Publications (28)
Thermally-Switchable Metalenses Based on Quasi-Bound States in the Continuum
Stephanie C. Malek, Cheng-Chia Tsai, Nanfang Yu
Dynamic wavefront shaping with optical metasurfaces has presented a major challenge and inspired a large number of highly elaborate solutions. Here, we experimentally demonstrate t…
High efficiency near diffraction-limited mid-infrared flat lenses based on metasurface reflectarrays
Shuyan Zhang, Myoung-Hwan Kim, Francesco Aieta +9
A limiting factor in the development of mid-infrared optics is the lack of abundant materials that are transparent, low cost, lightweight, and easy to machine. In this paper, we de…
Large tuning of the optical properties of nanoscale NdNiO3 via electron doping
Yeonghoon Jin, Teng Qu, Siddharth Kumar +6
We synthesized crystalline films of neodymium nickel oxide (NdNiO3), a perovskite quantum material, switched the films from a metal phase (intrinsic) into an insulator phase (elect…
A review of metasurfaces: physics and applications
Hou-Tong Chen, Antoinette J Taylor, Nanfang Yu
Metamaterials are composed of periodic subwavelength metal/dielectric structures that resonantly couple to the electric and/or magnetic components of the incident electromagnetic f…
A Mid-Infrared Platform Based on Strontium Tweezer Arrays
Aaron Holman, Ximo Sun, Bojeong Seo +8
Subwavelength atomic tweezer arrays, in which atoms can be positioned at distances smaller than their emission wavelength, have been proposed as a versatile platform to study colle…
Active Nonlocal Metasurfaces
Stephanie C. Malek, Adam C. Overvig, Sajan Shrestha +1
Actively tunable and reconfigurable wavefront shaping by optical metasurfaces poses a significant technical challenge often requiring unconventional materials engineering and nanof…
Compute-first optical detection for noise-resilient visual perception
Jungmin Kim, Nanfang Yu, Zongfu Yu
In the context of visual perception, the optical signal from a scene is transferred into the electronic domain by detectors in the form of image data, which are then processed for…
Selection Rules for Quasi-Bound States in the Continuum
Adam C. Overvig, Stephanie C. Malek, Michael J. Carter +2
Photonic crystal slabs (PCSs) are a well-studied class of devices known to support optical Fano resonances for light normally incident to the slab, useful for narrowband filters, m…
Metasurface Holographic Optical Traps for Ultracold Atoms
Xiaoyan Huang, Weijun Yuan, Aaron Holman +6
We propose metasurface holograms as a novel platform to generate optical trap arrays for cold atoms with high fidelity, efficiency, and thermal stability. We developed design and f…
Enhanced Harmonic Generation in Gases Using an All-Dielectric Metasurface
Jared S. Ginsberg, Adam C. Overvig, M. Mehdi Jadidi +5
Strong field-confinement, long-lifetime resonances, and slow-light effects suggest that meta surfaces are a promising tool for nonlinear optical applications. These nanostructured…
Aberration-free ultra-thin flat lenses and axicons at telecom wavelengths based on plasmonic metasurfaces
Francesco Aieta, Patrice Genevet, Mikhail A. Kats +4
The concept of optical phase discontinuities is applied to the design and demonstration of aberration-free planar lenses and axicons, comprising a phased array of ultrathin subwave…
Trapping of Single Atoms in Metasurface Optical Tweezer Arrays
Aaron Holman, Yuan Xu, Ximo Sun +6
Optical tweezer arrays have emerged as a key experimental platform for quantum computation, quantum simulation, and quantum metrology, enabling unprecedented levels of control over…
Metasurface Smart Glass for Object Recognition
Cheng-Chia Tsai, Xiaoyan Huang, Zhicheng Wu +2
Recent years have seen a considerable surge of research on developing heuristic approaches to realize analog computing using physical waves. Among these, neuromorphic computing usi…
Inverse design of dielectric metasurface by spatial coupled mode theory
Zhicheng Wu, Xiaoyan Huang, Nanfang Yu +1
Modeling metasurfaces with high accuracy and efficiency is challenging because they have features smaller than the wavelength but sizes much larger than the wavelength. Full wave s…
Physically Grounded Monocular Depth via Nanophotonic Wavefront Encoding
Bingxuan Li, Jiahao Wu, Yuan Xu +6
Depth foundation models (DFMs) offer strong learned priors for 3D perception from single RGB images but lack physical depth cues, leading to ambiguities in metric scale. We introdu…
Physical and Behavioral Adaptations to Prevent Overheating of the Living Wings of Butterflies
Cheng-Chia Tsai, Richard A. Childers, Norman Nan Shi +5
The wings of Lepidoptera contain a matrix of living cells whose function requires appropriate temperatures. However, given their small thermal capacity, wings can overheat rapidly…
Metasurface-assisted phase-matching-free second harmonic generation in lithium niobate waveguides
Cheng Wang, Zhaoyi Li, Myoung-Hwan Kim +5
The phase-matching condition is a key aspect in nonlinear wavelength conversion processes, which requires the momenta of the photons involved in the processes to be conserved. Conv…
Scalable, "Dip-and-dry" Fabrication of a Wide-Angle Plasmonic Selective Absorber for High-efficiency Solar-Thermal Energy Conversion
Jyotirmoy Mandal, Derek Wang, Adam C. Overvig +7
A galvanic displacement reaction-based, room-temperature "dip-and-dry" technique is demonstrated for fabricating selectively solar-absorbing plasmonic nanostructure-coated foils (P…
Leaky-wave metasurfaces for integrated photonics
Heqing Huang, Adam C. Overvig, Yuan Xu +4
Metasurfaces have been rapidly advancing our command over the many degrees of freedom of light within compact, lightweight devices. However, so far, they have mostly been limited t…
Multifunctional Resonant Wavefront-Shaping Meta-Optics Based on Multilayer and Multi-Perturbation Nonlocal Metasurfaces
Stephanie C. Malek, Adam C. Overvig, Andrea Alù +1
Photonic devices rarely provide both elaborate spatial control and sharp spectral control over an incoming wavefront. In optical metasurfaces, for example, the localized modes of i…
Chiral Quasi-Bound States in the Continuum
Adam Overvig, Nanfang Yu, Andrea Alu
Quasi-bound states in the continuum (q-BICs) are resonant states of suitably tailored nanostructures with long optical lifetimes controlled by symmetry-breaking perturbations. Whil…
Li4Ti5O12: A Visible-to-Infrared Broadband Electrochromic Material for Optical and Thermal Management
Jyotirmoy Mandal, Sicen Du, Martin Dontigny +3
Broadband electrochromism from visible to infrared wavelengths is attractive for applications like smart windows, thermal-camouflage, and temperature control. In this work, the bro…
Inverse Designed WS2 Planar Chiral Metasurface with Geometric Phase
Jaegang Jo, Sangbin Lee, Munseong Bae +5
Increasing attention is being paid to chiral metasurfaces due to their ability to selectively manipulate right-hand circularly polarized light or left-hand circularly polarized lig…
Dielectric Metasurfaces for Complete and Independent Control of Optical Amplitude and Phase
Adam C. Overvig, Sajan Shrestha, Stephanie C. Malek +4
Metasurfaces are optically thin metamaterials that promise complete control of the wavefront of light but are primarily used to control only the phase of light. Here, we present an…
Targeted Sub-attomole Cancer Biomarker Detection based on Phase Singularity 2D Nanomaterial-enhanced Plasmonic Biosensor
Yuye Wang, Shuwen Zeng, Aurelian Crunteanu +11
Detection of small cancer biomarkers with low molecular weight and a low concentration range has always been challenging yet urgent in many clinical applications such as diagnosing…
Multifunctional Nonlocal Metasurfaces
Adam C. Overvig, Stephanie C. Malek, Nanfang Yu
Diffractive photonic devices manipulate light via local and nonlocal optical modes. Local devices, such as metasurfaces, can shape a wavefront at multiple selected wavelengths, but…
A subsurface array of photonic crystal slabs produces green stripes in a scarab beetle
Laura Ospina-Rozo, Nicola S. Kubzdela, Zezheng Zhu +4
Vivid colours in nature often arise from photonic nanostructures that have inspired diverse technologies. Yet most known examples fall within a limited set of structural themes. He…
Giant birefringence in optical antenna arrays with widely tailorable optical anisotropy
Mikhail A. Kats, Patrice Genevet, Guillaume Aoust +5
The manipulation of light by conventional optical components such as a lenses, prisms and wave plates involves engineering of the wavefront as it propagates through an optically-th…