Amir Arbabi
YOU?
Author Swipe
View article: Full Wafer Scale Manufacturing of Directly Printed TiO<sub>2</sub> Metalenses at Visible Wavelengths with Outstanding Focusing Efficiencies
Full Wafer Scale Manufacturing of Directly Printed TiO<sub>2</sub> Metalenses at Visible Wavelengths with Outstanding Focusing Efficiencies Open
Highly efficient metalens arrays designed for 550 nm are directly printed using UV‐assisted nanoimprint lithography (UV‐NIL) and a TiO 2 nanoparticle (NP)‐based ink on 8″ optical wafers with imprint times less than 5 min. Approximately one…
View article: Advances in Spectral Imaging: A Review of Techniques and Technologies
Advances in Spectral Imaging: A Review of Techniques and Technologies Open
Spectral imaging systems enable a significant leap forward in identifying and characterizing materials and objects through their unique spectral signatures. This review explores the advances in spectral imaging systems (SIS) designs, analy…
View article: On "Inconsistencies of metalens performance and comparison with conventional diffractive optics"
On "Inconsistencies of metalens performance and comparison with conventional diffractive optics" Open
It was recently claimed1 that reported focusing efficiency values of high numerical aperture metalenses are inconsistent with a theoretical bound, and their measurement results are incorrectly interpreted. We review the article and conclud…
View article: Roadmap for Optical Metasurfaces
Roadmap for Optical Metasurfaces Open
Metasurfaces have recently risen to prominence in optical research, providing unique functionalities that can be used for imaging, beam forming, holography, polarimetry, and many more, while keeping device dimensions small. Despite the fac…
View article: Visible Metalenses with High Focusing Efficiency Fabricated Using Nanoimprint Lithography
Visible Metalenses with High Focusing Efficiency Fabricated Using Nanoimprint Lithography Open
Metasurfaces enable precise control over the properties of light and hold promise for commercial applications. However, fabricating visible metasurfaces suitable for high‐volume production is challenging and requires scalable processes. Na…
View article: Tunable elastic dielectric metasurface lenses
Tunable elastic dielectric metasurface lenses Open
Metasurfaces comprise an array of meta-atoms in a stretchable polymer. The dimensions and shapes of the meta-atoms and the spacing are varied to obtain desired optical properties. Any optical wavefront, for different wavelengths, illuminat…
View article: Angle multiplexed metasurfaces
Angle multiplexed metasurfaces Open
A metasurface is defined by an array of scattering elements having a U shape, where the geometrical dimensions determining the U shape are determined according to the different phase profiles that the metasurface is meant to generate in re…
View article: Dispersionless and dispersion-controlled optical dielectric metasurfaces
Dispersionless and dispersion-controlled optical dielectric metasurfaces Open
Metasurfaces comprise an array of pillars in a lattice. The dimensions of the pillars and the spacing are varied to obtain desired optical properties. The dispersionless metasurfaces can focus optical light over a broad wavelength range. S…
View article: Conformal optical metasurfaces
Conformal optical metasurfaces Open
Structures for scattering light at multiple wavelengths are disclosed. Scattering elements are fabricated with different geometric dimensions and arrangements, to scatter or focus light at the the same focal distance for each wavelength, o…
View article: On-chip optical filter comprising Fabri-Perot resonator structure and spectrometer
On-chip optical filter comprising Fabri-Perot resonator structure and spectrometer Open
An on-chip optical filter having Fabri-Perot resonators and a spectrometer may include a first sub-wavelength grating (SWG) reflecting layer and a second SWG reflecting layer facing each other. A plurality of Fabri-Perot resonators are for…
View article: Method of manufacturing image sensor including nanostructure color filter
Method of manufacturing image sensor including nanostructure color filter Open
A method of manufacturing an image sensor includes: preparing a sensor substrate including: a sensor layer including a photosensitive cell; and a signal line layer including lines to receive electric signals from the photosensitive cell; f…
View article: Optical Phased Array Using Guided Resonance with Backside Reflectors
Optical Phased Array Using Guided Resonance with Backside Reflectors Open
Methods and systems for controlling the phase of electromagnetic waves are disclosed. A device can consist of a guided resonance grating layer, a spacer, and a reflector. A plurality of devices, arranged in a grid pattern, can control the …
View article: High-capacity free-space optical communications using wavelength- and mode-division-multiplexing in the mid-infrared region
High-capacity free-space optical communications using wavelength- and mode-division-multiplexing in the mid-infrared region Open
Due to its absorption properties in atmosphere, the mid-infrared (mid-IR) region has gained interest for its potential to provide high data capacity in free-space optical (FSO) communications. Here, we experimentally demonstrate wavelength…
View article: Free-space-coupled wavelength-scale disk resonators
Free-space-coupled wavelength-scale disk resonators Open
Optical microresonators with low quality factor ( Q $Q$ ) can be efficiently excited by and scatter freely propagating optical waves, but those with high Q $Q$ typically cannot. Here, we present a universal model for resonators int…
View article: Free-space-coupled wavelength-scale disk resonators
Free-space-coupled wavelength-scale disk resonators Open
Optical microresonators with low quality factor ($Q$) can be efficiently excited by and scatter freely propagating optical waves, but those with high $Q$ typically cannot. Here, we present a universal model for resonators interacting with …
View article: General Lossless Polarization and Phase Transformation Using Bilayer Metasurfaces
General Lossless Polarization and Phase Transformation Using Bilayer Metasurfaces Open
Metasurface optical elements enable wavefront control and polarization manipulation with subwavelength resolution. Metasurfaces made of linearly birefringent meta‐atoms such as rectangular nanoposts are commonly used to control phase and p…
View article: Large-scale parameterized metasurface design using adjoint optimization
Large-scale parameterized metasurface design using adjoint optimization Open
Optical metasurfaces are planar arrangements of subwavelength meta-atoms that implement a wide range of transformations on incident light. The design of efficient metasurfaces requires that the responses of and interactions among meta-atom…
View article: Snapshot spectral imaging with parallel metasystems
Snapshot spectral imaging with parallel metasystems Open
An array of cascaded metasurfaces implements a compact and lightweight spectral imager that acquires real-time videos.
View article: Up- and Down-Conversion between Intra- and Intervalley Excitons in Waveguide Coupled Monolayer WSe<sub>2</sub>
Up- and Down-Conversion between Intra- and Intervalley Excitons in Waveguide Coupled Monolayer WSe<sub>2</sub> Open
The presence of two spin-split valleys in monolayer (1L) transition metal dichalcogenide (TMD) semiconductors supports versatile exciton species classified by their spin and valley quantum numbers. While the spin-0 intravalley exciton, kno…
View article: Increasing efficiency of high numerical aperture metasurfaces using the\n grating averaging technique
Increasing efficiency of high numerical aperture metasurfaces using the\n grating averaging technique Open
One of the important advantages of optical metasurfaces over conventional\ndiffractive optical elements is their capability to efficiently deflect light\nby large angles. However, metasurfaces are conventionally designed using\napproaches …
View article: Modeling metasurfaces using discrete-space impulse response technique
Modeling metasurfaces using discrete-space impulse response technique Open
Metasurfaces are arrays of subwavelength meta-atoms that shape waves in a compact and planar form factor. Analysis and design of metasurfaces require methods for modeling their interactions with waves. Conventional modeling techniques assu…
View article: Modeling Metasurfaces Using Discrete-Space Impulse\nResponse Technique
Modeling Metasurfaces Using Discrete-Space Impulse\nResponse Technique Open
Metasurfaces are arrays of subwavelength\nmeta-atoms that shape\nwaves in a compact and planar form factor. Analysis and design of\nmetasurfaces require methods for modeling their interactions with\nwaves. Conventional modeling techniques …
View article: Supplementary document for Multifunctional 2.5D metastructures enabled by adjoint optimization - 4320487.pdf
Supplementary document for Multifunctional 2.5D metastructures enabled by adjoint optimization - 4320487.pdf Open
Supplementary Material
View article: Multifunctional 2.5D metastructures enabled by adjoint optimization
Multifunctional 2.5D metastructures enabled by adjoint optimization Open
Optical metasurfaces are two-dimensional arrays of meta-atoms that modify different characteristics of light such as phase, amplitude, and polarization. One intriguing feature that distinguishes them from conventional optical components is…
View article: Vectorial Holograms with a Dielectric Metasurface: Ultimate Polarization Pattern Generation
Vectorial Holograms with a Dielectric Metasurface: Ultimate Polarization Pattern Generation Open
Controlling the polarization of light has been of interest for various applications in laser materials processing, display systems, and spectroscopy among others. Despite great advancements, the level of control over the polarization of li…
View article: Compact Folded Metasurface Spectrometer
Compact Folded Metasurface Spectrometer Open
Recent advances in optical metasurfaces enable control of the wavefront, polarization and dispersion of optical waves beyond the capabilities of conventional diffractive optics. An optical design space that is poised to highly benefit from…