Fabry-Pérot Cavity Formed with Dielectric Metasurfaces in a Hollow-Core Fiber

Flannery, Jeremy; Maruf, Rubayet Al; Yoon, Taehyun; Bajcsy, Michal

doi:10.1021/acsphotonics.7b01154

Cited by 33 publications

(39 citation statements)

References 33 publications

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“…This allows for implementation in devices where size constraints are stringent, as in machine vision sensors, implantable microscopy, and planar cameras [59]. This has been demonstrated with SiN metasurface systems in optical cavities [25], computational imaging systems [26], and disorder-engineered wavefront shaping [60], providing substantial size reductions while maintaining or enhancing the desired performance. In addition to the size benefits of metasurfaces in general, SiN is particularly well suited for a broad range of applications because of its wide band gap, enabling high efficiency from the near-UV into the infrared.…”

Section: Basic Elementioning

confidence: 99%

“…Placing two such mirrors in front of each other, the structures can from a Fabry-Perot cavity. Recently, such a device was realized by transferring two SiN metasurfaces on either end of a hollow core fiber [25] (Fig. 5).…”

Section: Optical Cavitiesmentioning

confidence: 99%

“…While much of the initial research investigated silicon and metal-based metasurfaces [1,4,[7][8][9][10][11][12] for use in transformation optics and integrated optics, lower index materials became appealing because of their transparency at visible wavelengths where there are numerous applications in imaging, display, and spectroscopy. This initiated an exploration into low-loss dielectric platforms that could support high efficiency operation at visible wavelengths, producing a wide array of flat and visible wavelength metasurface elements and optical systems [13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In this review, we begin in Section 2 by conducting a survey of existing low-loss materials employed in metasurface design, expanding on advantages and disadvantages of the material platforms.…”

Section: Introductionmentioning

confidence: 99%

“…Hollow core fiber metasurface mirror cavity[25]. Schematic representation (left) and a scanning electron micrograph (right) of the metasurface-based cavity design.…”

mentioning

confidence: 99%

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Broadband transparent and CMOS-compatible flat optics with silicon nitride metasurfaces [Invited]

Colburn¹,

Zhan²,

Bayati³

et al. 2018

Opt. Mater. Express

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Metasurface optics is a promising candidate for realizing the next generation of miniaturized optical components. Unlike refractive optics, these devices modify light over a wavelength-scale thickness, changing the phase, amplitude, and polarization. This review details recent developments and state-of-the-art metasurfaces realized using silicon nitride. We emphasize this material as to date it has the lowest refractive index with which metasurfaces have been experimentally demonstrated. The wide band gap of silicon nitride enables reduced absorption over a broad wavelength range relative to its higher index counterparts, providing a CMOS-compatible platform for producing a variety of high efficiency metasurface elements and systems.

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Section: Basic Elementioning

confidence: 99%

Section: Optical Cavitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Hollow core fiber metasurface mirror cavity[25]. Schematic representation (left) and a scanning electron micrograph (right) of the metasurface-based cavity design.…”

mentioning

confidence: 99%

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Broadband transparent and CMOS-compatible flat optics with silicon nitride metasurfaces [Invited]

Colburn¹,

Zhan²,

Bayati³

et al. 2018

Opt. Mater. Express

View full text Add to dashboard Cite

show abstract

“…As noise and transfer efficiency are critical to the functionality of all metasurfaces, TRM can be one more step to push the applications of metasurface in a wide scope. Great opportunities can be discovered in optical lithography, integrated photonics, optical sensing, data processing, and nanoimaging …”

Section: Introductionmentioning

confidence: 99%

Total Reflection Metasurface with Pure Modulated Signal

Chen

Hong

2018

Advanced Optical Materials

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fabrication facilities or complicated optical design and its transfer efficiency is still challenging to apply to most metasurfaces. [4,19,20] Dielectric metasurfaces have shown many advantages. However, due to the fabrication technology, many geometrical metasurfaces designed for the multiplexing, [5] hologram, [19] beam shaping, [21] and active emission control [22] are based on the metallic design and transmission mode. These designs are fundamentally limited by the diffraction efficiency of the nanoantennas. (summary of the metasurface efficiency can be found in the Supporting Information). The low transfer efficiency leads to a large drawback of the metasurface design: the zero-order intensity is mixed into the output signal, which is due to the unmodulated light. Optical devices require clean and pure output signals. For this reason, optical filters and other components are required to eliminate the noise in almost every experiment. [2,4,5,16,[19][20][21][22] However, one of the ultimate goals for metasurface is to achieve light modulation with an all-in-one ultrathin device, which can replace the bulky and complicated conventional components. These extra noise-reduction measures sacrifice the unique advantages of metasurfaces, reduce the reliability, and greatly limit its functionality in the region close to the metasurface, which becomes a primary weakness compared to classic optical components. In the pursuit to replace the classic optical components with metasurfaces, it becomes a fundamental challenge that requires a novel solution. It is also a barrier for future applications, such as integrated photonics and super-resolution supercritical lens. [10,[23][24][25] In this work, we present design principles for the first self-filtering metasurface with pure modulated light. Via the unprecedented control of the wavefront, it is possible to modify the internal total reflection as a barrier to block the unmodulated light. Unmodulated light contributes most of the noise. In our scheme, these noises are totally reflected at the interface so only the pure modulated light can transmit and propagate. [26] Thus, it is convenient to denote this functional device as Total Reflection Metasurface (TRM). TRM has many advantages to approach the goal of all-in-one metasurfaces. Such self-filtering functional device is insensitive to light polarization. Normal metasurface system requires the polarizer, metasurface, and optical filter to function. TRM integrates these components into an ultrathin design that can be directly plug-to-use. Without the help of extra components, the quality of the component can exceed its classic optical counterparts. Furthermore, based on the concept of TRM, we design an optical cavity strategy to Metasurface has been proposed as one critical platform for orbital angular momentum (OAM) multiplexing. While metasurfaces have unique advantages to achieve light modulation with an ultrathin 2D layer, the relatively low transfer efficiency is a primary drawback. Such weakness leads to the mixing of...

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Air Stable Organic–Inorganic Perovskite Nanocrystals@Polymer Nanofibers and Waveguide Lasing

Wang

Liu

et al. 2020

Small

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Hybrid organic-inorganic perovskites have attracted wide attentions owing to their potent optoelectronic applications associated with their unique features of excitons such as long carrier lifetime and diffusion length. [1,2] Since the discovery of Organic-inorganic hybrid perovskites have been considered as promising gain materials for lasing. Despite previous reports of lasing from nanocrystals, thin films and single crystals, the stability of perovskite lasers has been a challenge for its practical applications. Herein, a scalable strategy to prepare ultrastable perovskite@polymer hybrid fibers by employing a facile emulsion electrospinning approach is demonstrated. During the electrospinning process, polymethyl methacrylate (PMMA) first solidifies into an outer shell layer. Meanwhile, emulsion drops containing poly(vinylidene fluoride) (PVDF) and perovskite precursor are pushed inward and evolve into perovskite nanocrystals covered by PVDF. The PMMA with smooth surface benefits the light transport and the water-resistant PVDF blocks the moisture. The methylammonium lead bromide perovskite-embedded fibers can emit intensive light after storage in humid ambient environment (relative humidity >60%) or even in water. Amplified spontaneous emissions from the fibers network and waveguide lasing from chopped single fiber is demonstrated.

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Fabry-Pérot Cavity Formed with Dielectric Metasurfaces in a Hollow-Core Fiber

Cited by 33 publications

References 33 publications

Broadband transparent and CMOS-compatible flat optics with silicon nitride metasurfaces [Invited]

Broadband transparent and CMOS-compatible flat optics with silicon nitride metasurfaces [Invited]

Total Reflection Metasurface with Pure Modulated Signal

Air Stable Organic–Inorganic Perovskite Nanocrystals@Polymer Nanofibers and Waveguide Lasing

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