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You searched on: Topic Area: Optics

Displaying records 11 to 20 of 61 records.
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11. Experimental Bounds on Classical Random Field Theories
Topic: Optics
Published: 12/10/2014
Authors: Joffrey Kent Peters, Sergey V Polyakov, Jingyun Fan, Alan L Migdall
Abstract: Alternative theories to quantum mechanics motivate important fundamental tests of our understanding and description of the smallest physical systems. Here we place experimental limits on those classical field theories which result in power-depend ...

12. Flat lens criterion by small-angle phase
Topic: Optics
Published: 12/1/2014
Authors: Peter Ott, Mohammed H. Al Shakhs, Henri J Lezec, Kenneth John Chau
Abstract: It is sometimes possible to image using a flat lens consisting of planar, uniform media. There is conceptual division between theoretical flat lens proposals, which require exotic properties such as negative index or counter-intuitive behavior such ...

13. Nanoscale Imaging of Photocurrent and Efficiency in CdTe Solar Cells
Topic: Optics
Published: 10/15/2014
Authors: Leite Marina, maxim abashin, Henri J Lezec, anthony gianfrancesco, Talin Alec, Nikolai B Zhitenev
Abstract: The local collection characteristics of grain interiors and grain boundaries in thin film CdTe polycrystalline solar cells are investigated using scanning photocurrent microscopy. The carriers are locally generated by light injected through a small ...

14. Comb-calibrated laser ranging for threedimensional surface profiling with micrometerlevel precision at a distance
Topic: Optics
Published: 10/6/2014
Authors: Esther Baumann, Fabrizio Raphael Giorgetta, Jean-Daniel Deschenes, William C Swann, Ian R Coddington, Nathan Reynolds Newbury
Abstract: Non-contact surface mapping at a distance is interesting in diverse applications including industrial metrology, manufacturing, forensics, and artifact documentation and preservation. Frequency modulated continuous wave (FMCW) laser detection and ...

Topic: Optics
Published: 9/12/2014
Authors: Zeeshan Ahmed, Gregory F Strouse
Abstract: For the past century, industrial temperature measurements have relied on resistance measurement of a thin metal wire or filament whose resistance varies with temperature. Though resistance thermometers can routinely measure industrial temperatures wi ...

16. Absolute pulse energy measurements of soft x-rays at the Linac Coherent Light Source
Topic: Optics
Published: 8/25/2014
Authors: Uwe Arp, Alexander Sorokin, Ulf Jastrow, Pavle Jurani?, Svea Kreis, Mathias Richter, Yiping Feng, Dennis Nordlund, Kai Tiedtke, Philip Heimann, Bob Nagler, Hae Ja Lee, Stephanie Mack, Marco Cammarata, Oleg Krupin, Marc Messerschmidt, Michael Holmes , Michael Rowen, William Schlotter, Stefan Moeller, Joshua Turner
Abstract: This paper reports novel measurements of x-ray optical radiation on an absolute scale from a recently developed source of radiation generated in the soft x-ray regime of a free electron laser. We give a brief description of the physics behind the ...

17. Speckle phase noise in coherent laser ranging: fundamental precision limitations
Topic: Optics
Published: 8/8/2014
Authors: Esther Baumann, Jean-Daniel Deschenes, Fabrizio Raphael Giorgetta, William C Swann, Ian R Coddington, Nathan Reynolds Newbury
Abstract: Frequency-modulated continuous-wave laser detection and ranging (FMCW LADAR) measures the range to a surface through coherent detection of the backscattered light from a frequency-swept laser source. The ultimate limit to the range precision of ...

18. High-Speed Coherent Raman Fingerprint Imaging of Biological Tissues
Topic: Optics
Published: 7/20/2014
Authors: Charles H Camp, Young Jong Lee, John Michael Heddleston, Christopher Michael Hartshorn, Angela R Hight Walker, Jeremy N. Rich, Justin D. Lathia, Marcus T Cicerone
Abstract: We have developed a coherent Raman imaging platform using broadband coherent anti-Stokes Raman scattering (BCARS) that provides an unprecedented combination of speed, sensitivity, and spectral breadth. The system utilizes a unique configuration of la ...

19. Visible-frequency asymmetric transmission devices incorporating a hyperbolic metamaterial
Topic: Optics
Published: 6/17/2014
Authors: Ting Xu, Henri J Lezec

20. Ultra-Sensitive Chip-Based Photonic Temperature Sensor Using Ring Resonator Structures
Topic: Optics
Published: 2/3/2014
Authors: Haitan Xu, Mohammad Hafezi, Jingyun Fan, Jacob M Taylor, Gregory F Strouse, Zeeshan Ahmed
Abstract: Temperature is one of the most measured quantity in the world, second only to time. Recently there has been considerable interest in developing photonic temperature sensors to leverage advancements in frequency metrology. Here we show that Silico ...

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