4.6k citations · 5k across the 7 of their papers we have counts for
7 papers
High-precision measurements of terahertz polarization states with a fiber coupled time-domain THz spectrometer
Zhenisbek Tagay, Ralph Romero, N. P. Armitage
We present a new method for high precision measurements of polarization rotation in the frequency range from 0.2 to 2.2 THz using a fiber coupled time-domain THz spectrometer. A fr…
Revealing novel aspects of light-matter coupling in terahertz two-dimensional coherent spectroscopy: the case of the amplitude mode in superconductors
Kota Katsumi, Jacopo Fiore, Mattia Udina +7
Recently developed terahertz (THz) two-dimensional coherent spectroscopy (2DCS) is a powerful technique to obtain materials information in a fashion qualitatively different from ot…
Efficient Terahertz Harmonic Generation with Coherent Acceleration of Electrons in the Dirac Semimetal Cd3As2
Bing Cheng, Natsuki Kanda, Tatsuhiko N. Ikeda +7
We report strong terahertz (~10^12 Hz) high harmonic generation in thin films of Cd3As2, a three-dimensional Dirac semimetal at room temperature. The third harmonics is detectable…
Resolving continua of fractional excitations by spinon echo in THz 2D coherent spectroscopy
Yuan Wan, N. P. Armitage
We show that the new technique of terahertz 2D coherent spectroscopy is capable of giving qualitatively new information about fractionalized spin systems. For the prototypical exam…
Weyl and Dirac Semimetals in Three Dimensional Solids
N. P. Armitage, E. J. Mele, Ashvin Vishwanath
Weyl and Dirac semimetals are three dimensional phases of matter with gapless electronic excitations that are protected by topology and symmetry. As three dimensional analogs of gr…
Record Surface State Mobility and Quantum Hall Effect in Topological Insulator Thin Films via Interface Engineering
Nikesh Koirala, Matthew Brahlek, Maryam Salehi +11
Material defects remain as the main bottleneck to the progress of topological insulators (TIs). In particular, efforts to achieve thin TI samples with dominant surface transport ha…