Nanoscale terahertz scanning probe microscopy

Autor: Vedran Jelic, Tyler L. Cocker, Rainer Hillenbrand, Frank A. Hegmann

Publikováno v: Nature Photonics. 15:558-569

Terahertz radiation has become an important diagnostic tool in the development of new technologies. However, the diffraction limit prevents terahertz radiation (λ ≈ 0.01–3 mm) from being focused to the nanometre length scale of modern devices. I

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3b37e03fb7ff7d3b75bc47c655ee6d75
https://doi.org/10.1038/s41566-021-00835-6

Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons

Autor: Carlo A. Pignedoli, Y. Wei, Tyler L. Cocker, Pascal Ruffieux, Roman Fasel, M. Hassan, Shang-Fan Lee, V. N. Breslin, Qiang Sun, Spencer E. Ammerman, Vedran Jelic, Nathan Everett

Publikováno v: Ammerman, S. E.; Jelic, V.; Wei, Y.; Breslin, V. N.; Hassan, M.; Everett, N.; Lee, S.; Sun, Q.; Pignedoli, C. A.; Ruffieux, P.; Fasel, Roman; Cocker, T. L. (2021). Lightwave-driven scanning tunnelling spectroscopy of atomically precise graphene nanoribbons. Nature Communications, 12(1), p. 6794. Springer Nature 10.1038/s41467-021-26656-3
Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)
Nature Communications

Atomically precise electronics operating at optical frequencies require tools that can characterize them on their intrinsic length and time scales to guide device design. Lightwave-driven scanning tunnelling microscopy is a promising technique toward

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca11840e7f4f5a95a21cb5fad60d9340
https://boris.unibe.ch/164881/1/21_Ammerman_Nat._Commun._Lightwave-driven_scanning_tunnelling_spectroscopy_of_atomically_precise_graphene_nanoribbons.pdf

Mapping the ultrafast charge transfer in van der Waals heterostructures

Autor: Fabian Sandner, Thomas Siday, Felix Schiegl, Martin Zizlsperger, Markus Plankl, Rupert Huber, Jessica L. Boland, Tyler L. Cocker, Fabian Moosharmmer, Markus A. Huber

Publikováno v: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).

We employ THz near-field microscopy to investigate ultrafast interlayer charge transfer in van der Waals heterostructures (HS) by tracing the resulting THz emission on the nanoscale. We further employ a novel concept of contact-free tunneling microsc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8d900ef61c2b1707ea65f3d98583e61b
https://doi.org/10.1109/irmmw-thz46771.2020.9370645

Nanoscale Mid-Infrared Near-Field Tomography of Topological Insulator Surfaces

Autor: Markus Plankl, Gregor Mussler, J. Kampmeier, Fabian Sandner, Rupert Huber, Christian Weyrich, Markus A. Huber, Fabian Mooshammer, Martin Lanius, Martin Zizlsperger, Detlev Grützmacher, Tyler L. Cocker, Jessica L. Boland, Helena Weigand

Publikováno v: Scopus-Elsevier

Three-dimensional topological insulators (TIs) have become an interesting platform for future high-speed electronics. The massless Dirac fermions in topologically protected surface states (TSSs) feature a chiral spin texture, which gives rise to inhe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed323af5ec303d4082cecb146ae57661
https://doi.org/10.1109/cleoe-eqec.2019.8872974

Nanoscale Spectroscopy of Surface States on a Three-Dimensional Topological Insulator

Autor: Gregor Mussler, Rupert Huber, Christian Weyrich, Helena Weigand, Tyler L. Cocker, Markus A. Huber, Fabian Mooshammer, Detlev Grützmacher, Martin Lanius, Jessica L. Boland, J. Kampmeier, Fabian Sandner, Markus Plankl, Martin Zizlsperger

Publikováno v: Frontiers in Optics + Laser Science APS/DLS.

We retrieve the local dielectric function of a few-nm-thick surface layer on a threedimensional topological insulator by mid-infrared nano-tomography and find the coexistence of a massive electron gas and the topologically protected surface states.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::33ee20b38c34f21cc546b5d6d6f201f5
https://doi.org/10.1364/fio.2019.jw3a.121