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Topic Area: Optical Properties of Materials

Displaying records 1 to 10 of 16 records.
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1. The NIST Robotic Optical Scatter Instrument (ROSI) and its Application to BRDF Measurements of Diffuse Reflectance Standards for Remote Sensing
Topic: Optical Properties of Materials
Published: 9/23/2013
Authors: Heather J Patrick, Clarence Joseph Zarobila, Thomas Avery Germer
Abstract: We describe the robotic optical scatter instrument (ROSI), a new robotic arm-based goniometer for in-plane and out-of-plane reflectance and bidirectional reflectance distribution function (BRDF) measurements of surfaces. The goniometer enables BRDF ...

2. Phase-shifting algorithms for the interferometric measurement of form error, diameter variation and refractive index inhomogeneity of fused silica spheres
Topic: Optical Properties of Materials
Published: 9/9/2012
Authors: Chu-Shik Kang, Ulf Griesmann, Johannes A Soons
Abstract: High-precision spheres have many applications in precision engineering and metrology, such as the calibration of transmission spheres for interferometry, density standards for mass metrology, and spherical gyroscope rotors. For these applications it ...

3. A Glowing Future for Lab on a Chip Testing Standards
Topic: Optical Properties of Materials
Published: 6/28/2012
Author: Samuel M Stavis
Abstract: Testing standards are more fundamental from a metrological perspective and less controversial from an industrial perspective than product standards, representing a path of less resistance towards the standardization and commercialization of lab on a ...

4. Investigation of SiO2/HfO2 stacks for flash memory applications
Topic: Optical Properties of Materials
Published: 4/28/2011
Authors: Nhan V Nguyen, Bashwar Chakrabarti

5. Optical and electrical properties of percolated graphene networks from liquid exfoliation of graphite
Topic: Optical Properties of Materials
Published: 10/22/2010
Authors: Jan Obrzut, Denis Pristinski, Mitra Yoonessi
Abstract: Thin films obtained from liquid phase exfoliation of graphite exhibit the conductivity and transparency properties of percolated networks having interconnectivity distance of about 1 um to 1.5 um. The mean radius of the platelets in solution determin ...

6. Separation and Metrology of Nanoparticles by Nanofluidic Size Exclusion
Topic: Optical Properties of Materials
Published: 8/11/2010
Authors: Samuel M Stavis, Jon C Geist, Michael Gaitan
Abstract: A nanofluidic approach to the separation and metrology of nanoparticles is demonstrated. Advantages of this approach include nanometer-scale resolution, nanometer-scale to submicrometer-scale range, mitigation of hydrodynamic and diffusional limitat ...

7. Linewidth narrowing and Purcell enhancement in photonic crystal cavities on an Er-doped silicon nitride platform
Topic: Optical Properties of Materials
Published: 1/25/2010
Authors: Yiyang Gong, Maria Makarova, Selcuk Yerci, Rui Li, Martin J Stevens, Burm Baek, Sae Woo Nam, Robert Hadfield, Sander N. Dorenbos, Val Zwiller, Luca Dal Negro, Jelena Vuckovic
Abstract: Light emission at 1.54 mm from an Er-doped amorphous silicon nitride layer coupled to photonic crystal resonators at cryogenic and room temperatures and under varying optical pump powers has been studied. The results demonstrate that small mode volu ...

8. Relative Photon-to-Carrier Efficiencies of Alternating Nanolayers of Zinc Phthalocyanine and C60 Multilayer Films Assessed by Time-Resolved Terahertz Spectroscopy
Topic: Optical Properties of Materials
Published: 10/1/2009
Authors: Okan Esenturk, Joseph S Melinger, Paul A. Lane, Edwin J Heilweil
Abstract: Alternating multi-layer and 1:1 blended films of zinc phthalocyanine (ZnPc)and buckminsterfullerene (C60) were investigated as model active layers for solar cells by Time-Resolved Terahertz Spectroscopy (TRTS). Relative photon-to-carrier efficiencies ...

9. Absolute Cryogenic Radiometer and Solid State Trap Detectors for IR Power Scales Down to 1 pW with 0.1% Uncertainty
Topic: Optical Properties of Materials
Published: 6/2/2009
Authors: Adriaan Carl Linus Carter, Solomon I Woods, Stephen Carr, Timothy Michael Jung, Raju Vsnu Datla
Abstract: Commercially available Absolute Cryogenic Radiometers (ACRs) have combined uncertainties that grow rapidly above 1% at power levels below 10 nW. There are solid state detectors, however, used in sensors and radiometers that cannot be calibrated at l ...

10. Time and Frequency-Domain Spectroscopy with Dual Frequency Combs
Topic: Optical Properties of Materials
Published: 5/28/2009
Authors: Nathan Reynolds Newbury, Ian R Coddington, William C Swann
Abstract: High-resolution spectroscopic measurements of the amplitude and phase spectra from a gas sample can be acquired by use of dual frequency combs. Here we discuss the corresponding gas signature in the time domain.

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