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
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SPIE Proceedings: Detection of high frequency acoustic transients using coherent EUV light
TL;DR: In this article, a time-delayed ultrafast Extreme Ultraviolet (EUV) radiation was used to probe transient surface phenomenon in three experimental geometries, and the results showed excellent signal-to-noise ratios (>10:1) and increased sensitivity to surface deformations directly attributable to reduced wavelength of the probing light.
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Uncovering temperature-dependent exciton-polariton relaxation mechanisms in hybrid organic-inorganic perovskites
Madeleine Laitz,Alexander E. Kaplan,Jude Deschamps,Ulugbek Barotov,Andrew H. Proppe,In'es Garc'ia-Benito,Anna Osherov,Giulia Grancini,Dane W. deQuilettes,Keith A. Nelson,Moungi G. Bawendi,Vladimir Bulovi'c +11 more
TL;DR: In this paper , temperature-dependent measurements of polaritons in low-dimensional perovskite wedged microcavities achieving a Rabi splitting of 260 ± 5 meV were performed.
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Coherent control of carrier and phonon dynamics in photoexcited bismuth
TL;DR: In this paper, the carrier relaxation and phonon oscillation in highly photo-excited bismuth are coherently controlled with double-pulse excitation, and the magnitudes of monotonic decays also oscillate with interpump delay.
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Improvement of minority-carrier lifetime in tin monosulfide via substrate engineering
Rupak Chakraborty,Vera Steinmann,Marek Hempel,Paul H. Rekemeyer,Benjamin K. Ofori-Okai,Katy Hartman,Amanda Youssef,Austin Akey,Keith A. Nelson,Silvija Gradečak,Jing Kong,Tonio Buonassisi +11 more
TL;DR: In this paper, the effect of structural defects on bulk recombination in thermally evaporated nanosulfide (SnS) devices was investigated using electron beam-induced current measurements.
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Multi-frame Interferometric Imaging with a Femtosecond Stroboscopic Pulse Train for Observing Irreversible Phenomena.
TL;DR: A high-speed single-shot multi-frame interferometric imaging technique enabling multiple interferometry images with femtosecond exposure time over a 50 ns event window to be recorded, following a single laser-induced excitation event is described.