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Physics

Optical physics and communications

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Displaying 201 - 225 of 853

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

Ultrafast waveform metrology: A first international comparison

August 24, 2020
Author(s)
Mark Bieler, Paul Struszewski, Ari Feldman, Jeffrey Jargon, Paul D. Hale, Pengwei Gong, Wen Xie, Chuntao Yang, Zhigang Feng, Kejia Zhao, Zhijun Yang
We report on the first international comparison in ultrafast waveform metrology. To this end, the frequency and time responses of a photodiode with a nominal bandwidth of 100 GHz have been measured by several National Metrology Institutes during the last

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

3D printed optical concentrators for LED arrays

July 19, 2020
Author(s)
Behrang H. Hamadani, Jonathan E. Seppala, Clarence J. Zarobila
Additive manufacturing methods based on photopolymerization offer a great potential for fabrication of high quality, highly transparent optical components. One appropriate use of these technologies is related to fabrication of parts that can be used in

Microresonator enhanced, waveguide coupled emission from silicon defect centers for superconducting optoelectronic networks

July 10, 2020
Author(s)
Alexander N. Tait, Sonia M. Buckley, Jeffrey M. Shainline, Adam N. McCaughan, Jeffrey T. Chiles, Sae Woo Nam, Richard P. Mirin
Superconducting optoelectronic networks could achieve scales unmatched in hardware-based neuromorphic computing. After summarizing recent progress in this area, we report new results in cryogenic silicon photonic light sources, components central to these

Microring resonator-coupled photoluminescence from silicon W centers

July 10, 2020
Author(s)
Alexander N. Tait, Sonia M. Buckley, Jeffrey T. Chiles, Adam N. McCaughan, Sae Woo Nam, Richard P. Mirin, Jeffrey M. Shainline
Defect centers are promising candidates for waveguide-integrated silicon light sources. We demonstrate microresonator- and waveguide-coupled photoluminescence from silicon W centers. Observations indicate that wavelengths that are on-resonance with

Dissipative Kerr Solitons in a III-V Microresonator

June 22, 2020
Author(s)
Gregory T. Moille, Lin Chang, Weiqiang Xie, Ashutosh S. Rao, Xiyuan Lu, Marcelo I. Davanco, John E. Bowers, Kartik A. Srinivasan
We demonstrate stable microresonator Kerr solitons in a III-V platform through cryogenic quenching of the thermorefractive effect. Such phase-stable operation is critical to fully exploit the high nonlinearity and low loss available in this platform.

Dual-comb photoacoustic spectroscopy

June 19, 2020
Author(s)
Jacob T. Friedlein, Esther Baumann, Kimberly Briggman, Gabriel M. Colacion, Fabrizio R. Giorgetta, Daniel I. Herman, Nathan R. Newbury, Jeeseong Hwang, Ian R. Coddington, Kevin C. Cossel, Gabriel Ycas, Christopher Yung, Eli V. Hoenig, Edgar F. Perez, Aaron Goldfain
Spectrally-resolved photoacoustic imaging is a promising technique for label-free imaging in optically scattering materials. However, this technique often requires acquisition of a separate image at each wavelength of interest. This reduces imaging speeds

Quantum-enhanced interferometry with large heralded photon-number states

June 14, 2020
Author(s)
G Thekkadath, M.E. Mycroft, B.A. Bell, C.G. Wade, A. Eckstein, David Phillips, R.B Patel, A. Buraczewski, Adriana Lita, Thomas Gerrits, Sae Woo Nam, M. Stobinska, A.I. Lvovsky, Ian Walmsley
Quantum phenomena such as entanglement can improve fundamental limits on the sensitivity of a measurement probe. In optical interferometry, a probe consisting of N entangled photons provides up to a sqrt(N) enhancement in phase sensitivity compared to a

Evolution of transmitted depolarization in diffusely scattering media

June 1, 2020
Author(s)
Thomas A. Germer
We performed Mueller matrix Monte Carlo simulations of the propagation of optical radiation in diffusely scattering media for collimated incidence and report the results as a function of thickness and the angle subtended by the detector. For sufficiently

Effect of Teflon(R) Transmittance on Sensitivity of Thermoluminescence Dosimeter Cards

May 20, 2020
Author(s)
Vyacheslav B. Podobedov, Carl C. Miller, Alexander Romanyukha, Andrew Hoy
Thermoluminescence dosimeter cards purchased by the United States Navy in recent years have different radiation sensitivities, e.g. they exhibit a different amount of light per dose unit. Presented tests indicate that the optical transparency of the Teflon

High-Q dark hyperbolic phonon-polaritons in hexagonal boron nitride nanostructures

May 18, 2020
Author(s)
Georg Ramer, Mohit Tuteja, Joseph R. Matson, Marcelo I. Davanco, Thomas G. Folland, Andrey Kretinin, Takashi Taniguchi, Kenji Watanabe, Kostya Novoselov, Joshua D. Caldwell, Andrea Centrone
The anisotropy of hexagonal boron nitride (hBN) crystals gives rise to hyperbolic phonon polaritons (HPhPs), notable for their volumetric frequency-dependent angular propagation and strong confinement. For frustum (truncated nanocone) structures, theory

Photocurrent detection of the orbital angular momentum of light

May 15, 2020
Author(s)
Zhurun Ji, Wenjing Liu, Sergiy Krylyuk, Xiaopeng Fan, Zhifeng Zhang, Anlian Pan, Liang Feng, Albert Davydov, Ritesh Agarwal
Utilizing the orbital angular momentum (OAM) of light is promising for increasing the bandwidth of optical communication networks. However, direct photocurrent detection of different OAM modes has not yet been demonstrated. Most studies on current
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