Regensburg 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Plasmonics II (joint session O/CPP)
CPP 27.1: Vortrag
Dienstag, 2. April 2019, 14:00–14:15, H8
Sum-Frequency Generation Enhanced by Localized Surface Phonon Polaritons — •Riko Kiessling1, Yujin Tong1, Alexander J. Giles2, Joshua D. Caldwell2,3, Martin Wolf1, and Alexander Paarmann1 — 1Fritz-Haber-Institut der MPG, Berlin, Germany — 2U.S. Naval Research Laboratory, Washington, D.C., USA — 3Vanderbilt University, Nashville, USA
Nanophotonic devices open the way to tailor light-matter interaction on the nano-scale by specifically designed structures of solid-state material. This is advantageous for, e.g., the sub-diffractional localization of light, which fosters amplification of nonlinear optical frequency conversion processes by enhancement of local electric fields.
Here, we employ localized surface phonon polariton modes in nano-structured polar dielectric media [1] to resonantly increase the nonlinear response. In contrast to surface plasmons, the optical phonon-based approach exhibits significantly lower optical losses. By means of IR-VIS sum-frequency generation spectroscopy [2], a strong modulation of the local electromagnetic fields, and thus, amplified up-conversion radiation, is observed. Intensity and spectral position of the nonlinear emission can be manipulated by the nanostructure design. In this way, sub-wavelength sized architectures prove to be an efficient method for the control of localized fields associated with three-dimensionally confined optical modes in the mid-infrared spectral region.
[1] Razdolski et al., Nano Lett. 16, 6954 (2016)
[2] Kiessling et al., Phys. Rev. Accel. Beams 21, 080702 (2018)