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Topic Area: Optoelectronics

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1. Low-frequency noise in gallium nitride nanowire mechanical resonators
Topic: Optoelectronics
Published: 12/7/2012
Authors: Jason Gray, Kristine A Bertness, Norman A Sanford, Charles T. Rogers
Abstract: We report on the low-frequency 1/f (flicker) parameter noise displayed by the resonance frequency and resistance of doubly clamped c-axis gallium nitride nanowire (NW) mechanical resonators. The resonators are electrostatically driven and their mech ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909950

2. Determination of graphene work function and graphene-insulator-semiconductor band alignment by internal photoemission spectroscopy
Topic: Optoelectronics
Published: 7/11/2012
Authors: Rusen Yan, Qin Zhang, Wei Li, Irene G. Calizo, Tian T. Shen, Curt A Richter, Angela R Hight Walker, Xuelei X. Liang, David J Gundlach, Nhan V Nguyen, Huili Grace Xing, Alan Seabaugh
Abstract: We determined the band alignment of a graphene-oxide-silicon structure using internal photoemission spectroscopy. From the flatband voltage and Dirac voltage we infer a 4.3  10e11 cm-2 negative extrinsic charge present on the graphene surface. Als ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911396

3. Comb-assisted swept laser spectroscopy with a mode-hop free tunable external cavity QCL
Topic: Optoelectronics
Published: 5/1/2012
Authors: Kevin Otis Knabe, Fabrizio Raphael Giorgetta, Nathan Reynolds Newbury, Chris Armacost, Michael Radunsky, Sam Crivello, Timothy Day, Paul A Williams
Abstract: We demonstrate sub-MHz spectral resolution of N^d2^O absorption spectra acquired with a swept external-cavity quantum cascade laser (QCL) over 0.87 THz. The QCL frequency is monitored by sum -frequency generation with an optical fiber frequency comb.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910257

4. Optical fiber-coupled cryogenic radiometer with carbon nanotube absorber
Topic: Optoelectronics
Published: 4/1/2012
Authors: David J Livigni, Nathan Andrew Tomlin, Christopher L Cromer, John H Lehman
Abstract: A cryogenic radiometer was constructed for direct-substitution optical fiber power measurements. The cavity is intended to operate at the 3 K temperature stage of a dilution refrigerator or 4.2 K stage of a liquid cryostat. The optical fiber is remov ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909507

5. Frequency Characterization of an External-Cavity Quantum Cascade Laser at 4.5 {mu}m using a Frequency Comb
Topic: Optoelectronics
Published: 1/25/2012
Authors: Kevin Otis Knabe, Paul A Williams, Fabrizio Raphael Giorgetta, Chris Armacost, Michael Radunsky, Nathan Reynolds Newbury
Abstract: We measure the frequency noise spectrum of a free-running external-cavity quantum cascade laser at 4.5 {mu}m through sum frequency generation with a fiber frequency comb.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909814

6. High-Accuracy Photoreceiver Frequency Response Measurements at 1.55 um by Use of a Heterodyne Phase-Locked Loop
Topic: Optoelectronics
Published: 9/29/2011
Authors: Tasshi Dennis, Paul D Hale
Abstract: We demonstrate a high-accuracy heterodyne measurement system for characterizing the magnitude of the frequency response of high-speed 1.55 µm photoreceivers from 2 MHz to greater than 50 GHz. At measurement frequencies below 2 GHz, we employ a phase- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908885

7. Enhanced coupling between light and surface plasmons by nanostructured Fabry-Pérot resonator
Topic: Optoelectronics
Published: 9/26/2011
Authors: Brian S. Dennis, Vladimir A Aksyuk, Michael Haftel, Stefan T. Koev, Girsh Blumberg
Abstract: It is recognized that surface plasmons (SPs),which can be present on particulate, smooth, or corrugated metallic surfaces, have enormous potential in the fields of novel nano-optical and opto-electronic devices, as well as in spectroscopic, biologic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907837

8. Catalyst-free GaN nanowire growth and optoelectronic characterization
Topic: Optoelectronics
Published: 8/19/2011
Authors: Kristine A Bertness, Norman A Sanford, John B Schlager
Abstract: We discuss the present state-of-the-art concerning the growth mechanism, optical luminescence and electrical properties for GaN nanowires grown with catalyst-free molecular beam epitaxy. These nanowires are essentially defect-free and display long p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906115

9. Gallium nitride nanowire electromechanical resonators with piezoresistive readout
Topic: Optoelectronics
Published: 8/11/2011
Authors: Kristine A Bertness, Jason M. Gray, Norman A Sanford, Charles T. Rogers
Abstract: We report on the fabrication, piezoresistive readout, and frequency response of doubly-clamped c-axis gallium nitride (GaN) nanowire (NW) resonators that show mechanical quality factors exceeding 10,000. The devices are fabricated using a combination ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907884

10. Comparison of absolute measurements of laser power using next generation NIST high power radiometer and Air Force high power calorimeter
Topic: Optoelectronics
Published: 6/8/2011
Authors: Marla L Dowell, Christopher L Cromer, Xiaoyu X. Li, John Bagford, Dan Seibert, John Eric, David Cooper, Steven Comisford, Ernie Cromwell, Richard Bowling
Abstract: We report comparisons of laser power measurements between the new NIST radiometer, also known as the BB Prime, and the current Air Force standards, known as the BB calorimeter. [1] These measurements were performed using high power laser sources in t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908402