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
Nanoscale photothermal and photoacoustic transients probed with extreme ultraviolet radiation
Ra'anan Tobey,Erez Gershgoren,Mark E. Siemens,Margaret M. Murnane,Henry C. Kapteyn,Thomas Feurer,Keith A. Nelson +6 more
TL;DR: In this article, the authors demonstrate the use of extreme ultraviolet (EUV) light for time-resolved measurements of the photothermal and photoacoustic response of materials, using a small scale coherent EUV sources employing high-harmonic generation.
Journal ArticleDOI
Stable switching among high-order modes in polariton condensates
Yongbao Sun,Yoseob Yoon,Saeed A. Khan,Li Ge,Mark Steger,Loren Pfeiffer,Ken W. West,Hakan E. Türeci,David W. Snoke,Keith A. Nelson +9 more
TL;DR: In this article, a multistate optical switching among high-order bouncing-ball modes (ripples) and whisperinggallery modes (petals) of exciton-polariton condensates in a laser-generated annular trap is reported.
Patent
High-fidelity spatial light modulator
Marc M. Wefers,Keith A. Nelson +1 more
TL;DR: In this article, a light modulator is described which generates an output optical field from an input optical field using two polarization-rotating elements which are directly attached to one another.
Journal ArticleDOI
Direct visualization of the Gouy phase by focusing phonon polaritons.
TL;DR: It is demonstrated that under these conditions the phase anomaly (Gouy phase) may be visualized directly through spatiotemporal imaging as the cylindrical wave propagates through its focus.
Journal ArticleDOI
Experimental and theoretical analysis of THz-frequency, direction-dependent, phonon polariton modes in a subwavelength, anisotropic slab waveguide
TL;DR: From the dispersion relations, the propagation-direction-dependent behavior, effective refractive index values, and generation efficiencies for THz-frequency modes in the subwavelength, anisotropic slab waveguide are analyzed.