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Topic Area: Optics
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Displaying records 41 to 50 of 73 records.
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41. 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

42. 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

43. 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

44. 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

45. 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

46. 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

47. Effective medium approximations for modeling optical reflectance from gratings with rough edges
Topic: Optics
Published: 5/1/2010
Authors: Brent C. Bergner, Thomas Avery Germer, Thomas Suleski
Abstract: Line edge roughness (LER) has been identified as a potential source of uncertainty in optical scatterometry measurements. Characterizing the effect of LER on optical scatterometry signals is required to assess measurement uncertainty. However, rigor ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903990

48. Fast and accurate comb-based spectral analysis of a frequency agile CW laser
Topic: Optics
Published: 5/1/2010
Authors: Fabrizio Raphael Giorgetta, Ian R Coddington, Esther Baumann, William C Swann, Nathan Reynolds Newbury
Abstract: The time-resolved frequency spectrum of a frequency agile CW laser is measured with a 300{mu}s update rate and 3 kHz resolution/accuracy over a 28 nm wavelength range with a coherent dual comb setup.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905394

49. Visible and near-infrared reflectance spectrometry of Fe for lunar surface composition study
Topic: Optics
Published: 3/31/2010
Authors: David Blewett, Nhan V Nguyen, Oleg A Kirillov, Samuel Lawrence
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907162

50. Effect of Bandwidth and Numerical Aperture in Optical Scatterometry
Topic: Optics
Published: 3/1/2010
Authors: Thomas Avery Germer, Heather J Patrick
Abstract: We consider the effects of finite spectral bandwidth and numerical aperture in scatterometry measurements and discuss efficient integration methods based upon Gaussian quadrature in one dimension (for spectral bandwidth averaging) and two dimensions ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905013



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