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
Proceedings ArticleDOI
Noncontact inspection of opaque film thickness in single layer and multilayer structures and edge-exclusion zones
TL;DR: In this article, an optical measurement method called impulsive stimulated thermal scattering (ISTS) is proposed for determining the thickness of opaque films with angstrom repeatability. But the method is not suitable for the measurement of beveled layer edges.
Journal Article
Terahertz-frequency magnon-phonon-polaritons in the strong coupling regime
Proceedings ArticleDOI
The interaction of THz phonon-polariton waves with microstructures observed using quantitative, phase-sensitive imaging
Christopher A. Werley,Kebin Fan,Andrew C. Strikwerda,Qiang Wu,Kung-Hsuan Lin,Richard D. Averitt,Keith A. Nelson +6 more
TL;DR: In this article, phase-sensitive imaging was applied to enable sharply focused visualization of terahertz waves in electro-optic media, allowing quantitative characterization of THz waves as they interact with microstructures on or in the sample, yielding new insight into these interactions.
Proceedings ArticleDOI
Terahertz Kerr Effect in an Organic Ferroelectric
TL;DR: Using the terahertz (THz) Kerr effect, this article recorded nonlinear time-domain vibrational responses in tris-sarcosine calcium chloride (TSCC) through two interactions with THz fields.
Proceedings ArticleDOI
Measurement of Effective Refractive Index Ellipse of LiNbO3 Subwavelength Slab Waveguide for Thz Phonon Polariton Wave
TL;DR: In this paper, the propagation process of a phonon polariton wave in 50 micrometer LiNbO3 slab waveguide is recorded using polarization gating imaging system and the effective refractive indexes of different models are calculated from the dispersion curves.