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Displaying 1 - 17 of 17

Multifunctional metasurfaces enabled by simultaneous and independent control of phase and amplitude for orthogonal polarization states

May 25, 2021
Author(s)
Mingze Liu, Wenqi Zhu, Pengcheng Huo, Lei Feng, Maowen Song, Cheng Zhang, Lu Chen, Henri Lezec, Yanqing Lu, Amit Agrawal, Ting Xu
Monochromatic light can be characterized by its three fundamental properties: amplitude, phase and polarization. In this work, we propose a versatile, transmission-mode all-dielectric metasurface platform that can independently manipulate the phase and

Broadband generation of perfect Poincare beams via dielectric spin-multiplexed metasurface

April 13, 2021
Author(s)
Mingze Liu, Pengcheng Huo, Wenqi Zhu, Cheng Zhang, Si Zhang, Maowen Song, Song Zhang, Qianwei Zhou, Lu Chen, Henri Lezec, Amit Agrawal, Yanqing Lu, Ting Xu
Poincaré beam, which describes the space-variant polarization of a light beam carrying spin angular momentum (SAM) and orbital angular momentum (OAM), plays an important role in various optical applications. Since the radius of a Poincaré beam depends on

Independent Amplitude Control of Arbitrary Orthogonal States of Polarization via Dielectric Metasurfaces

December 23, 2020
Author(s)
Qingbin Fan, Mingze Liu, Cheng Zhang, Wenqi Zhu, Yilin Wang, Peicheng Lin, Feng Yan, Lu Chen, Henri Lezec, Yanqing Lu, Amit Agrawal, Ting Xu
Exquisite polarization control using optical metasurfaces has attracted considerable attention thanks to their ability to manipulate multichannel independent wavefronts with subwavelength resolution. Here we present a new class of metasurface polarization

Photorealistic full-color nanopainting enabled by a low-loss metasurface

September 4, 2020
Author(s)
Pengcheng Huo, Maowen Song, Wenqi Zhu, Cheng Zhang, Lu Chen, Henri Lezec, Yanqing Lu, Amit Agrawal, Ting Xu
We design and experimentally demonstrate a TiO2 metasurface that enables full-color generation and ultrasmooth color brightness variations. The reproduced famous artwork "girl with a pearl earring" features photorealistic color representation and

Plasmon Lasers

August 26, 2020
Author(s)
Wenqi Zhu, Shawn M. Divitt, Matthew S. Davis, Cheng Zhang, Ting Xu, Henri Lezec, Amit Agrawal
Recent advancements in the ability to design, fabricate and characterize optical and optoelectronic devices at the nanometer scale have led to tremendous developments in the miniaturization of optical systems and circuits. Development of wavelength scale

Low-loss Metasurface Optics down to the Deep Ultraviolet

August 9, 2020
Author(s)
Cheng Zhang, Shawn M. Divitt, Qingbin Fan, Wenqi Zhu, Amit Agrawal, Yanqing Lu, Ting Xu, Henri Lezec
Metasurfaces, planar arrays of subwavelength electromagnetic structures that collectively mimic the functionality of much thicker conventional optical elements, have been demonstrated at frequencies ranging from the microwave up to the visible. Here, we

Broadband detection of multiple spin and orbital angular momenta via dielectric metasurface

July 26, 2020
Author(s)
Si Zhang, Pengcheng Huo, Wenqi Zhu, Cheng Zhang, Peng Chen, Mingze Liu, Lu Chen, Henri Lezec, Amit Agrawal, Yanqing Lu, Ting Xu
Light beams carrying spin angular momentum (SAM) and orbital angular momentum (OAM) have created novel opportunities in the areas of optical communications, imaging, micromanipulation and quantum optics. However, complex optical setups are required to

Photonic spin-multiplexing metasurface for switchable spiral phase contrast imaging

March 10, 2020
Author(s)
Pengcheng Huo, Cheng Zhang, Wenqi Zhu, Mingze Liu, Song Zhang, Si Zhang, Lu Chen, Henri Lezec, Amit Agrawal, Yanqing Lu, Ting Xu
As the two most representative operation modes in an optical imaging system, bright-field imaging and phase contrast imaging can address different dimensionalities of an object. Developing a miniature and low-cost system capable of switching between these

Ultra-compact visible light depolarizer based on dielectric metasurface

February 4, 2020
Author(s)
Yilin Wang, Wenqi Zhu, Cheng Zhang, Qingbin Fan, Lu Chen, Henri Lezec, Amit Agrawal, Ting Xu
With rapid development towards shrinking the size of traditional photonic systems such as cameras, spectrometers, displays and illumination systems, there is an urgent need for high performance and ultra-compact functional optical elements. The large

Ultrathin Wetting Layer-Free Plasmonic Gold Films

October 3, 2019
Author(s)
Robert Lemasters, Cheng Zhang, Manoj Manjare, Wenqi Zhu, Junyeob Song, Sergei Urazhdin, Henri Lezec, Amit Agrawal, Hayk Harutyunyan
Ultrathin gold films are attractive for plasmonic and metamaterial devices, thanks to their useful optical and optoelectronic properties. However, deposition of ultrathin continuous Au films of few nanometer thickness is challenging and generally requires

Revisiting the Photon-Drag Effect in Metal Films

August 2, 2019
Author(s)
Jared H. Strait, Glenn E. Holland, Wenqi Zhu, Cheng Zhang, Bojan R. Ilic, Amit K. Agrawal, Domenico Pacifici, Henri J. Lezec
The photon-drag effect, the rectified current in a medium induced by conservation of momentum of absorbed or redirected light, is a unique probe of the detailed mechanisms underlying radiation pressure. We revisit this effect in gold, a canonical Drude

Ultrafast Optical Pulse Shaping using Dielectric Metasurfaces

May 2, 2019
Author(s)
Shawn M. Divitt, Wenqi Zhu, Cheng Zhang, Henri Lezec, Amit Agrawal
Simultaneous control of individual frequency-comb lines, and their modulation at the repetition-rate of an ultrafast laser represents the ultimate limit of optical pulse shaping. Remarkable progress in mode-locked lasers and chirped pulse amplifiers

Broadband generation of photonic spin-controlled arbitrary accelerating light beams in the visible

February 13, 2019
Author(s)
Qingbin Fan, Wenqi Zhu, Yuzhang Liang, Pengcheng Huo, Cheng Zhang, Amit Agrawal, Kun Huang, Xiangang Luo, Yanqing Lu, Chengwei Qiu, Henri Lezec, Ting Xu
Bending light along arbitrary curvatures is a captivating and popular notion, triggering unprecedented endeavors in achieving quasi-diffraction-free propagation along a curved path in free-space. Much effort has been devoted to achieving this goal in

Robust Extraction of Hyperbolic Metamaterial Permittivity using Total Internal Reflection Ellipsometry

June 20, 2018
Author(s)
Cheng Zhang, Nina Hong, Chengang Ji, Wenqi Zhu, Xi Chen, Amit K. Agrawal, Zhong Zhang, Tom E. Tiwald, Stefan Schoeche, James N. Hilfiker, L. Jay Guo, Henri J. Lezec
Hyperbolic metamaterials are optical materials characterized by highly anisotropic effective permittivity tensor components having opposite signs along orthogonal directions. The techniques currently employed for characterizing the optical properties of

Surface plasmon polariton laser based on a metallic trench Fabry-Perot resonator

October 6, 2017
Author(s)
Wenqi Zhu, Ting Xu, Haozhu Wang, Cheng Zhang, Parag B. Deotare, Amit K. Agrawal, Henri J. Lezec
Recent years have witnessed growing interest in the development of lasers with small footprint for their potential applications in small-volume sensing and on-chip optical communications. Surface-plasmons – electromagnetic modes evanescently confined to