Tootfinder

Oh das von der Hamburger #SPD zerstörte Feuchtwiesengebiet feiert 10-Jähriges! Gebaut wurde da immer noch nicht:
„Vor zehn Jahren hatte die Stadt damit begonnen, in Neuland ein Landschaftsschutzgebiet und den Lebensraum von geschützten Tierarten plattzumachen, um ein Industriegebiet mit höchster Klimaschutz-Qualität zu schaffen. Doch auf den 27 Hektar Sandwüste mit Autobahnanschluss tu…

Efficient broadband terahertz generation by above band-gap excitation of the pyroelectric ZnSnN2
T. S. Seifert, H. Hempel, O. G\"uckstock, R. Schneider, Q. Remy, A. Fioretti, T. Unold, S. Michaelis de Vasconcellos, R. Bratschitsch, R. Eichberger, K. D\"orr, A. Zakutayev, T. Kampfrath
https://arxiv.org/abs/2506.09528

Efficient broadband terahertz generation by above band-gap excitation of the pyroelectric ZnSnN2
Terahertz (THz) radiation is a powerful probe of low-energy excitations in all phases of matter. However, it remains a challenge to find materials that efficiently generate THz radiation in a broad range of frequencies following optical excitation. Here, we investigate a pyroelectric material, ZnSnN2, and find that above-band-gap excitation results in the efficient formation of an ultrafast photocurrent generating THz radiation. The resulting THz electric field spans a frequency range from belo…

Effect of current on terahertz plasmons in AlGaN/GaN heterostructures
M. Dub (CENTERA, CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland, Institute of High Pressure Physics PAS, 01-142 Warsaw, Poland), P. Sai (CENTERA, CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland, Institute of High Pressure Physics PAS, 01-142 Warsaw, Poland), Y. Ivonyak (CENTERA, CEZAMAT, Warsaw University of Technology, 02-822 Warsaw, Poland, Institute of High Pressure Physics PAS, 01…

Effect of current on terahertz plasmons in AlGaN/GaN heterostructures
Terahertz transmittance spectra of plasmonic crystals based on two-dimensional electron gas in AlGaN/GaN heterostructures were studied in grating-gate and gateless plasmonic crystals as a function of lateral bias. The decrease of the plasmon resonance frequencies (redshift) with increase of the lateral current was observed for both types of structures. We show that the change of the electron concentration profile and Joule heating are the main phenomena responsible for the shift of plasma reson…

Bewegende Botschaft - Schwarzenegger trauert um die Amok-Opfer in Graz #News #Nachrichten

Visualizing a Terahertz Superfluid Plasmon in a Two-Dimensional Superconductor
Alexander von Hoegen, Tommy Tai, Clifford J. Allington, Matthew Yeung, Jacob Pettine, Marios H. Michael, Emil Vi\~nas Bostr\"om, Xiaomeng Cui, Kierstin Torres, Alexander E. Kossak, Byunghun Lee, Geoffrey S. D. Beach, Angel Rubio, Philip Kim, Nuh Gedik
https://

Visualizing a Terahertz Superfluid Plasmon in a Two-Dimensional Superconductor
The superconducting gap defines the fundamental energy scale for the emergence of dissipationless transport and collective phenomena in a superconductor. In layered high-temperature cuprate superconductors, where the Cooper pairs are confined to weakly coupled two-dimensional copper-oxygen planes, terahertz (THz) spectroscopy at sub-gap millielectronvolt energies has provided crucial insights into the collective superfluid response perpendicular to the superconducting layers. However, within th…

So sehen die #Schwalbe #Hurricane nach ungefähr 1000 km aus.
Ich muss sagen, ich bin nicht unzufrieden. Haben einen sehr guten Geradeauslauf und rollen bei maximal-Druck auch wirklich ähnlich hervorragend wie der

Disentangling Electronic and Ionic Nonlinear Polarization Effects in the THz Kerr Response of LaAlO$_{3}$
Chao Shen, Maximilian Frenzel, Sebastian F. Maehrlein, Zhanybek Alpichshev
https://arxiv.org/abs/2506.10472

Disentangling Electronic and Ionic Nonlinear Polarization Effects in the THz Kerr Response of LaAlO$_{3}$
Nonlinear responses to intense terahertz (THz) fields provide unique insights into complex dynamics of contemporary material systems. However, the interpretation of the obtained data, in particular, distinguishing genuine ionic oscillations from the instantaneous electronic responses in THz Kerr effect remains challenging. Here, we combine two-dimensional Terahertz Kerr effect (2D-TKE) spectroscopy experiments and their modeling to unravel complex THz-induced temporal oscillations in twinned La…

Correlating Superconducting Qubit Performance Losses to Sidewall Near-Field Scattering via Terahertz Nanophotonics
Richard H. J. Kim, Samuel J. Haeuser, Joong-Mok Park, Randall K. Chan, Jin-Su Oh, Thomas Koschny, Lin Zhou, Matthew J. Kramer, Akshay A. Murthy, Mustafa Bal, Francesco Crisa, Sabrina Garattoni, Shaojiang Zhu, Andrei Lunin, David Olaya, Peter Hopkins, Alex Romanenko, Anna Grassellino, Jigang Wang

Correlating Superconducting Qubit Performance Losses to Sidewall Near-Field Scattering via Terahertz Nanophotonics
Elucidating dielectric losses, structural heterogeneity, and interface imperfections is critical for improving coherence in superconducting qubits. However, most diagnostics rely on destructive electron microscopy or low-throughput millikelvin quantum measurements. Here, we demonstrate noninvasive terahertz (THz) nano-imaging/-spectroscopy of encapsulated niobium transmon qubits, revealing sidewall near-field scattering that correlates with qubit coherence. We further employ a THz hyperspectral…

Amok-Horror in Graz - Lehrer, Schulwart und Polizisten retteten Leben #News #Nachrichten

Theory of terahertz pulse transmission through ferroelectric nanomembranes
Yujie Zhu, Aiden Ross, Xiangwei Guo, Venkatraman Gopalan, Long-Qing Chen, Jia-Mian Hu
https://arxiv.org/abs/2506.00370

Theory of terahertz pulse transmission through ferroelectric nanomembranes
An analytical model is developed to predict the temporal evolution of the lattice polarization in ferroelectric nanomembranes upon the excitation by a terahertz (THz) electromagnetic pulse of an arbitrary waveform, and the concurrent transmission of the THz pulse in both the linear and the nonlinear regimes. It involves the use of the perturbation method to solve the equation of motion for the lattice polarization in both unclamped and strained ferroelectric nanomembranes within the framework o…