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Localized Plasmon Field Effect of Gold Clusters Embedded in Nanoporous Silicon

Wu, Rihan; Mathieu, Thibaut; Storey, Catherine J.; Jin, Qihao ORCID iD icon 1; Collins, Jack; Canham, Leigh T.; Kaplan, Andrey
1 Lichttechnisches Institut (LTI), Karlsruher Institut fĂĽr Technologie (KIT)


Coupling between nanoplasmonics and semiconducting materials can enhance and complement the efficiency of almost all semiconductor technologies. It has been demonstrated that such composites enhance the light coupling to nanowires, increase photocurrent in detectors, enable sub-gap detection, allow DNA detection, and produce large non-linearity. Nevertheless, the tailored fabrication using the conventional methods to produce such composites remains a formidable challenge. This work attempts to resolve that deficiency by deploying the immersion-plating method to spontaneously grown gold clusters inside nano-porous silicon (np-Si). This method allows the fabrication of thin films of np-Si with embedded gold nanoparticles (Au) and creates nanoplasmonic–semiconductor composites, np-Si/Au, with fractional volume between 0.02 and 0.13 of the metallic component. Optical scattering measurements reveal a distinctive, 200 nm broad, localized surface plasmon (LSP) resonance, centered around 700 nm. Linear and non-linear properties, and their time evolution are investigated by optically pumping the LSP resonance and probing the optical response with short wavelength infra-red (2.5 𝜇 m) light. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000130079
Veröffentlicht am 11.11.2021
DOI: 10.1002/adom.202002119
Zitationen: 6
Web of Science
Zitationen: 6
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Lichttechnisches Institut (LTI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 05.05.2021
Sprache Englisch
Identifikator ISSN: 2195-1071, 2195-1071
KITopen-ID: 1000130079
Erschienen in Advanced optical materials
Verlag John Wiley and Sons
Band 9
Heft 9
Seiten Article no: 2002119
Vorab online veröffentlicht am 24.02.2021
Nachgewiesen in Scopus
Web of Science
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