Dr. Amr M. Shaltout Profile

Dr. Amr M. Shaltout

Postdoctoral Scholar at Stanford Univ

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Author

Publications (7)

Proceedings Article | 17 September 2018 Presentation

Spin controlled transmission in dielectric metasurfaces (Conference Presentation)

Amr Shaltout, Jorik van de Groep, Yefei Wang, Mark Brongersma

Proceedings Volume 10719, 1071916 (2018) https://doi.org/10.1117/12.2321236

KEYWORDS: Dielectrics, Silicon, Phase shifts, Geometrical optics, Biosensing, Structural analysis, Crystals, Magnetism, Antennas, Mie scattering

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Proceedings Article | 29 September 2017 Open Access

Enhanced nonlinearities in transparent conducting oxides for ultrafast photonics (Conference Presentation)

Clayton DeVault, Nathaniel Kinsey, Lucia Caspani, Matteo Clerici, Kaipurath Muhammad Rishad, Thomas Roger, Enrico Carnemolla, Jongbum Kim, Amr Shaltout, Monica Pietrzyk, Andrea Di Falco, Daniele Faccio, Alexandra Boltasseva, Marcello Ferrera, Vladimir Shalaev

Proceedings Volume 10345, 103450Z (2017) https://doi.org/10.1117/12.2274061

KEYWORDS: Ultrafast phenomena, Plasmonics, Transparent conducting oxide, Thin films, Nonlinear optics, Ultrafast laser spectroscopy, Nonlinear control, Metals, Photonics, Control systems

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Proceedings Article | 25 September 2017 Presentation

Laser scanning using spatiotemporal beam dynamics in metasurfaces (Conference Presentation)

Amr Shaltout, Konstantinos Lagoudakis, Soo Jin Kim, Jelena Vuckovic, Vladimir Shalaev, Mark Brongersma

Proceedings Volume 10343, 1034309 (2017) https://doi.org/10.1117/12.2273633

KEYWORDS: Laser scanners, Beam steering, Phased array optics, Phase shift keying, Continuous wave operation, 3D printing, Rapid manufacturing, LIDAR, Mirrors, Electrooptic modulators

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Proceedings Article | 9 November 2016 Open Access

New material platforms and metasurface designs for nano- and quantum photonics (Conference Presentation)

Vladimir Shalaev, Nathaniel Kinsey, Amr Shaltout, Urcan Guler, Jongbum Kim, Simeon Bogdanov, Mikhail Shalaginov, Alexandra Boltasseva

Proceedings Volume 9920, 99200S (2016) https://doi.org/10.1117/12.2235482

KEYWORDS: Nanophotonics, Plasmonics, Photonics, Metamaterials, Nanotechnology, Current controlled current source

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Proceedings Article | 9 November 2016 Presentation

Oxides in plasmonics and nanophotonics: materials and dynamic devices (Conference Presentation)

Alexandra Boltasseva, Nathaniel Kinsey, Matteo Cleirci, Marcello Ferrera, Jongbum Kim, Clayton DeVault, Amr Shaltout, Daniele Faccio, Vladimir Shalaev

Proceedings Volume 9920, 99200J (2016) https://doi.org/10.1117/12.2235414

KEYWORDS: Nanophotonics, Plasmonics, Metamaterials, Ultrafast phenomena, Optical components, Oxides, Transparent conducting oxide, Electronics, Near infrared, Infrared radiation

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Transparent conducting oxides (TCOs) have long been used in optics and electronics for their unique combination of both high transmission and high electrical conductivity. In recent years, the impact of such TCOs has been felt in the subgenre of nanophotonics and plasmonics.1-3 Specifically, the TCOs provide plasmonic response in the near infrared and infrared region,4 epsilon-near-zero (ENZ) properties in the telecom band, tunable static optical properties through deposition/annealing control,5 and the potential for dynamic control of their properties under electrical or optical biasing.6-8 Due to the combination of these interesting properties, TCOs such as In:SnO (ITO), Al:ZnO (AZO), and Ga:ZnO (GZO) have become leaders in the drive to produce high-performance dynamic and alternative nanophotonic devices and metamaterials. In our work, we have studied the potential for optical control of AZO thin films using both above bandgap and below bandgap excitation, noting strong changes in reflection/transmission with enhancement due to the ENZ as well as ultrafast response times less than 1 ps. Using a photo-modified carrier density and recombination to model above bandgap excitation, we demonstrated 40%/30% change in the reflection/transmission of a 350 nm AZO film with an 88 fs recombination time, corresponding to a modification of the carrier density by 10%.6 Below bandgap excitation has experimentally shown the potential for similar variations in the reflection and transmission under increased fluences with a factor of ~8x increase in the normalized ΔR at ENZ. Current efforts are focused to model the material response as well as to investigate electrical modulation of AZO films. In summary, our work has demonstrated the potential for optical control of AZO films both above and below bandgap on an ultrafast timescale which can be enhanced through ENZ. Combining this with traditional nanophotonic and metamaterial devices opens a broad range of high impact studies such as tunable optical components, on-chip photonic elements, and controllable nonlinear enhancement.

Proceedings Article | 26 July 2016 Presentation

Active metasurfaces for space-time photonic control (Conference Presentation)

Amr Shaltout, Alexander Kildishev, Vladimir Shalaev

Proceedings Volume 9884, 98841C (2016) https://doi.org/10.1117/12.2228383

KEYWORDS: Control systems, Polarization, Photons, Optical components, Photon polarization, Antennas, Optical engineering, Communication engineering, Spectroscopy, Biosensing, Quantum communications

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Proceedings Article | 11 September 2013 Paper

Experimental validation of a new bianisotropic parameter retrieval technique using plasmonic metasurfaces made of V-shape antennas

Jingjing Liu, Amr Shaltout, Xingjie Ni, Vladimir Shalaev, Alexander Kildishev

Proceedings Volume 8806, 88060F (2013) https://doi.org/10.1117/12.2024695

KEYWORDS: Antennas, Polarization, Magnetism, Plasmonics, Metamaterials, Electromagnetism, Phase shifts, Etching, Nanotechnology, Optical components

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Showing 5 of 7 publications

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