from scientists, such as a perfect lens for subwavelength imaging [1] and achromatic metalenses for full-color detection and imaging [2][3][4][5]. Advances in optical focusing and imaging have inspired researchers in acoustics to design novel acoustic focusing and imaging devices.…”

Section: Introductionmentioning

confidence: 99%

Achromatic reflected metalens for highly directional and long-distance acoustic probing

Wang

et al. 2020

New J. Phys.

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Simultaneous temporal and spatial focusing of a pulse is of significance for detection and imaging.Here, an achromatic reflected metalens is designed using hybrid resonance and anti-resonance. The theoretical result demonstrates that the anti-resonance provides an extra degree of freedom to control local phases of reflected waves, yielding an achromatic lens of thickness equal to one half of central wavelength. To overcome the shortcoming of traditional approach to design lenses (neglecting the intercell coupling), a boundary integral method is proposed to alleviate the focus deviation over a broadband. The achromatic feature of designed lens is then verified in the frequency range from 2800 to 5600 Hz by an experiment. Owing to a very weak frequency dependence of focal point and a high reflected focusing efficiency over a broadband, a highly directional and long-distance acoustic probing scheme (the mainlobe width about 8 0 ) is proposed with the aid of achromatic reflected metalens and being confirmed by another experiment, where a signal processing method using triple sensors separated by a subwavelength interval is adopted to eliminate the interferences between incident waves and reflected waves. Our result may find its application in a long-distance underwater acoustic probing.

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Achromatic metalens array for full-colour light-field imaging

Cited by 513 publications

References 25 publications

A Multi‐Foci Metalens with Polarization‐Rotated Focal Points

A Multi‐Foci Metalens with Polarization‐Rotated Focal Points

The Extracellular Zn²⁺ Concentration Surrounding Excited Neurons Is High Enough to Bind Amyloid‐β Revealed by a Nanowire Transistor

Achromatic reflected metalens for highly directional and long-distance acoustic probing

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Achromatic metalens array for full-colour light-field imaging

Cited by 513 publications

References 25 publications

A Multi‐Foci Metalens with Polarization‐Rotated Focal Points

A Multi‐Foci Metalens with Polarization‐Rotated Focal Points

The Extracellular Zn2+ Concentration Surrounding Excited Neurons Is High Enough to Bind Amyloid‐β Revealed by a Nanowire Transistor

Achromatic reflected metalens for highly directional and long-distance acoustic probing

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The Extracellular Zn²⁺ Concentration Surrounding Excited Neurons Is High Enough to Bind Amyloid‐β Revealed by a Nanowire Transistor