All-dielectric subwavelength metasurface focusing lens

West, Paul R.; Stewart, James L.; Kildishev, Alexander V.; Shalaev, Vladimir M.; Shkunov, V. V.; Strohkendl, F. P.; Zakharenkov, Yuri A.; Dodds, Robert K.; Byren, Robert W.

doi:10.1364/oe.22.026212

Cited by 281 publications

(166 citation statements)

References 28 publications

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“…From the multiple designs proposed so far, dielectric transmitarrays [6][7][8][9][10][11][12][13][14][15] are some of the most versatile metasurfaces because they provide high transmission and subwavelength spatial control of both polarization and phase. Several diffractive optical elements, including high-NA lenses and simultaneous phase and polarization controllers have recently been demonstrated with high efficiencies [10,11].…”

Section: Introductionmentioning

confidence: 99%

Multiwavelength polarization-insensitive lenses based on dielectric metasurfaces with meta-molecules

Arbabi¹,

Arbabi²,

Kamali³

et al. 2016

Optica

414

308

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Metasurfaces are nanostructured devices composed of arrays of subwavelength scatterers (or meta-atoms) that manipulate the wavefront, polarization, or intensity of light. Like most other diffractive optical devices, metasurfaces are designed to operate optimally at one wavelength. Here, we present a method for designing multiwavelength metasurfaces using unit cells with multiple meta-atoms, or meta-molecules. A transmissive lens that has the same focal distance at 1550 and 915 nm is demonstrated. The lens has a NA of 0.46 and measured focusing efficiencies of 65% and 22% at 1550 and 915 nm, respectively. With proper scaling, these devices can be used in applications where operation at distinct known wavelengths is required, like various fluorescence microscopy techniques.

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Section: Introductionmentioning

confidence: 99%

Multiwavelength polarization-insensitive lenses based on dielectric metasurfaces with meta-molecules

Arbabi¹,

Arbabi²,

Kamali³

et al. 2016

Optica

414

308

View full text Add to dashboard Cite

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“…Among these, high contrast dielectric metasurfaces have proven to be very versatile due to their high efficiency and ability to control phase and polarization of light with subwavelength resolution on both planar and non-planar surfaces in different parts of the optical spectrum [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Similar to other diffractive optical elements, metasurfaces with deflection capabilities such as lenses and beam deflectors suffer from chromatic aberrations [23][24][25][26], as schematically shown in Fig.…”

mentioning

confidence: 99%

High efficiency double-wavelength dielectric metasurface lenses with dichroic birefringent meta-atoms

Arbabi

Kamali

et al. 2016

Opt. Express

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Metasurfaces are ultrathin optical structures that manipulate optical wavefronts. Most metasurface devices which deflect light are designed for operation at a single wavelength, and their function changes as the wavelength is varied. Here we propose and demonstrate a double-wavelength metasurface based on polarization dependent dielectric meta-atoms that control the phases of two orthogonal polarizations independently. Using this platform, we design lenses that focus light at 915 and 780 nm with perpendicular linear polarizations to the same focal distance. Lenses with numerical apertures up to 0.7 and efficiencies from 65% to above 90% are demonstrated. In addition to the high efficiency and numerical aperture, an important feature of this technique is that the two operation wavelengths can be chosen to be arbitrarily close. These characteristics make these lenses especially attractive for fluorescence microscopy applications. 3. S. Jahani and Z. Jacob, "All-dielectric metamaterials," Nature Nanotech. 11, 23-36 (2016). 4. P. Lalanne, S. Astilean, P. Chavel, E. Cambril, and H. Launois, "Blazed binary subwavelength gratings with efficiencies larger than those of conventional echelette gratings," Opt. Lett. 23, 1081Lett. 23, -1083Lett. 23, (1998. 5. S. Astilean, P. Lalanne, P. Chavel, E. Cambril, and H. Launois, "High-efficiency subwavelength diffractive element patterned in a high-refractive-index material for 633 nm," Opt. Lett. 23, 552-554 (1998). 6. P. Lalanne, S. Astilean, P. Chavel, E. Cambril, and H. Launois, "Design and fabrication of blazed binary diffractive elements with sampling periods smaller than the structural cutoff," J. Opt. Soc. Am. A 16, 1143Am. A 16, -1156Am. A 16, (1999

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“…This approach typically requires densely-packed micrometertall nanostructures, which are challenging to fabricate and implement into a robust device. High refractive index materials such as silicon allows reduction of the thickness while still keeping it on the order of half micron or above and maintaining a high aspect ratio (typically >1) [101,102]. Another approach for phase control with structured dielectric surfaces relies on rotating grating elements and Pancharatnam-Berry (PB) phase, as previously introduced.…”

Section: Metasurfaces Based On Resonant Dielectric Elementsmentioning

confidence: 99%

Traditional and emerging materials for optical metasurfaces

et al. 2017

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Abstract:One of the most promising and vibrant research areas in nanotechnology has been the field of metasurfaces. These are two dimensional representations of metaatoms, or artificial interfaces designed to possess specialized electromagnetic properties which do not occur in nature, for specific applications. In this article, we present a brief review of metasurfaces from a materials perspective, and examine how the choice of different materials impact functionalities ranging from operating bandwidth to efficiencies. We place particular emphasis on emerging and non-traditional materials for metasurfaces such as high index dielectrics, topological insulators and digital metamaterials, and the potentially transformative role they could play in shaping further advances in the field. General Introduction to optical metasurfacesUnexpected and unusual effects have been recently reported in various fields of research, such as but not limited to acoustics, seismology, thermal physics, and electromagnetism. At the heart of these developments is a progres- sive understanding of the wave-matter interaction and our ability to artificially manipulate it, particularly at small length scales. This has in turn been largely driven by the discovery and engineering of materials at extreme limit. These "metamaterials" possess exotic properties that go beyond conventional or naturally occurring materials. Encompassing many new research directions, the field of metamaterials is rapidly expanding, and therefore, writing a complete review on this subject is a formidable task; here instead, we present a comprehensive review in which we discuss the progress and the emerging materials for metasurfaces, i.e. artificially designed ultrathin two dimensional optical metamaterials with customizable functionalities to produce designer outputs. Metasurfaces are often considered as the two dimensional versions of 3D metamaterials. The former, also known as frequency selective surfaces, or reflectand transmit-arrays in the microwave community [1-6], which has been recently shown to produce a variety of spectacular optical effects ranging from negative refraction [7], super/hyper-lensing [8][9][10], optical mirages to cloaking [11][12][13][14][15][16][17][18][19], are comprised of artificial materials engineered at the subwavelength scale to guide light along any arbitrary direction. The functionalities of individual optical components, which were previously essentially determined by the optical properties of materials, can now be specified at will. Effective material optical parameters can be rigorously derived via homogenization techniques by averaging the electromagnetic fields over a subwavelength volume encompassing each individual element of the periodic ensemble of resonant inclusions, with arbitrary geometry [12,[15][16][17][18][19]. Thus although metamaterials can be tailored for exotic optical functions, the basic mechanism responsible for shaping the optical wavefronts remains the same as that in conventional refractive optics: it is b...

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All-dielectric subwavelength metasurface focusing lens

Cited by 281 publications

References 28 publications

Multiwavelength polarization-insensitive lenses based on dielectric metasurfaces with meta-molecules

Multiwavelength polarization-insensitive lenses based on dielectric metasurfaces with meta-molecules

High efficiency double-wavelength dielectric metasurface lenses with dichroic birefringent meta-atoms

Traditional and emerging materials for optical metasurfaces

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