Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 31: Plasmonics & Nanooptics II: SHG and Dielectric Properties (joint session O/CPP)
O 31.10: Vortrag
Dienstag, 2. April 2019, 16:15–16:30, H8
Tunable Low Loss 1D Surface Plasmons in InAs Nanowires — •Yixi Zhou1, Jianing Chen1, and Thomas Taubner2 — 1Institute of Physics, CAS — 2Institute of Physics (IA), RWTH Aachen
Due to the ability to manipulate photons at the nanoscale, plasmonics has become one of the most important branches in nanophotonics [1]. The prerequisites for the technological application of plasmons include high confining ability (λ0/λp), low damping, and easy tunability. However, plasmons in typical plasmonic materials, i.e. noble metals, cannot satisfy these three requirements simultaneously, therefore limiting their overall applicability [2].
Here, indium arsenide (InAs) nanowires are identified as a material that satisfies all three prerequisites, providing a platform for modern nanophotonics. The dispersion relation of InAs plasmons is determined using the nanoinfrared imaging technique, and show that their associated wavelengths and damping ratios can be tuned by altering the nanowire diameter and dielectric environment. The launched plasmons simultaneously exhibit high confinement factor (λ0/λp = 34) and low damping rate (γ−1=25) [3]. The observation of InAs plasmons could enable novel plasmonic circuits for future subwavelength applications.
[1] J. A. Schuller et al., Nat. Mater. 9, 193 (2010).
[2] D. K. Gramotnev et al., Nat. Photonics. 4, 83 (2010).
[3] Y. Zhou et al., Adv. Mater. 30, 1802551 (2018).