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You searched on: Topic Area: Optics

Displaying records 11 to 20 of 58 records.
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11. 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 ...

12. 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 ...

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 ...

14. 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 ...

15. 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 ...

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

17. 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 ...

18. Si3N4 optomechanical crystals in the resolved-sideband regime
Topic: Optics
Published: 1/27/2014
Authors: Marcelo Ishihara Davanco, Serkan Ates, Yuxiang Liu, Kartik A Srinivasan
Abstract: We demonstrate sideband-resolved Si3N4 optomechanical crystals supporting 105 quality factor optical modes at 980 nm, coupled to approximately 4 GHz frequency mechanical modes with quality factors of approximately 3000. Optomechanical electromagneti ...

19. First Report on Quantum Dot Coated CMOS CID Arrays for the UV and VUV
Topic: Optics
Published: 12/13/2013
Authors: Uwe Arp, Robert Edward Vest, Zoran Ninkov, Ross Robinson, Suraj Bhaskaran
Abstract: A technique has been developed for coating commercial off the shelf (COTS) detector arrays with a thin, uniform layer of quantum dots. The quantum deposition is accomplished using an Optomec Aerosol Jet rapid prototyping system. When illuminated by U ...

20. Hybrid Detectors
Topic: Optics
Published: 11/29/2013
Authors: Sergey V Polyakov, Alan L Migdall, Franco N.C. Wong, Ivo P Degiovanni, Ian Walmsley, Hendrik B Coldenstrodt-Ronge
Abstract: We present an overview of e orts to improve photon-counting detection systems through the use of hybrid detection techniques such as spatial- and time-multiplexing of conventional detectors, and frequency up-conversion. We review the basic operatio ...

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