Temperature stability of individual plasmonic Au and TiN nanodiscs

TY - JOUR

T1 - Temperature stability of individual plasmonic Au and TiN nanodiscs

AU - Bower, Ryan

AU - McPolin, Cillian P.T.

AU - Krasavin, Alexey V.

AU - Zayats, Anatoly V.

AU - Petrov, Peter K.

N1 - Funding Information: European Research Council (789340); Engineering and Physical Sciences Research Council (EP/L015277/1, EP/M013812/1, EP/P02520X/1, EP/R00661X/1, EP/V001914/). Publisher Copyright: © 2022 OSA - The Optical Society. All rights reserved.

PY - 2022/9/1

Y1 - 2022/9/1

N2 - Refractory plasmonic materials are of interest for high-temperature plasmonic applications due to their increased thermal stability when compared to gold and silver. Titanium nitride (TiN) has been highlighted as a promising refractory material, offering both strong plasmonic and thermal performance. In this work, we analyze the stability of both the structural and optical response of individual plasmonic nanodiscs of various diameters subjected to elevated temperature conditions in air. Using cathodoluminescence spectroscopy, we trace the resonance spectra and shape modifications of the same single TiN and Au discs annealed at increasing temperatures up to 325 °C. TiN discs display greater morphological stability, but the optical properties of both materials deteriorate from 200 °C, although the mechanisms of degradation are different. The results are essential for optimizing nanostructured materials for high temperature nanophotonic applications.

AB - Refractory plasmonic materials are of interest for high-temperature plasmonic applications due to their increased thermal stability when compared to gold and silver. Titanium nitride (TiN) has been highlighted as a promising refractory material, offering both strong plasmonic and thermal performance. In this work, we analyze the stability of both the structural and optical response of individual plasmonic nanodiscs of various diameters subjected to elevated temperature conditions in air. Using cathodoluminescence spectroscopy, we trace the resonance spectra and shape modifications of the same single TiN and Au discs annealed at increasing temperatures up to 325 °C. TiN discs display greater morphological stability, but the optical properties of both materials deteriorate from 200 °C, although the mechanisms of degradation are different. The results are essential for optimizing nanostructured materials for high temperature nanophotonic applications.

UR - http://www.scopus.com/inward/record.url?scp=85137668428&partnerID=8YFLogxK

U2 - 10.1364/OME.462582

DO - 10.1364/OME.462582

M3 - Article

AN - SCOPUS:85137668428

SN - 2159-3930

VL - 12

SP - 3471

EP - 3479

JO - Optical materials express

JF - Optical materials express

IS - 9

ER -