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Displaying 551 - 575 of 1598

Improving dielectric nano-resonator-based antireflection coatings for photovoltaics

September 19, 2018

Author(s)

Dongheon Ha, Nikolai B. Zhitenev

We demonstrate optical and electrical property enhancement of solar cells using a variety of dielectric nano-resonator array coatings. First, we study close-packed silicon dioxide (SiO2) nano-resonator arrays on top of silicon (Si) and gallium arsenide

Towards extending super-conducting nanowire single-photon detectors into the infrared wavelength range

September 16, 2018

Author(s)

Paulina S. Kuo, Brian G. Alberding

Nanoimaging of local photocurrent in hybrid perovskite solar cells via near-field scanning photocurrent microscopy

September 14, 2018

Author(s)

Dongheon Ha, Yohan Yoon, Ik Jae Park, Paul M. Haney, Nikolai B. Zhitenev

Photocurrent generation of methylammonium lead iodide (CH3NH3PbI3) hybrid perovskite solar cells is observed at the nanoscale using near-field scanning photocurrent microscopy (NSPM). We examine how the spatial map of photocurrent at individual grains or

Fully self-referenced frequency comb consuming 5 Watts of electrical power

September 12, 2018

Author(s)

Paritosh Manurkar, Edgar F. Perez, Daniel D. Hickstein, David R. Carlson, Jeffrey T. Chiles, Daron A. Westly, Esther Baumann, Scott A. Diddams, Nathan R. Newbury, Kartik A. Srinivasan, Scott B. Papp, Ian R. Coddington

We present a hybrid fiber/waveguide design for a 100-MHz frequency comb that is fully self- referenced and temperature controlled with less than 5 W of electrical power. Self-referencing is achieved by supercontinuum generation in a silicon nitride

Measurement of Radio-Frequency Radiation Pressure: The Quest for a NEW SI Traceable Power Measurement

August 27, 2018

Author(s)

Christopher L. Holloway, Alexandra B. Artusio-Glimpse, Ivan Ryger, John H. Lehman

In the quest for a new SI traceable power measurement, we performed measurements of the radiation pressure of a radio-frequency (RF) electromagnetic field. There are several groups around the world investigating methods to perform more direct SI traceable

Quadrature Histograms in Maximum Likelihood Quantum State Tomography

August 22, 2018

Author(s)

Leonardo E. Silva, Scott Glancy, Hilma H. Macedo De Vasconcelos

Quantum state tomography aims to determine the quantum state of a system from measured data and is an essential tool for quantum information science. When dealing with continuous variable quantum states of light, tomography is often done by measuring the

Optical Knife-Edge Displacement Measurement with Sub-Picometer Resolution for RF-MEMS

August 13, 2018

Author(s)

Vikrant J. Gokhale, Jason J. Gorman

Optical knife-edge measurements can be used to quantify in-plane displacements of microstructures vibrating at high frequencies. This work presents an analytical model and experimental results for optical knife-edge measurements that demonstrate precise

Numerical study of geometrical effects on the performance of an H-type cylindrical resonant photoacoustic cell

July 30, 2018

Author(s)

Mannoor Madhusoodanan, Jeeseong C. Hwang, Sangmo Kang

We have numerically studied the geometrical effects on the performance of an H-type cylindrical resonant photoacoustic cell, composed of one resonator and two symmetrical buffer cylinders, by performing simulations on the generation of acoustic waves in

Analysis of Fraunhofer Diffraction Patterns' Entropy Based on Apertures Shaped as National Borders

July 27, 2018

Author(s)

Albert F. Rigosi

Quantitative modeling of complex molecular response in coherent cavity-enhanced dual-comb spectroscopy

July 27, 2018

Author(s)

Adam J. Fleisher, David A. Long, Joseph T. Hodges

Photon thermalization via laser cooling of atoms

July 19, 2018

Author(s)

Chiao-Hsuan Wang, Michael Gullans, James V. Porto, William D. Phillips, Jacob Taylor

The cooling of atomic motion by scattered light enables a wide variety of technological and scientific explorations. Here we focus on laser cooling from the perspective of the light — specifi- cally, the scattering of light between different optical modes

Fidelity test for through-focus or volumetric type of optical imaging methods

July 12, 2018

Author(s)

Ravikiran Attota

Uniform Angular Illumination in Optical Microscopes

June 24, 2018

Author(s)

Ravikiran Attota, Emil Agocs

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