Search Results - "Lehman, John H"

Evaluating the characteristics of multiwall carbon nanotubes by Lehman, John H., Terrones, Mauricio, Mansfield, Elisabeth, Hurst, Katherine E., Meunier, Vincent

“…During the past 20 years, multiwall carbon nanotubes (MWCNTs) have become an important industrial material. Hundreds of tons are produced each year. This…”
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Miniature force sensor for absolute laser power measurements via radiation pressure at hundreds of watts by Artusio-Glimpse, Alexandra B, Ryger, Ivan, Azarova, Natalia A, Williams, Paul A, Hadler, Joshua A, Lehman, John H

“…We present a small power meter that detects the radiation pressure of an incident high-power laser. Given its small package and non-destructive interaction…”
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Reduction of short wavelength reflectance of multi-wall carbon nanotubes through ultraviolet laser irradiation by Stephens, Michelle S., Simonds, Brian J., Yung, Christopher S., Conklin, Davis, Livigni, David J., Oliva, Alberto Remesal, Lehman, John H.

“…Multi-wall carbon nanotube coatings are used as broadband, low-reflectance absorbers for bolometric applications and for stray light control. They are also…”
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Extreme laser pulse-energy measurements by means of photon momentum by Williams, Paul A, Rogers, Kyle A, Divoky, Martin, Porrovecchio, Geiland, Tesař, Jiří, Smid, Marek, Lehman, John H

“…Extreme lasers capable of short, high-energy pulses are probing the frontiers of science and advancing practical technology. The utility of such lasers…”
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Plasma modification of vertically aligned carbon nanotubes: Superhydrophobic surfaces with ultra-low reflectance by Yung, Christopher S., Tomlin, Nathan A., Heuerman, Karl, Keller, Mark W., White, Malcolm G., Stephens, Michelle, Lehman, John H.

“…Vertically aligned carbon nanotubes (VACNTs) are excellent broadband (UV–VIS–IR) absorbers of light that can be made even darker with plasma treatments…”
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High-accuracy room temperature planar absolute radiometer based on vertically aligned carbon nanotubes by Vaskuri, Anna K., Stephens, Michelle S., Tomlin, Nathan A., Spidell, Matthew T., Yung, Christopher S., Walowitz, Andrew J., Straatsma, Cameron, Harber, David, Lehman, John H.

“…We have developed a planar absolute radiometer for room temperature (PARRoT) that will replace the legacy C-series calorimeter as the free-space…”
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Radiation-Pressure-Enabled Traceable Laser Sources at CW Powers up to 50 kW by Williams, Paul A., Artusio-Glimpse, Alexandra B., Hadler, Joshua A., King, Daniel W., Rogers, Kyle A., Ryger, Ivan, Vo, Tam, Lehman, John H.

“…Radiation pressure has recently been shown to have practical application for multikilowatt continuous wave (CW) laser power measurement. One key advantage lies…”
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Using radiation pressure to develop a radio-frequency power measurement technique traceable to the redefined SI by Holloway, Christopher L., Simons, Matthew T., Kautz, Marcus D., Haddab, Abdulaziz H., Novotny, David, Lehman, John H., Williams, Paul A., Shaw, Gordon A.

“…We discuss a power-measurement technique traceable to the International System of Units (SI) based on radiation pressure (or radiation force) inherent in an…”
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Quantum calibrations traceable through classical radiometry by Stephens, Michelle, White, Malcolm G., Gerrits, Thomas, Tomlin, Nathan A., Lehman, John H.

“…A system for calibrating single photon detector efficiency that is traceable to the SI through a state-of-the-art classical optical fibre radiometer has been…”
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Core–shell composite of SiCN and multiwalled carbon nanotubes from toluene dispersion by Lehman, John H., Hurst, Katherine E., Singh, Gurpreet, Mansfield, Elisabeth, Perkins, John D., Cromer, Christopher L.

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Quartz-crystal microbalance for in situ monitoring of laser cleaning of carbon nanotubes by Hurst, Katherine E., Van Der Geest, Abram, Lusk, Mark, Mansfield, Elisabeth, Lehman, John H.

“…Photochemical changes of single-walled carbon nanotubes, graphite and amorphous carbon have been investigated with a quartz-crystal microbalance (QCM). The…”
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Purification of Single Wall Carbon Nanotubes As a Function of UV Wavelength, Atmosphere, and Temperature by Hurst, Katherine E, Dillon, Anne C, Yang, Shao, Lehman, John H

“…We investigate the purification of as-prepared single wall carbon nanotubes (SWCNTs) by exposure to pulsed 193 and 248 nm laser light, as well as lamp…”
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Inverted Spectra of Single-Wall Carbon Nanotube Films by Lehman, John H, Hurst, Katherine E, Roberson, Lara K, Nield, Kathryn, Hamlin, John D

“…We present absolute measurements of reflectance and absorbance for a purified single wall carbon nanotube (SWCNT) film. The absorbance spectrum of a…”
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Carbon multi-walled nanotubes grown by HWCVD on a pyroelectric detector by Lehman, John H., Deshpande, Rohit, Rice, Paul, To, Bobby, Dillon, Anne C.

“…Carbon multi-wall nanotubes (MWNTs) were grown on a lithium niobate (LiNbO 3) pyroelectric detector with a nickel film as the catalyst by hot-wire chemical…”
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Uncertainty Calculation for Spectral-Responsivity Measurements by Lehman, John H, Wang, C M, Dowell, Marla L, Hadler, Joshua A

“…This paper discusses a procedure for measuring the absolute spectral responsivity of optical-fiber power meters and computation of the calibration uncertainty…”
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Method to determine the absorptance of thin films for photovoltaic technology by Tomlin, N A, Lehman, J H, Hurst, K E, Tanner, D B, Kamaras, K, Pekker, A

“…We have demonstrated a novel method to determine optical properties of opaque or semi-transparent films for photovoltaic (PV) applications. Such films may be…”
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Absolute radiation pressure detector using a diamagnetically levitating test mass by Vaskuri, Anna K., Rahn, Daniel W., Williams, Paul A., Lehman, John H.

“…We have developed an absolute radiometer to measure laser power by means of radiation pressure in a closed control-loop configuration using diamagnetically…”
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Position and Temperature Dependence of Pyroelectricity in Domain-Engineered Stoichiometric and Congruent LiTaO3 by Lehman, John H., Pannell, Chris N.

“…Domain-engineered bicell (parallel compensated) pyroelectric detectors were constructed from stoichiometric and congruent lithium tantalate. The variation of…”
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Intramural Comparison of NIST Laser and Optical Fiber Power Calibrations by Lehman, John H, Vayshenker, Igor, Livigni, David J, Hadler, Joshua

“…The responsivity of two optical detectors was determined by the method of direct substitution in four different NIST measurement facilities. The measurements…”
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Sensitivity of a Plate Pyroelectric Detector to Ambient Acoustic Noise: The Significance of the Perfectly-Clamped Mounting Condition by Lehman, John, Gnewuch, Harald, Pannell, Chris

“…The unwanted sensitivity of a plate pyroelectric detector to airborne acoustic noise is depends critically on the mounting conditions for the plate. We…”
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