Radiative pumping and propagation of plexcitons in diffractive plasmonic crystals. - In: Nano letters, ISSN 1530-6992, Bd. 18 (2018), 8, S. 4927-4933, insges. 7 S.
Gesehen am 11.03.2020
Strong coupling between plasmons and excitons leads to the formation of plexcitons: quasiparticles that combine nanoscale energy confinement and pronounced optical nonlinearities. In addition to these localized modes, the enhanced control over the dispersion relation of propagating plexcitons may enable coherent and collective coupling of distant emitters. Here, we experimentally demonstrate strong coupling between carbon nanotube excitons and spatially extended plasmonic modes formed via diffractive coupling of periodically arranged gold nanoparticles (nanodisks, nanorods). Depending on the light-matter composition, the rather long-lived plexcitons (>100 fs) undergo highly directional propagation over 20 m. Near-field energy distributions calculated with the finite-difference time-domain method fully corroborate our experimental results. The previously demonstrated compatibility of this plexcitonic system with electrical excitation opens the path to the realization of a variety of ultrafast active plasmonic devices, cavity-assisted energy transport and low-power optoelectronic components.
https://doi.org/10.1021/acs.nanolett.8b01733
Strong spatial and spectral localization of surface plasmons in individual randomly disordered gold nanosponges. - In: Nano letters, ISSN 1530-6992, Bd. 18 (2018), 8, S. 4957-4964
https://doi.org/10.1021/acs.nanolett.8b01785
Magnetron sputtered AlN layers on LTCC multilayer and silicon substrates. - In: Coatings, ISSN 2079-6412, Bd. 8 (2018), 8, 289, S. 1-19
https://doi.org/10.3390/coatings8080289
Optimization of self-propagating reaction properties through Al-molar ratios in ternary Titanium-Silicon-Aluminum reactive multilayer films. - In: Vacuum, ISSN 0042-207X, Bd. 156 (2018), S. 205-211
https://doi.org/10.1016/j.vacuum.2018.07.033
Deep etched and released microstructures in Zerodur in a fluorine-based plasma. - In: Microelectronic engineering, Bd. 198 (2018), S. 78-84
https://doi.org/10.1016/j.mee.2018.07.004
Localized collection of airborne biological hazards for environmental monitoring. - In: Sensors and actuators, ISSN 0925-4005, Bd. 273 (2018), S. 906-915
https://doi.org/10.1016/j.snb.2018.06.129
Monolithic photoelectrochemical device for direct water splitting with 19% efficiency. - In: ACS energy letters, ISSN 2380-8195, Bd. 3 (2018), 8, S. 1795-1800
https://doi.org/10.1021/acsenergylett.8b00920
An analytical temperature-dependent design model for contour-mode MEMS resonators and oscillators verified by measurements. - In: Sensors, ISSN 1424-8220, Bd. 18 (2018), 7, 2159, insges. 21 S.
https://doi.org/10.3390/s18072159
Electrodeposition of cuprous oxide on boron doped diamond electrodes. - In: Advances in electrical and electronic engineering, ISSN 1804-3119, Bd. 16 (2018), 2, S. 239-245
https://doi.org/10.15598/aeee.v16i2.2778
Lorentz force velocimetry using a bulk HTS magnet system: proof-of-concept. - In: Superconductor science and technology, ISSN 1361-6668, Bd. 31 (2018), 8, 084003, insges. 9 S.
This paper presents a proof-of-concept of the idea of using bulk high-temperature superconducting (HTS) materials as quasi-permanent magnets that would form, in the future, an integral part of an advanced Lorentz force velocimetry (LFV) system. The experiments, calculations and numerical simulations are performed in accordance with the fundamental theory of LFV, whereby a moving metal rod passes through a static magnetic field, in our case generated by the bulk HTSs. The bulk HTS magnet system (MS) consists of two Y-Ba-Cu-O samples in the form of bulk cylindrical discs, which are encapsulated in an aluminium holder and wrapped with styrofoam. The aluminium holder is designed to locate the bulk HTS magnets on either side of the metal rod. After field cooling magnetisation with an applied field of 1.5 T at 77 K, the bulk HTS MS provides a quasi-permanent magnetic field over 240 s, enabling Lorentz force measurements to be carried out with a constant velocity of the metal rod. Two sets of Lorentz force measurements with copper and aluminium rods with velocities ranging from approximately 54-81 mm s-1 were performed. The obtained results, which are validated using a numerical model developed in COMSOL Multiphysics, demonstrate the linear relationship between the Lorentz force and velocity of the moving conductor. Finally, the potential of generating very high magnetic fields using bulk HTS that would enable LFV in even weakly-conducting and slow-flowing fluids, e.g., glass melts, is discussed.
https://doi.org/10.1088/1361-6668/aac949