Kavli Affiliate: Menno Veldhorst | First 5 Authors: Lucas E. A. Stehouwer, Alberto Tosato, Davide Degli Esposti, Davide Costa, Menno Veldhorst | Summary: We grow strained Ge/SiGe heterostructures by reduced-pressure chemical vapor deposition on 100 mm Ge wafers. The use of Ge wafers as substrates for epitaxy enables high-quality Ge-rich SiGe strain-relaxed buffers with a […]
Kavli Affiliate: Feng Wang | First 5 Authors: Guorui Chen, Ya-Hui Zhang, Aaron Sharpe, Zuocheng Zhang, Shaoxin Wang | Summary: Wigner crystals are predicted as the crystallization of the dilute electron gas moving in a uniform background when the electron-electron Coulomb energy dominates the kinetic energy. The Wigner crystal has previously been observed in the […]
Kavli Affiliate: Alireza Marandi | First 5 Authors: Tsung-Han Wu, Luis Ledezma, Connor Fredrick, Pooja Sekhar, Ryoto Sekine | Summary: The introduction of nonlinear nanophotonic devices to the field of optical frequency comb metrology has enabled new opportunities for low-power and chip-integrated clocks, high-precision frequency synthesis, and broad bandwidth spectroscopy. However, most of these advances […]
Kavli Affiliate: Scott K. Cushing | First 5 Authors: Nathan Harper, Bryce P. Hickam, Manni He, Scott K. Cushing, | Summary: Fluorescence lifetime experiments are a standard approach for measuring excited state dynamics and local environment effects. Here, we show that entangled photon pairs produced from a continuous-wave (CW) laser diode can replicate pulsed laser […]
Kavli Affiliate: Feng Wang | First 5 Authors: Feng Wang, Xiaohua Zhu | Summary: We prove that the Gromov-Hausdorff limit of K”ahler-Ricci flow on a $mathbf G$-spherical Fano manifold $X$ is a $mathbf G$-spherical $mathbb Q$-Fano variety $X_{infty}$, which admits a (singular) K”ahler-Ricci soliton. Moreover, the $mathbf G$-spherical variety structure of $X_{infty}$ can be constructed […]
Kavli Affiliate: L. Mahadevan | First 5 Authors: J. S. Yodh, F. Giardina, S. Gokhale, L. Mahadevan, | Summary: At sufficiently high concentrations, motile bacteria suspended in fluids exhibit a range of ordered and disordered collective motions. Here we explore the combined effects of confinement, periodicity and curvature induced by the active motion of E. […]
Kavli Affiliate: Jeffrey B. Neaton | First 5 Authors: Galit Cohen, Jonah B. Haber, Jeffrey B. Neaton, Diana Y. Qiu, Sivan Refaely-Abramson | Summary: Non-radiative exciton relaxation processes are critical for energy transduction efficiencies in optoelectronic materials, but how these processes are connected to the underlying crystal structure and its associated electron, exciton, and phonon […]
Kavli Affiliate: Alireza Marandi | First 5 Authors: Midya Parto, Christian Leefmans, James Williams, Alireza Marandi, | Summary: Sensors are indispensable tools of modern life that are ubiquitously used in diverse settings ranging from smartphones and autonomous vehicles to the healthcare industry and space technology. By interfacing multiple sensors that collectively interact with the signal […]
Kavli Affiliate: Alireza Marandi | First 5 Authors: Ryotatsu Yanagimoto, Rajveer Nehra, Edwin Ng, Alireza Marandi, Hideo Mabuchi | Summary: We propose a scheme to realize cubic quantum nondemolition (QND) Hamiltonian with optical parametric interactions. We show that strongly squeezed fundamental and second harmonic fields propagating in a $chi^{(2)}$ nonlinear medium effectively evolve under a […]
Kavli Affiliate: David A. Muller | First 5 Authors: Zeming Sun, Zhaslan Baraissov, Catherine A. Dukes, Darrah K. Dare, Thomas Oseroff | Summary: Surface structures on radio-frequency (RF) superconductors are crucially important in determining their interaction with the RF field. Here we investigate the surface compositions, structural profiles, and valence distributions of oxides, carbides, and […]