A5067670365- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Adhesion, Friction, and Surface Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Mechanics and Biomechanics Studies
- Advanced Fiber Laser Technologies
- Advanced Semiconductor Detectors and Materials
- Geophysics and Gravity Measurements
- Surface and Thin Film Phenomena
- Thermography and Photoacoustic Techniques
- Quantum, superfluid, helium dynamics
- Laser-Matter Interactions and Applications
- Advanced Surface Polishing Techniques
- Surface Roughness and Optical Measurements
- Advanced Welding Techniques Analysis
- Electronic and Structural Properties of Oxides
- Force Microscopy Techniques and Applications
- Additive Manufacturing Materials and Processes
- Welding Techniques and Residual Stresses
- Mechanical and Optical Resonators
- Gyrotron and Vacuum Electronics Research
- Relativity and Gravitational Theory
- Brain Metastases and Treatment
- Solid State Laser Technologies
- Quantum Mechanics and Applications
Cabrillo College
2024
Rolls-Royce (United Kingdom)
2023
Vector Oncology (United States)
2021-2022
National Institute of Standards and Technology
2004-2008
University of Colorado Boulder
2004-2008
Accuray (United States)
2005
University of Colorado System
2005
Massachusetts Institute of Technology
2003
Inflammatory Response Research (United States)
1986-1992
General Electric (United States)
1959
The quantitative effects of dislocations on the electrical and optical properties long-wavelength infrared (LWIR) HgCdTe photovoltaic detectors was determined by deliberately introducing into localized regions two high-performance arrays having cutoff wavelengths 9.5 10.3 μm at T=78 K. Results show that can have a dramatic effect detector R0A product, particularly temperatures below 78 For large dislocation densities, decreases as square density; onset dependence occurs progressively lower...
Traveling wave type parametric amplifiers have been proposed which utilize transmission lines having reactance varied by a propagating wave. An analysis indicates that in systems with little or no dispersion, pumping will not result exponential gain of an applied signal but conversion energy to multiplicity cross-product frequencies. Two physical models such wide-band are discussed and the special case zero-dispersion line is analyzed. The results indicate although total increases...
Results from the JILA optical lattice clock are presented. We report on our development of precision tools for clock, including a stabilized laser with sub-Hz linewidth, fs-comb based technology allowing accurate comparison in both microwave and domains, transfer over fiber an urban environment. High resolution spectroscopy (Q > 2 times 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">14</sup> ) confined strontium atoms is used...
It is important to be able nondestructively characterize (‘‘screen’’) the electrical properties of those areas HgCdTe epitaxial material that will later made into devices. This paper compares several noncontact techniques for measuring resistivity, carrier concentration, and mobility with standard Hall-effect technique. The examined are far-infrared reflection, Raman scattering, eddy–current absorption, electroreflectance. Of these techniques, reflection was found best technique mobility....
The weakness of the force gravity compared to electromagnetic and other fundamental forces has been referred as hierarchy problem. If propagates in several additional spatial dimensions that are large Planck scale, hypothesis is stronger close-up, e.g., below a certain interaction distance magnified. In hard disk drive assembly, magneto-resistor (MR) read sensor head assembly operates within 100nm spinning surface. Fourteen variable size nano-bumps nano-pits were fabricated on magnetic...
The weakness of the force gravity compared to electromagnetic and other fundamental forces has been referred as hierarchy problem. If propagates in several additional spatial dimensions that are large Planck scale, hypothesis is stronger close-up, e.g., below a certain interaction distance magnified. In hard disk drive assembly, magneto-resistor (MR) read sensor head assembly operates within 100nm spinning surface. Fourteen variable size nano-bumps nano-pits were fabricated on magnetic...
Vector Atomic has developed optical clocks using iodine vapor cells. These provide excellent short-term instability, require neither laser cooling nor cavity pre-stabilization, are insensitive to motion, and maintain holdovers of <1ns for several days.
In a disk drive magnetic read/write is achieved with head flying closely over disk. As area 1 recording density increased to several Gbits/In<SUP>2</SUP>, the dynamic height of reduced one (mu) -inch or less. Bumps taller than often results in crash. Since DLC coating on surface less 10 nanometers thickness, pits depth cause damage layer. To prevent crash missing bit errors, needs be examined for bumps and deeper thickness. this paper, we report experimental using an MR sensor precision...
Stereotactic radiosurgery (SRS) combines the principles of sterotaxy, or 3_D target localization, with multiple cross-fired beams from a high-energy radiation source to precisely irradiate an abnormal (oftentimes cancerous) lesion within patient's body. This technique allows maximally aggressive dosing target, while normal surrounding tissue receives lower, non-injurious doses radiation. The ideal objective is destruction targeted area without damaging any tissue. differs conventional...
<p>The weakness of the force gravity compared to electromagnetic and other fundamental forces has been referred as hierarchy problem. If propagates in several additional spatial dimensions that are large Planck scale, hypothesis is stronger close-up, e.g., below a certain interaction distance magnified. In hard disk drive assembly, magneto-resistor (MR) read sensor head assembly operates within 100nm spinning surface. Fourteen variable size nano-bumps nano-pits were fabricated on...
<p>The weakness of the force gravity compared to electromagnetic and other fundamental forces has been referred as hierarchy problem. If propagates in several additional spatial dimensions that are large Planck scale, hypothesis is stronger close-up, e.g., below a certain interaction distance magnified. In hard disk drive assembly, magneto-resistor (MR) read sensor head assembly operates within 100nm spinning surface. Fourteen variable size nano-bumps nano-pits were fabricated on...
<p>The weakness of the force gravity compared to electromagnetic and other fundamental forces has been referred as hierarchy problem. If propagates in several additional spatial dimensions that are large Planck scale, hypothesis is stronger close-up, e.g., below a certain interaction distance magnified. In hard disk drive assembly, magneto-resistor (MR) read sensor head assembly operates within 100nm spinning surface. Fourteen variable size nano-bumps nano-pits were fabricated on...
<p>The weakness of the force gravity compared to electromagnetic and other fundamental forces has been referred as hierarchy problem. If propagates in several additional spatial dimensions that are large Planck scale, hypothesis is stronger close-up, e.g., below a certain interaction distance magnified. In hard disk drive assembly, magneto-resistor (MR) read sensor head assembly operates within 100nm spinning surface. Fourteen variable size nano-bumps nano-pits were fabricated on...
Recent results from the JILA <sup>87</sup>Sr optical lattice clock are presented. Using tight confinement of an in combination wit a sub-Hz linewidth diode laser we have achieved pulse-length limited 1.8 Hz for <sup>1</sup>S<sub>0</sub>- <sup>3</sup>P<sub>0</sub> transition. This corresponds to quality factor Q ≈ 2.4 x 10<sup>14</sup>, and is record coherent spectroscopy. With addition small magnetic bias field, high line transition has also allowed us resolve nuclear-spin sublevels,...
Summary form only given. We report on experiments with a new apparatus for BEC of rubidium, including the transport and manipulation condensates in science chamber using optical tweezers, study superradiant scattering short-pulse regime.
We explore photonic-integrated circuits and metasurface optics to generate multiple, large diameter, circularly polarized laser beams for a compact strontium optical clock. demonstrate an 88 Sr magneto-optical trap with integrated photonics in liter-scale apparatus.
We demonstrate visible integrated photonics, using an inverse-design approach. Tantalum-pentoxide nanophotonics offers <2 dB/cm waveguide loss across 450-2000 nm range. create a suite of passives, including arbitrary-polarization grating sources for Sr optical clock.