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Topic Area: Optics

Displaying records 41 to 50 of 71 records.
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41. 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

42. 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

43. 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

44. 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

45. 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

46. 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

47. 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

48. 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

49. 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

50. 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



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