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Extremely sharp transmission peak in optically thin aluminum film with hexagonal nanohole arrays

Du, Qing Guo and Ren, Hengjiang and Png, Ching Eng and Wang, Hui-Tian (2018) Extremely sharp transmission peak in optically thin aluminum film with hexagonal nanohole arrays. Journal of Optics, 20 (10). Art. No. 105002. ISSN 2040-8978. doi:10.1088/2040-8986/aae0d6.

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Extraordinary transmission is the most attractive phenomenon, that has been studied in recent decades, for optically thick metal film with nanohole arrays. On the contrary, in optically thin metal film with nanohole arrays, it has been found that the interaction between excited surface plasmon polariton and non-resonant direct propagation light introduces a strong light absorption and causes a suppressed transmission dip. Here, we explore the optical properties of a free standing optically thin aluminum film with a hexagonal large filling ratio nanohole array and find an extremely sharp extra extraordinary transmission peak within the suppressed transmission dip which is originated from the interaction of the excited surface plasmon polariton and the non-resonant directly scattered light. Simulation results show that the nanohole-array-based biosensor that were proposed have an excellent sensitivity, with a figure of merit of 87, beyond that of nanohole-array-based biosensors reported previously for normal incidence.

Item Type:Article
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URLURL TypeDescription
Du, Qing Guo0000-0001-9283-7323
Wang, Hui-Tian0000-0002-2070-3446
Additional Information:© 2018 IOP Publishing Ltd. Received 21 May 2018; Accepted 12 September 2018; Accepted Manuscript online 12 September 2018; Published 24 September 2018.
Issue or Number:10
Record Number:CaltechAUTHORS:20180925-085221390
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Official Citation:Qing Guo Du et al 2018 J. Opt. 20 105002
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89902
Deposited By: Tony Diaz
Deposited On:25 Sep 2018 16:40
Last Modified:16 Nov 2021 00:39

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