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.
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Journal ArticleDOI
Phase Transition Dynamics Studied by Coherent Phonon Excitation with Ultrashort Laser Pulses
TL;DR: In this article, a coherent phonon excitation method was proposed to observe the time dependence of the soft phonons excited artificially in terms of pico or femtosecond laser pulses.
Proceedings ArticleDOI
Multiple-quantum 2D spectroscopy of many-body correlations in GaAs quantum wells
TL;DR: In this article, a multiple-quantum two-dimensional Fourier transform optical (2D FTOPT) spectroscopy was developed and conducted on GaAs quantum wells and spatiotemporal femtosecond pulse shaping was used to control the optical phases and time delays of ultrashort pulses in multiple non-collinear beams.
Interferometric analysis of cylindrically focused laser-driven shock waves
TL;DR: In this paper, the authors apply time-resolved interferometric imaging to study laser-driven focused shock waves on the microscale and obtain a series of images tracing the converging shock wave as it collapses to a focal point and then reemerges as a divergent shock wave eventually leaving behind a cavitation bubble at the focus.
Journal ArticleDOI
Nondestructive Optical Characterization of Radiationhardened Polyimide Films
TL;DR: A noncontact, non-destructive method is used to determine viscoelastic and thermal transport properties of a DuPont Kapton film before and after neutron irradiation to determine the changes that would be expected to occur in a nuclear reactor environment as discussed by the authors.
Proceedings ArticleDOI
Detection of thermal and acoustic transients in materials using heterodyned euv radiation
Ra'anan Tobey,Erez Gershgoren,Margaret M. Murnane,Henry C. Kapteyn,Thomas Feurer,Keith A. Nelson +5 more
TL;DR: In this article, nonlinear optical photoacoustic techniques have been extended from the visible to the EUV using high harmonics for the first time, enabling measurements of thermal and acoustic transients in materials with sub-100 nm spatial resolution.