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Honeycomb-lattice plasmonic absorbers at NIR: anomalous high-order resonance
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO.ORCID-id: 0000-0002-0111-9009
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO.ORCID-id: 0000-0002-3368-9786
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik, Optik och Fotonik, OFO.
2013 (Engelska)Ingår i: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 21, nr 18, s. 20873-20879Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We design, fabricate and characterize a plasmonic honeycomb lattice absorber with almost perfect absorption at 1140 nm over a wide incident angle range. This absorber also possesses a narrow-band, angle-and polarization-dependent high-order resonance in the short-wavelength range, with a bandwidth of 19 nm and angle sensitivity of 3 nm per degree. The nature of this high-order absorption band is analyzed through finite-element simulations. We believe it is due to Bragg coupling of the incident light to the backward-propagating surface plasmon polariton through the periodic modulation of the structure. Such fine absorption bands can find applications in plasmonic sensors and spectrally selective thermal emitters.

Ort, förlag, år, upplaga, sidor
2013. Vol. 21, nr 18, s. 20873-20879
Nyckelord [en]
Electromagnetic wave polarization, Honeycomb structures, Surface plasmon resonance
Nationell ämneskategori
Teknik och teknologier
Identifikatorer
URN: urn:nbn:se:kth:diva-132209DOI: 10.1364/OE.21.020873ISI: 000324867100053Scopus ID: 2-s2.0-84884575313OAI: oai:DiVA.org:kth-132209DiVA, id: diva2:659249
Forskningsfinansiär
Stiftelsen för strategisk forskning (SSF)Vetenskapsrådet
Anmärkning

QC 20131024

Tillgänglig från: 2013-10-24 Skapad: 2013-10-24 Senast uppdaterad: 2017-12-06Bibliografiskt granskad
Ingår i avhandling
1. Fabrication and Characterization of Plasmonic Nanophotonic Absorbers and Waveguides
Öppna denna publikation i ny flik eller fönster >>Fabrication and Characterization of Plasmonic Nanophotonic Absorbers and Waveguides
2014 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Plasmonics is a promising field of nanophotonics dealing with light interaction with metallic nanostructures. In such material systems, hybridizationof photons and collective free-electron oscillation can result in sub-wavelength light confinement. The strong light-matter interaction can be harnessed for,among many applications, high-density photonic integration, metamaterial design, enhanced nonlinear optics, sensing etc. In the current thesis work, we focus on experimental fabrication and characterization of planar plasmonic metamaterials and waveguide structures. The samples are fabricated based on the generic electron beam lithography and characterizations are done with our home-made setups. Mastering and refinement of fabrication techniques as well as setting up the characterization tools have constituted as a majorpart of the thesis work. In particular, we experimentally realized a plasmonic absorber based on a 2D honeycomb array of gold nano-disks sitting on top of a reflector through a dielectric spacer. The absorber not only exhibits an absorption peak which is owing to localized surface plasmon resonance and is insensitive to incidence’s angle or polarization, but also possesses an angle- and polarization-sensitive high-order absorption peak with a narrow bandwidth. We also demonstrated that the strong light absorption in such plasmonic absorbers can be utilized to photothermally re-condition the geometry of gold nanoparticles. The nearly perfect absorption capability of our absorbers promises a wide range of potential applications, including thermal emitter, infrared detectors, and sensors etc. We also fabricated a plasmonic strip waveguide in a similar metal-insulator-metal structure. The strip waveguide has a modal confinement slightly exceeding that of the so-called plasmonic slot waveguide. We further thermally annealed the waveguide. It is observed that the propagation loss at 980 nm has been decreased significantly,which can be attributed to the improvement in gold quality after thermal annealing.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2014. s. x, 55
Serie
TRITA-ICT/MAP AVH, ISSN 1653-7610 ; 2014:02
Nyckelord
Nanophotonics, plasmonics, fabrication
Nationell ämneskategori
Nanoteknik
Forskningsämne
SRA - Informations- och kommunikationsteknik
Identifikatorer
urn:nbn:se:kth:diva-140844 (URN)978-91-7501-995-6 (ISBN)
Disputation
2014-02-27, Sal/hall D, Forum, KTH-ICT, Isafjordsgatan 39, Kista, 10:00 (Engelska)
Opponent
Handledare
Forskningsfinansiär
Stiftelsen för strategisk forskning (SSF)
Anmärkning

QC 20140203

Tillgänglig från: 2014-02-03 Skapad: 2014-01-31 Senast uppdaterad: 2014-02-03Bibliografiskt granskad

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Dai, JinYan, Min

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Totalt: 278 träffar
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