Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Evan J. Katz"'
Publikováno v:
Free-Space Laser Communications XXXII.
This report presents our model for atmospheric turbulence fade for an Earth/Space system, and our physical emulation test bed components. For modeling the atmosphere, we have used the Hufnagel-Valley model, in combination with Cn2 measurement paramet
Autor:
Evan J. Katz, Tony D. Roberts, Andrew Hohne, John D. Lekki, Brian E. Vyhnalek, Jonathan Dietz, Benjamin Child, Ian R. Nemitz, Bertram Floyd
Publikováno v:
Free-Space Laser Communications XXXI.
Time-energy entangled photon pairs are created by a system consisting of a 1064 nm pump diode laser that is fiber coupled to a high generation rate photon pair source. The source is a dual element periodically poled Magnesium Oxide doped Lithium Niob
Publikováno v:
Free-Space Laser Communications XXXI.
The NASA Glenn Research Center's development of a high-photon efficiency real-time optical communications ground receiver has added superconducting nanowire single-photon detectors (SNSPDs) coupled with few-mode fibers (FMF). High data rate space-to-
Autor:
Pushkar Pandit, John J. Pouch, Nathaniel C. Wilson, Tony D. Roberts, Ian R. Nemitz, Skyler Baugher, Sarah A. Tedder, Bertram Floyd, John D. Lekki, Evan J. Katz, Roger Tokars, Brian E. Vyhnalek
Publikováno v:
Broadband Access Communication Technologies XII.
Entangled photon pairs are created by a system consisting of a 1064 nm pump diode laser that is fiber coupled to a high generation rate photon pair source. The source is a dual element periodically poled potassium titanyl phosphate (KTP) waveguide th
Publikováno v:
Radiation Effects and Defects in Solids. 168:924-932
Semi-insulating Gallium nitride was irradiated by fast and thermal neutrons with fluences from 1014 to 1016 n/cm2. Depth-resolved cathodoluminescence spectroscopy was used to determine defects changes before and after irradiation. The results reveale
Autor:
Nemitz, Ian R., Dietz, Jonathan, Evan, J. Katz, Vyhnalek, Brian, Child, Benjamin, Floyd, Bertram M., Lekki, John D.
Publikováno v:
Proceedings of SPIE; 11/26/2018, Vol. 10902, p1-7, 7p
Autor:
Gerald Lucovsky, Evan J. Katz, Harold L. Hughes, Leonard J. Brillson, Z. Zhang, Kwun-Bum Chung
Publikováno v:
2009 International Semiconductor Device Research Symposium.
We have combined nanoscale depth-resolved cathodoluminescence spectroscopy (DRCLS) and spectroscopic ellipsometry (SE) to measure the energies and depth distribution of charge traps in SiO 2 /SiO x /SiO 2 gate dielectrics for radiation-tolerant elect
Autor:
Z. Zhang, Umesh K. Mishra, Chung-Han Lin, Jie Qiu, Lei Cao, Evan J. Katz, Leonard J. Brillson
Publikováno v:
Journal of Applied Physics. 115:123705
We have measured the effect of fast and thermal neutrons on GaN Schottky barriers and ohmic contacts using current–voltage and transmission line method electrical techniques, optical, atomic force and scanning electron microscopy morphological tech
Autor:
Lei Cao, Chung-Han Lin, Z. Zhang, Jie Qiu, Umesh K. Mishra, Evan J. Katz, Leonard J. Brillson
Publikováno v:
Applied Physics Letters. 103:162106
Depth-resolved cathodoluminescence spectroscopy (DRCLS), time-resolved surface photovoltage spectroscopy, X-ray photoemission spectroscopy (XPS), and current-voltage measurements together show that fast versus thermal neutrons differ strongly in thei
Autor:
Harold L. Hughes, Gerald Lucovsky, Kwun-Bum Chung, Z. Zhang, Evan J. Katz, Leonard J. Brillson
Publikováno v:
Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena. 29:011027
We have used nanoscale depth-resolved cathodoluminescence spectroscopy (DRCLS) of device-tolerant oxides to measure the energy levels and spatial distribution of defects within nanocrystalline grains in an α-SiO2 matrix that counteract hole trapping