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Topic Area: Optics
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Displaying records 31 to 40 of 56 records.
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31. 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

32. 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

33. 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

34. 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

35. Iron Optical Constants and Reflectance Spectroscopy of Planetary Surfacers
Topic: Optics
Published: 3/1/2010
Authors: David Blewett, Nhan V Nguyen, Oleg A Kirillov, Samuel Lawrence
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907161

36. Molecular spectroscopy with frequency combs
Topic: Optics
Published: 3/1/2010
Author: Ian R Coddington
Abstract: Pulsed femtosecond frequency combs are rapidly developing as a powerful spectroscopic tool. As a spectroscopic source stabilized frequency combs potentially offer broad spectral coverage, near perfect frequency accuracy, low timing jitter and broadb ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904602

37. Single-Photon Propagation Time through Dielectric Bandgaps: Large Variation Due to Small Structural Changes
Topic: Optics
Published: 2/1/2010
Authors: Natalia Borjemscaia Rutter, Sergey V Polyakov, Paul D Lett, Alan L Migdall
Abstract: The transit times of photons traveling through opaque barriers such as dielectric stacks exhibit the Hartman saturation effect. This saturation of the transit time is quite sensitive to the addition of a single dielectric layers, even onto an alread ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901549

38. Infrared time domain spectroscopy with synchronized frequency combs
Topic: Optics
Published: 1/29/2010
Authors: Nathan Reynolds Newbury, Ian R Coddington, William C Swann
Abstract: We describe a frequency-comb based system for time-domain spectroscopy in the near infrared. Our configuration implements synchronous, repetitive sampling of the time domain signature for real-time coherent signal averaging and improved signal-to-noi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903832

39. Polarized Optical Scattering Signatures from Biological Materials
Topic: Optics
Published: 1/11/2010
Authors: W. E. Martin, E. Hesse, J. H. Hough, William Sparks, C. S. Cockell, Z. Ulanowski, Thomas Avery Germer, B. Kaye
Abstract: The polarization of laser light backscattered from biological samples has been measured over the wavelength range 350 to 850nm. Incident circular, linearly polarized, and unpolarized light produces significant spectrally prominent scattered polari ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906031

40. Progress Toward Corrugated Feed Horn Arrays in Silicon
Topic: Optics
Published: 12/16/2009
Authors: Joseph Wright Britton, Ki W. Yoon, James A Beall, Daniel Thomas Becker, Hsiao-Mei Cho, Gene C Hilton, Michael David Niemack, Kent D Irwin
Abstract: We are developing monolithic arrays of corrugated feed horns fabricated in silicon for dual-polarization single mode operation at 90, 145 and 220 GHz. The arrays consist of hundreds of platelet feed horns assembled from gold coated stacks of micromac ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903191