Efficiency-enhanced and sidelobe-suppressed super-oscillatory lenses for sub-diffraction-limit fluorescence imaging with ultralong working distance

Li, Wenli; He, Pei; Yuan, Weizheng; Yu, Yiting

doi:10.1039/c9nr10697a

Cited by 15 publications

(9 citation statements)

References 46 publications

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“…[16,17] Novel plasmonic materials such as doped semiconductors and conducting oxides and all dielectric materials have been proposed to address these issues, but the fabrication of complex and complicated nanopatterns requires a high-cost and time-consuming process by using electron beam lithography (EBL) as well as focused ion beam (FIB) process. [18][19][20] To this regard, significant efforts have been spent to more cost-effective fabrication processes such as direct laser writing [21] , deep-ultraviolet (DUV) projection lithography [22] and optical lithography [23,24] .. Therefore, in order to realize efficient and tunable sub-wavelength focusing at a This article is protected by copyright.…”

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confidence: 99%

“…Given that recently reported low-cost optical lithography fabrications involve solvent lift-off process and ion etching, which could lead to inevitable degradation of the 2D perovskite. [22][23][24] In this regard, the 2D perovskite materials fabricated by dry direct laser writing method may open up new possibilities to enable high-performance tunable optics with a low cost.…”

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confidence: 99%

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Flat Lenses Based on 2D Perovskite Nanosheets

Wang

Zhang

et al. 2020

Advanced Materials

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Ultrathin flat lenses based on metasurfaces or metamaterials have shown great promise as essential components in nano optical system with capability of abrupt changes of light wavefronts in recent years. However, such structural designs require complex nanopatterns and time-consuming nanofabrication process. In this regard, we developed flat lenses based on 2D perovskite nanosheets using a cost-effective mask-free femtosecond direct laser writing system. The optical properties of 2D perovskite are rationally adjusted through facile composition engineering as well as thicknessdependent quantum-size confinement. Diffraction theory model is derived to understand the focusing mechanism of the 2D perovskite nanosheets flat lenses. The as-fabricated lenses exploit the tunable material property variations to effectively manipulate not only amplitude but also phase of the incident light to focus into a 3D focal spot with a sub-wavelength resolution in the range of 0.5-0.9 λ. The results pave the way towards low-cost and large-scale high-resolution imaging application in the future.

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confidence: 99%

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confidence: 99%

Flat Lenses Based on 2D Perovskite Nanosheets

Wang

Zhang

et al. 2020

Advanced Materials

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“…However, efficiency enhanced and resolution improved for super-resolution imaging is a shared concern in super-resolution imaging. [28,48] With the use of diffractive optics assisted HiFi-FM, the probing spot with constrained spots is not circularly symmetric. Owing to the square target field in the iterative process, we do not use the optimization routine in polar coordinates while without the limitation of binary structure on the optimal solution.…”

Section: Discussionmentioning

confidence: 99%

“…In a pointby-point manner, lots of researchers focused on how to decrease the width of the mainlobe to improve the resolution. [8,17,19,[25][26][27][28] However, the intensities and distributions of sidelobes of the focused spot have an effect on the final reconstructed superresolution images. Especially, biological structures discovered using super-resolution techniques need to be interpreted with highfidelity (HiFi) to avoid misinterpretation.…”

Section: Introductionmentioning

confidence: 99%

High‐Fidelity Far‐Field Microscopy at λ/8 Resolution

Liu

Tan

2022

Laser & Photonics Reviews

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The emergence of far‐field super‐resolution microscopy has rejuvenated the possibility for nanoscale imaging. Approaches to far‐field super‐resolution that utilize point scanning often depend on spatially reducing the size of the focused spot. However, the focused spot always achieves high resolution at the expense of extremely low light efficiency for the probing mainlobe and high‐intensity sidelobes, which limits the applications in nanoscale imaging and might cause misinterpretation of samples. Here, a sharp probing spot is reported with the diffraction efficiency of 3.76% at the resolution of 38% of the Airy spot size assisted by the 2D multilevel diffractive optical element (DOE) experimentally. The diffraction efficiency of DOE is improved by at least two orders of magnitude at the same resolution by breaking the limitation of circular 0–π binary structure superoscillatory lens. To eliminate the influence of the high‐intensity sidelobes, high‐fidelity images are reconstructed based on the modified deconvolution algorithm by virtue of the prior knowledge. Finally, high‐fidelity far‐field microscopy (HiFi‐FM) is constructed and experimental results show that HiFi‐FM allows the resolution of spatially complex samples better than 69 nm while acquiring high fidelity.

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“…To make optical components lightweight and multifunctional has always been one of the goals pursued in optics. Fresnel zone plate (FZP) is a typical representative [1][2][3][4][5][6][7][8]. In particular, developed on the basis of FZP, the multi-level diffraction lens (MDL) has achieved an achromatic imaging function range from visible to long-wave infrared bands via a globally optimized numerical iterative algorithm [9,10].…”

Section: Introductionmentioning

confidence: 99%

Efficient Achromatic Broadband Focusing and Polarization Manipulation of a Novel Designed Multifunctional Metasurface Zone Plate

Liu

Sun

et al. 2021

Nanomaterials

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In this paper, comprehensively utilizing the diffraction theory and electromagnetic resonance effect is creatively employed to design a multifunctional metasurface zone plate (MMZP) and achieve the control of polarization states, while maintaining a broadband achromatic converging property in a near-IR region. The MMZP consists of several rings with fixed width and varying heights; each ring has a number of nanofins (usually called meta-atoms). The numerical simulation method is used to analyze the intensity distribution and polarization state of the emergent light, and the results show that the designed MMZP can realize the polarization manipulation while keeping the broadband in focus. For a specific design wavelength (0.7 μm), the incident light can be converted from left circularly polarized light to right circularly polarized light after passing through the MMZP, and the focusing efficiency reaches above 35%, which is more than twice as much as reported in the literature. Moreover, the achromatic broadband focusing property of the MMZP is independent with the polarization state of the incident light. This approach broadens degrees of freedom in micro-nano optical design, and is expected to find applications in multifunctional focusing devices and polarization imaging.

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Efficiency-enhanced and sidelobe-suppressed super-oscillatory lenses for sub-diffraction-limit fluorescence imaging with ultralong working distance

Abstract: Customized efficiency-enhanced and sidelobe-suppressed super-oscillatory lenses for sub-diffraction-limit fluorescence imaging with ultralong working distances without photobleaching and a pinhole filter.

Cited by 15 publications

References 46 publications

Flat Lenses Based on 2D Perovskite Nanosheets

Flat Lenses Based on 2D Perovskite Nanosheets

High‐Fidelity Far‐Field Microscopy at λ/8 Resolution

Efficient Achromatic Broadband Focusing and Polarization Manipulation of a Novel Designed Multifunctional Metasurface Zone Plate

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