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Modal Symmetry Controlled Second-Harmonic Generation by Propagating Plasmons

Title data

Chen, Tzu-Yu ; Obermeier, Julian ; Schumacher, Thorsten ; Lin, Fan-Cheng ; Huang, Jer-Shing ; Lippitz, Markus ; Huang, Chen-Bin:
Modal Symmetry Controlled Second-Harmonic Generation by Propagating Plasmons.
In: Nano Letters. (23 August 2019) .
ISSN 1530-6992
DOI: https://doi.org/10.1021/acs.nanolett.9b02630

Abstract in another language

A new concept for second-harmonic generation (SHG) in an optical nanocircuit is proposed. We demonstrate both theoretically and experimentally that the symmetry of an optical mode alone is sufficient to allow SHG even in centro-symmetric structures made of centro-symmetric material. The concept is realized using a plasmonic two-wire transmission-line (TWTL), which simultaneously supports a symmetric and an antisymmetric mode. We first confirm that emission of second-harmonic light into the symmetric mode of the waveguide is symmetry-allowed when the fundamental excited waveguide modes are either purely symmetric or antisymmetric. We further switch the emission into the antisymmetric mode when a controlled mixture of the fundamental modes is excited simultaneously. Our results open up a new degree of freedom into the designs of nonlinear optical components and should pave a new avenue toward multifunctional nanophotonic circuitry.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Surface plasmon polaritons; second-harmonic generation; surface nonlinear optics; optical nanocircuit; polarization-selective control
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik III - Nanooptik > Lehrstuhl Experimentalphysik III - Nanooptik - Univ.-Prof. Dr. Markus Lippitz
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 04 Sep 2019 06:17
Last Modified: 04 Sep 2019 06:17
URI: https://eref.uni-bayreuth.de/id/eprint/52127