K
Keith A. Nelson
Researcher at Massachusetts Institute of Technology
Publications - 750
Citations - 30478
Keith A. Nelson is an academic researcher from Massachusetts Institute of Technology. The author has contributed to research in topics: Terahertz radiation & Femtosecond. The author has an hindex of 85, co-authored 727 publications receiving 26755 citations. Previous affiliations of Keith A. Nelson include Harvard University & Philips.
Papers
More filters
Journal ArticleDOI
Experimental investigation of nanofluid shear and longitudinal viscosities
Alexander Schmidt,Matteo Chiesa,Darius H. Torchinsky,Jeremy A. Johnson,Avid Boustani,Gareth H. McKinley,Keith A. Nelson,Gang Chen +7 more
TL;DR: In this paper, an optical technique was used to measure the longitudinal viscosity of nanoparticles in decane and isoparaffinic polyalphaolefin (PAO) suspensions at frequencies from 200to600MHz and evaluate an effective hydrodynamic particle size.
Journal ArticleDOI
Tunable multi-cycle THz generation in organic crystal HMQ-TMS.
TL;DR: THz pulses generated from HMQ-TMS show up to 20 times higher pulse energies compared to the benchmark inorganic THz generator ZnTe under identical conditions.
Journal ArticleDOI
Time-resolved imaging of near-fields in THz antennas and direct quantitative measurement of field enhancements.
Christopher A. Werley,Kebin Fan,Andrew C. Strikwerda,Stephanie M. Teo,Xin Zhang,Richard D. Averitt,Keith A. Nelson +6 more
TL;DR: The scaling of enhancement and resonant frequency with gap size and antenna length agrees well with simulations, and the spectral response is determined over a bandwidth spanning from DC across multiple resonances.
Journal ArticleDOI
Impulsive stimulated light scattered from glass‐forming liquids. II. Salol relaxation dynamics, nonergodicity parameter, and testing of mode coupling theory
Yongwu Yang,Keith A. Nelson +1 more
TL;DR: In this article, the nonergodicity parameter fq of mode-coupling theory (MCT) in the limit of the small wave vector q is evaluated and its temperature dependence shows a square-root cusp at a crossover temperature of Tc=266 K, consistent with neutron scattering measurements at high q and with light scattering results.
Journal ArticleDOI
Coherent exciton dynamics in supramolecular light-harvesting nanotubes revealed by ultrafast quantum process tomography.
Joel Yuen-Zhou,Dylan H. Arias,Dorthe M. Eisele,Colby P. Steiner,Jacob J. Krich,Moungi G. Bawendi,Keith A. Nelson,Alán Aspuru-Guzik,Alán Aspuru-Guzik +8 more
TL;DR: In this paper, a quantum process tomography (QPT) was proposed to reconstruct the evolving quantum state of excitons in double-walled supramolecular light-harvesting nanotubes at room temperature from eight narrowband transient grating experiments.