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Topic Area: Optics
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Displaying records 41 to 50 of 79 records.
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41. Mueller matrix ellipsometry of artificial non-periodic line edge roughness in presence of finite numerical aperture
Topic: Optics
Published: 4/20/2011
Authors: Thomas Avery Germer, Martin Foldyna, 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). The unperturbed, reference grating profile was determined from multip ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908372

42. Characterizing arbitrary CW waveforms with 1500 THz/s chirp rates
Topic: Optics
Published: 4/5/2011
Authors: Ian R Coddington, Fabrizio Raphael Giorgetta, Esther Baumann, William C Swann, Nathan Reynolds Newbury
Abstract: A Dual frequency comb interferometer was constructed to monitor cw laser chirp rates exceeding 1500 THz/s with MHz level resolution and accuracy over a 3 THz spectral sweep. Monitoring of the chirped laser is continuous. Additionally, absolute frequ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907300

43. Introduction to special issue on single-photon technologies
Topic: Optics
Published: 3/10/2011
Authors: Alan L Migdall, Sergey V Polyakov, Jingyun Fan, Ivo Pietro Degiovanni, Jessica Cheung
Abstract: This special issue accompanies the 4th international conference on single-photon technologies held at the National Institute of Standards and Technology (NIST) Boulder in November 2009. This community has met every two years at national metrology ins ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907536

44. Rapid, high resolution frequency comb measurements
Topic: Optics
Published: 2/13/2011
Authors: Ian R Coddington, Fabrizio Raphael Giorgetta, Esther Baumann, William C Swann, Nathan Reynolds Newbury
Abstract: Frequency combs serve as an extremely high accuracy reference across broad portions of the optical spectrum. Dual frequency combs harness this accuracy and allow for fast and highly flexible measurements of passive and active sources.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907399

45. Defining Common Reference Channels for Geostationary Infrared Imagers
Topic: Optics
Published: 12/31/2010
Authors: Tim Hewison, Ruediger Kessel
Abstract: This article follows up the theoretical considerations presented above with an example applied to the infrared channels of geostationary imagers. The uncertainties, u(deltaLr), introduced by the process of spectral conversion to Common Reference Chan ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907785

46. Common Reference Channels for Metrological Comparability
Topic: Optics
Published: 12/20/2010
Authors: Ruediger Kessel, Tim Hewison
Abstract: In this article we discuss the effect of the choice of reference during calibration on later use of the calibrated results, and how a reference should be chosen to support later use of the data. Starting from the concept of metrological comparability ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907541

47. Generalized ellipsometry of artificially designed line width roughness
Topic: Optics
Published: 12/10/2010
Authors: Martin Foldyna, Thomas Avery Germer, Brent Bergner, Ronald G Dixson
Abstract: We use azimuthally-resolved spectroscopic Mueller matrix ellipsometry to study a periodic silicon line structure with and without artificially-generated line width roughness (LWR). We model the artificially perturbed grating using 1D and 2D rigorous ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906239

48. Sensitivity scaling of dual frequency comb spectroscopy
Topic: Optics
Published: 6/15/2010
Authors: Ian R Coddington, William C Swann, Nathan Reynolds Newbury
Abstract: Coherent dual comb spectroscopy can harness many inherent strengths of frequency combs to provide high-resolution, high-accuracy measurements of a sample response (in both magnitude and phase) on a single detector. We will discuss the noise scaling p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905098

49. Tunable laser spectroscopy referenced with dual frequency combs
Topic: Optics
Published: 6/15/2010
Authors: Fabrizio Raphael Giorgetta, Ian R Coddington, Esther Baumann, William C Swann, Nathan Reynolds Newbury
Abstract: Frequency combs provide broadband spectroscopic measurements with high frequency accuracy and precision. However, because the comb power is distributed over a broad spectrum, the sensitivity can be low unless some form of multiplexed detection or ca ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905099

50. Hybrid gap modes induced by fiber taper waveguides: application in spectroscopy of single solid-state emitters deposited on thin films.
Topic: Optics
Published: 5/24/2010
Authors: Marcelo Ishihara Davanco, Kartik A Srinivasan
Abstract: We show, via simulations, that an optical fiber taper waveguide may be an efficient spectroscopy tool for single emitters, such as single molecules or colloidal quantum dots, deposited on the surface of a thin dielectric membrane. The fiber-membra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904726



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