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Search Publications by Amit Agrawal

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Displaying 1 - 25 of 30

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

Pengcheng Huo, Maowen Song, Wenqi Zhu, Cheng Zhang, Lu Chen, Henri J. Lezec, Yanqing Lu, Amit K. Agrawal, Ting Xu
We design and experimentally demonstrate a TiO2 metasurface that enables full-color generation and ultrasmooth color brightness variations. The reproduced

Plasmon Lasers

Wenqi Zhu, Shawn M. Divitt, Matthew S. Davis, Cheng Zhang, Ting Xu, Henri J. Lezec, Amit K. Agrawal
Recent advancements in the ability to design, fabricate and characterize optical and optoelectronic devices at the nanometer scale have led to tremendous

Low-loss Metasurface Optics down to the Deep Ultraviolet

Cheng Zhang, Shawn M. Divitt, Qingbin Fan, Wenqi Zhu, Amit K. Agrawal, Yanqing Lu, Ting Xu, Henri J. Lezec
Metasurfaces, planar arrays of subwavelength electromagnetic structures that collectively mimic the functionality of much thicker conventional optical elements

Ultra-compact visible light depolarizer based on dielectric metasurface

Yilin Wang, Wenqi Zhu, Cheng Zhang, Qingbin Fan, Lu Chen, Henri J. Lezec, Amit K. 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

Ultrathin Wetting Layer-Free Plasmonic Gold Films

Robert Lemasters, Cheng Zhang, Manoj Manjare, Wenqi Zhu, Junyeob Song, Sergei Urazhdin, Henri J. Lezec, Amit K. Agrawal, Hayk Harutyunyan
Ultrathin gold films are attractive for plasmonic and metamaterial devices, thanks to their useful optical and optoelectronic properties. However, deposition of

Revisiting the Photon-Drag Effect in Metal Films

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

Ultrafast Optical Pulse Shaping using Dielectric Metasurfaces

Shawn M. Divitt, Wenqi Zhu, Cheng Zhang, Henri J. Lezec, Amit K. Agrawal
Simultaneous control of individual frequency-comb lines, and their modulation at the repetition-rate of an ultrafast laser represents the ultimate limit of

Origins and Demonstrations of Electrons with Orbital Angular Momentum

Benjamin McMorran, Amit K. Agrawal, Peter Ercius, Vincenzo Grillo, Andrew A. Herzing, Tyler R. Harvey, Martin Linck
The surprising message of the 1992 paper of Allen, Beijersbergen, Spreeuw, and Woerdman (ABSW) was that photons could exhibit orbital motion in free space

Steady State Vapor Bubble in Pool Boiling

An Zou, Ashish Chanana, Amit K. Agrawal, Peter C. Wayner, Jr., Shalabh C. Maroo
Boiling, a dynamic and multiscale process, has been studied for over five decades; however, a comprehensive understanding of the process is still lacking. The

High-contrast and fast electrochromic switching enabled by plasmonics

Ting Xu, Erich C. Walter, Amit K. Agrawal, Christopher C. Bohn, Jeyavel Velmurugan, Wenqi Zhu, Henri J. Lezec, Albert A. Talin
With vibrant colours and simple, room-temperature processing methods, electrochromic polymers have attracted attention as active materials for flexible, low

Efficient diffractive phase optics for electrons

Tyler R. Harvey, Jordan S. Pierce, Amit K. Agrawal, Benjamin McMorran, Peter Ercius, Martin Linck
Electron diffraction gratings can be used to imprint well-defined phase structure onto an electron beam. For example, diffraction gratings have been used to