Imperial College London

ProfessorNeilAlford

Central FacultyOffice of the Provost

Associate Provost (Academic Planning)
 
 
 
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Contact

 

+44 (0)20 7594 6724n.alford

 
 
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Assistant

 

Miss Catherine Graham +44 (0)20 7594 3330

 
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Location

 

2..05 (in RSM) or 3.09 (in the Faculty Building)Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wells:2018:10.1364/OE.26.015726,
author = {Wells, M and Bower, R and Kilmurray, B and Zou, B and Mihai, AP and GOBALAKRICHENANE, G and Alford, NM and Oulton, RFM and Cohen, L and Maier, SA and ZAYATS, A and Petrov, PK},
doi = {10.1364/OE.26.015726},
journal = {Optics Express},
pages = {15726--15744},
title = {Temperature stability of thin film refractory plasmonic materials},
url = {http://dx.doi.org/10.1364/OE.26.015726},
volume = {12},
year = {2018}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Materials such as W, TiN, and SrRuO3 (SRO) have been suggested as promising alternatives to Au and Ag in plasmonic applications owing to their stability at high operational temperatures. However, investigation of the reproducibility of the optical properties after thermal cycling between room and elevated temperatures is so far lacking. Here, thin films of W, Mo, Ti, TiN, TiON, Ag, Au, SrRuO3 and SrNbO3 are investigated to assess their viability for robust refractory plasmonic applications. These results are further compared to the performance of SrMoO3 reported in literature. Films ranging in thickness from 50 to 105 nm are deposited on MgO, SrTiO3 and Si substrates by e-beam evaporation, RF magnetron sputtering and pulsed laser deposition, prior to characterisation by means of AFM, XRD, spectroscopic ellipsometry, and DC resistivity. Measurements are conducted before and after annealing in air at temperatures ranging from 300 to 1000° C for one hour, to establish the maximum cycling temperature and potential longevity at elevated temperatures for each material. It is found that SrRuO3 retains metallic behaviour after annealing at 800° C, while SrNbO3 undergoes a phase transition resulting in a loss of metallic behaviour after annealing at 400° C. Importantly, the optical properties of TiN and TiON are degraded as a result of oxidation and show a loss of metallic behaviour after annealing at 500° C, while the same is not observed in Au until annealing at 600° C. Nevertheless, both TiN and TiON may be better suited than Au or SRO for high temperature applications operating under vacuum conditions.
AU - Wells,M
AU - Bower,R
AU - Kilmurray,B
AU - Zou,B
AU - Mihai,AP
AU - GOBALAKRICHENANE,G
AU - Alford,NM
AU - Oulton,RFM
AU - Cohen,L
AU - Maier,SA
AU - ZAYATS,A
AU - Petrov,PK
DO - 10.1364/OE.26.015726
EP - 15744
PY - 2018///
SN - 1094-4087
SP - 15726
TI - Temperature stability of thin film refractory plasmonic materials
T2 - Optics Express
UR - http://dx.doi.org/10.1364/OE.26.015726
UR - http://hdl.handle.net/10044/1/59865
VL - 12
ER -