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You searched on: Topic Area: Optics

Displaying records 41 to 50 of 69 records.
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41. Upper roughness limitations on the TIS/RMS relationship
Topic: Optics
Published: 9/27/2012
Authors: J C Stover, Sven Schroeder, Thomas Avery Germer
Abstract: The relationship between total integrated scatter (TIS) and root mean square (rms) roughness was developed in the radar literature and enabled the first use of scatter measurements to monitor optical roughness. This relationship has been used and mi ...

42. Probing coherence in microcavity frequency combs via optical pulse shaping
Topic: Optics
Published: 8/29/2012
Authors: Fahmida Ferdous, Houxun H. Miao, Pei-Hsun Wang, Daniel E. Leaird, Kartik A Srinivasan, Lei Chen, Vladimir A Aksyuk, Andrew M Weiner
Abstract: Recent investigations of microcavity frequency combs based on cascaded four-wave mixing have revealed a link between the evolution of the optical spectrum and the observed temporal coherence. Here we study a silicon nitride microresonator for which ...

43. A compact and robust method for full Stokes spectropolarimetry
Topic: Optics
Published: 8/1/2012
Authors: William Sparks, Thomas Avery Germer, John MacKenty, Frans Snik
Abstract: We present an approach to spectropolarimetry which requires neither moving parts nor time dependent modulation, and which o ers the prospect of achieving high sensitivity. The concept, which is one of those generically known as channeled polarimetry, ...

44. An algorithm for finding clusters with a known distribution and its application to photon-number resolution using a superconducting transition-edge sensor
Topic: Optics
Published: 7/20/2012
Authors: Zachary H Levine, Thomas Gerrits, Alan L Migdall, Daniel Victor Samarov, Brice R. Calkins, Adriana E Lita, Sae Woo Nam
Abstract: Improving photon-number resolution of single-photon sensitive detectors is important for many applications, as is extending the range of such detectors. Here we seek improved resolution for a particular Superconducting Transition-Edge Sensor (TES) t ...

45. Phase sensitive parametric optical metrology: Exploring the limits of 3-dimensional optical metrology
Topic: Optics
Published: 4/4/2012
Authors: Richard M Silver, Jing Qin, Bryan M Barnes, Hui Zhou, Ronald G Dixson, Francois R. Goasmat
Abstract: There has been much recent work in developing advanced optical metrology applications that use imaging optics for critical dimension measurements, defect detection and for potential use with in-die metrology applications. Sensitivity to nanometer sca ...

46. Differential matrices for depolarizing media
Topic: Optics
Published: 3/1/2012
Author: Thomas Avery Germer
Abstract: The evolution of a Stokes vector through depolarizing media is considered. A general form for the differential matrix is derived that is appropriate in the presence of depolarization, and is parameterized in a manner that ensures that it yields, upon ...

47. Feedback Control of Optically Trapped Particles
Topic: Optics
Published: 12/17/2011
Authors: Jason John Gorman, Arvind Kumar Balijepalli, Thomas W LeBrun
Abstract: Optical trapping is a method for manipulating micro- and nanoscale particles that is widely used in biophysics and colloid science, among other areas. This method uses optical forces to confine the position of a particle to a localized region, which ...

48. Efficient quantum dot single photon extraction into an optical fiber using a nanophotonic directional coupler
Topic: Optics
Published: 9/19/2011
Authors: Marcelo Ishihara Davanco, Matthew T. Rakher, W. Wegscheider, Dieter Schuh, Antonio Badolato, Kartik A Srinivasan
Abstract: We demonstrate a spectrally broadband and efficient technique for collecting photoluminescence from a single InAs quantum dot directly into a standard single mode optical fiber. In this approach, an optical fiber taper waveguide is placed in contact ...

49. A circular dielectric grating for vertical extraction of single quantum dot emission
Topic: Optics
Published: 7/25/2011
Authors: Marcelo Ishihara Davanco, Matthew T. Rakher, Dieter Schuh, Antonio Badolato, Kartik A Srinivasan
Abstract: We demonstrate a suspended circular grating composed of partially etched annular trenches in a thin GaAs membrane, designed for e±cient and moderately broadband ( approx. 5 nm) extraction of emission from single InAs quantum dots. Simulations indic ...

50. Effects of Roughness on Scatterometry Signatures
Topic: Optics
Published: 5/26/2011
Authors: Martin Foldyna, Thomas Avery Germer, Brent Bergner
Abstract: We used azimuthally-resolved spectroscopic Mueller matrix ellipsometry to study a periodic silicon line structure with and without artificially-generated line edge roughness (LER). Grating profiles were determined from multiple azimuthal configuratio ...

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