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Physics

Optical physics and communications

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  • Published Date
Displaying 226 - 250 of 1595

Spatial frequency domain Mueller matrix imaging

April 22, 2021
Author(s)
Joseph Chue-Sang, Aaron Goldfain, Jeeseong C. Hwang, Thomas A. Germer
We combine Mueller matrix polarimetry (MMP) with spatial frequency domain imaging (SFDI) to create a technique that is sensitive to near-surface material anisotropy. We demonstrate this imaging modality with scattering and absorbing phantoms and with a

Far-field interference of a neutron white beam and the applications to noninvasive phase-contrast imaging

April 21, 2021
Author(s)
Michael G. Huber, Daniel S. Hussey, Muhammad D. Arif, David L. Jacobson, Jacob LaManna, Wakana Ueno, Han Wen, Dmitry Pushin, Dusan Sarenac, David Cory, Houxun Miao, Takenao Shinohara, Joseph Parker
The phenomenon of interference plays a crucial role in the field of precision measurement science. Waveparticle duality has expanded the well-known interference effects of electromagnetic waves to massive particles. The majority of the wave-particle

Three Phase-Grating Moire Neutron Interferometer for Large InterferometerArea Applications

April 21, 2021
Author(s)
Michael G. Huber, D. Sarenac, D. A. Pushin, Houxun Miao, Daniel S. Hussey, D G. Cory, Muhammad D. Arif, David L. Jacobson, Jacob LaManna, Ben Heacock
We demonstrate a three phase-grating neutron interferometer as a robust candidate for large area interferometry applications and characterization of materials. This novel far- eld moire technique allows for broad wavelength acceptance and relaxed

Practical quantum-enhanced receivers for classical communication

April 20, 2021
Author(s)
Ivan Burenkov, Jabir Marakkarakath Vadakkepurayil, Sergey Polyakov
Communication is an integral part of human life. Today, optical pulses are the preferred information carriers for long-distance communication. The exponential growth in data leads to a "capacity crunch" in the underlying physical systems. One of the

Characterization and Absolute Calibration of an AERONET-OC Radiometer

April 15, 2021
Author(s)
B. Carol Johnson, Giuseppe Zibordi, Steven W. Brown, Michael Feinholz, Mikhail Sorokin, Ilya Slutsker, John T. Woodward IV, Howard Yoon
The Ocean Color component of the global Aerosol Robotic Network (AERONET-OC) utilizes CE-318 sun photometers modified for above-water radiometry from fixed structures such as oil rigs, lighthouses, and service platforms. Primarily, AERONET-OC measurements

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

Inverse-designed multi-dimensional silicon photonic transmitters

March 25, 2021
Author(s)
Travis Briles, Jordan Stone, Scott Papp
Modern microelectronic processors have migrated towards parallel computing architectures with many-core processors. However, such expansion comes with diminishing returns exacted by the high cost of data movement between individual processors. The use of

Fully phase-stabilized 1 GHz turnkey frequency comb at 1.5 mm

March 15, 2021
Author(s)
Daniel Lesko, Alexander Lind, Nazanin Hoghooghi, Abijith S. Kowligy, Henry R. Timmers, Pooja Sekhar, Benjamin Rudin, Florian Emaury, Gregory B. Rieker, Scott Diddams
Low noise and high repetition rate optical frequency combs have been desirable for many applications from timekeeping to precision spectroscopy. With higher power per comb mode, gigahertz repetition rates enable rapid spectroscopic sensing in a dual-comb

Optimizing optical precision of an image using curved focal plane technology

March 14, 2021
Author(s)
Sujay Swain, Sudhish Swain, Dianne L. Poster, Michael T. Postek
The quality of an image captured by the human eye is typically better than that obtained relative to artificial images created by cameras or telescopes. This is because humans have curved retinas. In contrast, conventional imaging cameras have at sensors

Broadband thermomechanically limited sensing with an optomechanical accelerometer

March 9, 2021
Author(s)
Feng Zhou, Yiliang Bao, Ramgopal Madugani, David Long, Jason J. Gorman, Thomas W. LeBrun
Cavity optomechanics has enabled precision measurements with unprecedented levels of sensitivity, including the detection of attonewton forces, nanoparticles, magnetic fields, and gravitational waves. In most cases, detection is performed in a narrow

Comparative study of multiwall carbon nanotube nanocomposites by Raman, SEM, and XPS measurement techniques

March 3, 2021
Author(s)
Yanmei Piao, Vipin Tondare, Chelsea S. Davis, Justin Gorham, Elijah Petersen, Jeffrey W. Gilman, Keana Scott, Andras Vladar, Angela R. Hight Walker
Substantial ongoing research efforts are investigating the production of novel composite material enhanced by the incorporation of nanomaterial fillers such as multiwall carbon nanotubes (MWCNTs). While the addition of MWCNTs have been shown to improve the