08fd412b6c0ee39d88aa3e4ff16a56e8 pmc_34064520.pdf a383a1538cd83f3fb2f64ec1bbeaa8324683e349 pmc_34064520.pdf 66bce26061b1a3668234ba775c5811509b4862f0fc15afdc73f980d90a1187ef pmc_34064520.pdf Title: An Inverted Honeycomb Plasmonic Lattice as an Efficient Refractive Index Sensor Subject: We present an efficient refractive index sensor consisting of a heterostructure that contains an Au inverted honeycomb lattice as a main sensing element. Our design aims at maximizing the out-of-plane near-field distributions of the collective modes of the lattice mapping the sensor surroundings. These modes are further enhanced by a patterned SiO2 layer with the same inverted honeycomb lattice, an SiO2 spacer, and an Au mirror underneath the Au sensing layer that contribute to achieving a high performance. The optical response of the heterostructure was studied by numerical simulation. The results corresponding to one of the collective modes showed high sensitivity values ranging from 99 to 395 nm/RIU for relatively thin layers of test materials within 50 and 200 nm. In addition, the figure of merit of the sensor detecting slight changes of the refractive index of a water medium at a fixed wavelength was as high as 199 RIU-1. As an experimental proof of concept, the heterostructure was manufactured by a simple method based on electron beam lithography and the measured optical response reproduces the simulations. This work paves the way for improving both the sensitivity of plasmonic sensors and the signal of some enhanced surface spectroscopies. Keywords: Au plasmonic nanostructures; inverted honeycomb lattice; surface lattice resonances; refractive index sensor Author: Javier Rodríguez-Álvarez, Lorenzo Gnoatto, Marc Martínez-Castells, Albert Guerrero, Xavier Borrisé, Arantxa Fraile Rodríguez, Xavier Batlle and Amílcar Labarta Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Sat May 8 03:40:57 2021 CEST ModDate: Sat May 8 03:45:22 2021 CEST Custom Metadata: no Metadata Stream: no Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 12 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 2218124 bytes Optimized: no PDF version: 1.7 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- JDNLRQ+VnURWPalladioL Type 1 Custom yes yes no 10 0 ELVEWG+URWPalladioL-Ital Type 1 Custom yes yes no 15 0 XSFPGH+URWPalladioL-Bold Type 1 Custom yes yes no 20 0 OUNVTZ+URWPalladioL-Roma Type 1 Custom yes yes no 24 0 DAEYKC+CMSY10 Type 1 Builtin yes yes no 28 0 ULTSPI+VnURWPalladioL-Bold Type 1 Custom yes yes no 32 0 NPLVPL+TimesNewRomanPS-BoldItalicMT Type 1C WinAnsi yes yes no 40 0 MCBCCI+SourceSansRoman-Regular Type 1C Custom yes yes no 62 0 MCBCCM+SourceSansRoman.613wght Type 1C Custom yes yes no 66 0 MCBCCO+SourceSansRoman-Bold Type 1C Custom yes yes no 70 0 PCNHGF+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 85 0 PCNHGH+PalatinoLinotype TrueType WinAnsi yes yes no 88 0 PCNHHJ+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 91 0 OVNEXW+EURM10 Type 1 Builtin yes yes no 98 0 FKPFBV+PazoMath-Italic Type 1 Builtin yes yes no 105 0 JHYTSG+CMR10 Type 1 Builtin yes yes no 109 0 PCNHGF+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 118 0 PCNHGH+PalatinoLinotype TrueType WinAnsi yes yes no 121 0 PCNHHJ+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 124 0 PCNJHN+CambriaMath CID TrueType Identity-H yes yes yes 127 0 PCNHGF+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 140 0 PCNHGH+PalatinoLinotype TrueType WinAnsi yes yes no 143 0 PCNHHJ+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 146 0 PCNJHN+CambriaMath CID TrueType Identity-H yes yes yes 149 0 PCNHGF+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 169 0 PCNHGH+PalatinoLinotype TrueType WinAnsi yes yes no 172 0 PCNHHJ+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 175 0 PCNJHN+CambriaMath CID TrueType Identity-H yes yes yes 178 0 PCNHGF+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 193 0 PCNHGH+PalatinoLinotype TrueType WinAnsi yes yes no 196 0 PCNHHJ+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 199 0 PCNJHN+CambriaMath CID TrueType Identity-H yes yes yes 202 0 PCNHGF+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 218 0 PCNHGG+PalatinoLinotype CID TrueType Identity-H yes yes yes 221 0 PCNHGH+PalatinoLinotype TrueType WinAnsi yes yes no 227 0 PCNHHJ+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 230 0 PCNJHN+CambriaMath CID TrueType Identity-H yes yes yes 233 0 PCNHGF+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 246 0 PCNHGH+PalatinoLinotype TrueType WinAnsi yes yes no 249 0 PCNHHJ+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 252 0 Jhove (Rel. 1.28.0, 2023-05-18) Date: 2024-10-02 03:16:07 CEST RepresentationInformation: pmc_34064520.pdf ReportingModule: PDF-hul, Rel. 1.12.4 (2023-03-16) LastModified: 2023-03-31 12:13:59 CEST Size: 2218124 Format: PDF Version: 1.7 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 396 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Outlines: Item: Title: Introduction Destination: section.1 Item: Title: Materials and Methods Destination: section.2 Item: Title: Results Destination: section.3 Children: Item: Title: Optical Response of the Heterostructure Destination: subsection.3.1 Item: Title: Performance of the Refractive Index Sensor Destination: subsection.3.2 Item: Title: Experimental Realization of the Heterostructure Destination: subsection.3.3 Item: Title: Discussion Destination: section.4 Item: Title: References Destination: section.4 Info: Title: An Inverted Honeycomb Plasmonic Lattice as an Efficient Refractive Index Sensor Author: Javier Rodríguez-Álvarez, Lorenzo Gnoatto, Marc Martínez-Castells, Albert Guerrero, Xavier Borrisé, Arantxa Fraile Rodríguez, Xavier Batlle and Amílcar Labarta Subject: We present an efficient refractive index sensor consisting of a heterostructure that contains an Au inverted honeycomb lattice as a main sensing element. Our design aims at maximizing the out-of-plane near-field distributions of the collective modes of the lattice mapping the sensor surroundings. These modes are further enhanced by a patterned SiO2 layer with the same inverted honeycomb lattice, an SiO2 spacer, and an Au mirror underneath the Au sensing layer that contribute to achieving a high performance. The optical response of the heterostructure was studied by numerical simulation. The results corresponding to one of the collective modes showed high sensitivity values ranging from 99 to 395 nm/RIU for relatively thin layers of test materials within 50 and 200 nm. In addition, the figure of merit of the sensor detecting slight changes of the refractive index of a water medium at a fixed wavelength was as high as 199 RIU-1. As an experimental proof of concept, the heterostructure was manufactured by a simple method based on electron beam lithography and the measured optical response reproduces the simulations. This work paves the way for improving both the sensitivity of plasmonic sensors and the signal of some enhanced surface spectroscopies. Keywords: Au plasmonic nanostructures; inverted honeycomb lattice; surface lattice resonances; refractive index sensor Creator: LaTeX with hyperref Producer: pdfTeX-1.40.21 CreationDate: Sat May 08 03:40:57 CEST 2021 ModDate: Sat May 08 03:45:22 CEST 2021 ID: 0x4f7ffadd4b150ed96be6ea3f13b04585, 0x4f7ffadd4b150ed96be6ea3f13b04585 Filters: FilterPipeline: FlateDecode Fonts: Type1: Font: BaseFont: ULTSPI+VnURWPalladioL-Bold FontSubset: true FirstChar: 129 LastChar: 189 FontDescriptor: FontName: ULTSPI+VnURWPalladioL-Bold Flags: Symbolic FontBBox: -152, -301, 1000, 935 FontFile: true EncodingDictionary: Differences: true Font: BaseFont: OVNEXW+EURM10 FontSubset: true FirstChar: 22 LastChar: 22 FontDescriptor: FontName: OVNEXW+EURM10 Flags: Symbolic FontBBox: -32, -243, 1060, 720 FontFile: true Font: BaseFont: XSFPGH+URWPalladioL-Bold FontSubset: true FirstChar: 2 LastChar: 122 FontDescriptor: FontName: XSFPGH+URWPalladioL-Bold Flags: Symbolic FontBBox: -152, -301, 1000, 935 FontFile: true 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