Abstract
Nanostructures with broken symmetry can interact with circularly polarized light to mimic chiroptical (chiral-optical) effects, usually observable in chiral media. This phenomenon is known as extrinsic chirality. Second harmonic generation (SHG) is extremely sensitive to symmetry breaking, down to a single atomic monolayer and it has been extensively used as a probe of extrinsic chirality. Here we present SHG measurements of GaAs nanowires partially covered with Au, fabricated by a self-catalysed technique. The Au coated GaAs nanowires give rise to a dramatic circular dichroism in the generated second harmonic signal, compared to nanowires without coating.
Original language | English |
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Title of host publication | 20th Italian National Conference on Photonic Technologies (Fotonica 2018) |
Publisher | Institution of Engineering and Technology |
Edition | CP748 |
ISBN (Electronic) | 978-1-78561-991-5 |
ISBN (Print) | 9781785617911 |
DOIs | |
Publication status | Published - 16 May 2019 |
Event | 20th Italian National Conference on Photonic Technologies, Fotonica 2018 - Lecce, Italy Duration: 23 May 2018 → 25 May 2018 |
Publication series
Name | IET Conference Publications |
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Number | CP748 |
Volume | 2018 |
Conference
Conference | 20th Italian National Conference on Photonic Technologies, Fotonica 2018 |
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Country/Territory | Italy |
City | Lecce |
Period | 23/05/18 → 25/05/18 |
Funding
Funding from the Academy of Finland Project NESP (decision number 294630) and NANoS (decision number 260815) is acknowledged. EU COST MP1403 NQO is also acknowledged. D.C.H acknowledges funding and support from the Engineering and Physical Sciences Research Council (EPSRC) Centre for Doctoral Training in Condensed Matter Physics (CDTCMP), Grant No. EP/L015544/1. J.T.C and V.K.V acknowledge funding from the Royal Society.
Keywords
- Extrinsic chirality
- GaAs nanowires
- Plasmonic coating
- Second harmonic generation
ASJC Scopus subject areas
- Electrical and Electronic Engineering