Advanced Optical Materials

Cover image for Vol. 1 Issue 12

December 2013

Volume 1, Issue 12

Pages 887–990

  1. Cover Picture

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      Photonic Crystals: Photonic Crystal Nanocavities Containing Plasmonic Nanoparticles Assembled Using a Laser-Printing Technique (Advanced Optical Materials 12/2013) (page 887)

      Jaekwon Do, Khalid N. Sediq, Kieran Deasy, David M. Coles, Jessica Rodríguez-Fernández, Jochen Feldmann and David G. Lidzey

      Version of Record online: 11 DEC 2013 | DOI: 10.1002/adom.201370071

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      Single gold nanoparticles are accurately positioned onto a submicrometer linear three-hole photonic crystal nanocavity by J. Rodríguez-Fernández, J. Feldmann, D. G. Lidzey, and co-workers via an optical printing technique. On page 946, this leads to a significant electromagnetic interaction between the cavity mode and the nanoparticles' localized surface plasmon in the hybrid structure. The versatile and scalable nature of this approach enables the routine construction of new types of photonic devices and sensors. Cover by Christoph Hohmann, Nanosystems Initiative Munich.

  2. Inside Front Cover

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      Conjugated Polymers: Two-Dimensional Array of Photoluminescent Light Sources by Selective Integration of Conjugated Luminescent Polymers into Three-Dimensional Silicon Microstructures (Advanced Optical Materials 12/2013) (page 888)

      Giovanni Polito, Salvatore Surdo, Valentina Robbiano, Giulia Tregnago, Franco Cacialli and Giuseppe Barillaro

      Version of Record online: 11 DEC 2013 | DOI: 10.1002/adom.201370072

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      Scanning electron microscope and fluorescence microscope images of 2D arrays of photoluminescent light sources with characteristic sizes and periods ranging from a few micrometers up to tens of micrometers are shown on page 894. G. Barillaro and co-workers selectively integrate a green-emitting conjugated polymer into 3D silicon microstructures featuring 2D arrays of holes with different sizes, periods, and aspect ratios. Such a synergistic integration of luminescent polymers and silicon microstructures would pave the way towards interesting and new photonics and diagnostics applications.

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      Liquid Crystals: Nano-Localized Heating Source for Photonics and Plasmonics (Advanced Optical Materials 12/2013) (page 992)

      Luciano De Sio, Tiziana Placido, Svetlana Serak, Roberto Comparelli, Michela Tamborra, Nelson Tabiryan, M. Lucia Curri, Roberto Bartolino, Cesare Umeton and Timothy Bunning

      Version of Record online: 11 DEC 2013 | DOI: 10.1002/adom.201370076

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      On page 899, conversion of near infrared radiation into heat, controlled at the nanoscale, is achieved by L. De Sio et al. and detected by exploiting the localized plasmonic resonance (LPR) of gold nanorods (GNRs) trapped in a nearly periodic Grandjean-Cano texture of a thermotropic cholesteric liquid crystal (CLC). The localized heating from the nanosources induces a modification in the alignment of the surrounding CLC medium; this induces a variation of the CLC photonic bandgap and modifies the spectral position of the LPR of GNRs.

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      Masthead: (Advanced Optical Materials 12/2013)

      Version of Record online: 11 DEC 2013 | DOI: 10.1002/adom.201370075

  5. Contents

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  6. Communications

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    1. Two-Dimensional Array of Photoluminescent Light Sources by Selective Integration of Conjugated Luminescent Polymers into Three-Dimensional Silicon Microstructures (pages 894–898)

      Giovanni Polito, Salvatore Surdo, Valentina Robbiano, Giulia Tregnago, Franco Cacialli and Giuseppe Barillaro

      Version of Record online: 4 SEP 2013 | DOI: 10.1002/adom.201300288

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      Two-dimensional arrays of photoluminescent light sources with characteristic sizes and periods ranging from a few micrometers to tens of micrometers are obtained by selective F8BT integration into 3D silicon microstructures featuring 2D arrays of holes with different sizes, periods, and aspect ratios. Such a synergic integration of luminescent polymers and silicon microstructures paves the way for new photonics applications.

    2. Nano-Localized Heating Source for Photonics and Plasmonics (pages 899–904)

      Luciano De Sio, Tiziana Placido, Svetlana Serak, Roberto Comparelli, Michela Tamborra, Nelson Tabiryan, M. Lucia Curri, Roberto Bartolino, Cesare Umeton and Timothy Bunning

      Version of Record online: 25 AUG 2013 | DOI: 10.1002/adom.201300275

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      Gold nanorods embedded in a cholesteric liquid crystal (CLC) enable control of both the “selective reflection” of the CLC and the “plasmonic resonance” of near infrared radiation, thus allowing realization of a bridging between photonics and plasmonics in these materials. These results open up the detection of nanoscale temperature variations, with possible future application in nanomedicine.

    3. Four-Color Metamaterial Absorber THz Spatial Light Modulator (pages 905–909)

      David Shrekenhamer, John Montoya, Sanjay Krishna and Willie J. Padilla

      Version of Record online: 9 OCT 2013 | DOI: 10.1002/adom.201300265

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      A spatial light modulator with multicolor super-pixels composed of arrays of electronically controlled terahertz metamaterial absorbers is demonstrated to have an average modulation depth of 62 percent and a frequency tunability greater than 5 percent. The device created here shows that fundamental light interactions of surfaces can be dynamically electronically controlled and provide a path forward for future designs.

    4. Perfect Broadband Terahertz Antireflection by Deep-Subwavelength, Thin, Lamellar Metallic Gratings (pages 910–914)

      Lu Ding, Qing Yang Steve Wu, Jun Feng Song, Kazunori Serita, Masayoshi Tonouchi and Jing Hua Teng

      Version of Record online: 20 OCT 2013 | DOI: 10.1002/adom.201300321

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      Perfect broadband terahertz antireflection coatings are demonstrated by deep-subwavelength, thin, lamellar metallic gratings both in theory and experiment. Abrupt phase changes introduced by grating to terahertz wave traversing the coated surface can be tuned from 0 to π as a function of grating parameters. At π/2, the impedance difference between two dielectrics is matched and perfect antireflection occurs.

    5. Thermal Tuning of Surface Plasmon Polaritons Using Liquid Crystals (pages 915–920)

      Arif E. Cetin, Alket Mertiri, Min Huang, Shyamsunder Erramilli and Hatice Altug

      Version of Record online: 22 OCT 2013 | DOI: 10.1002/adom.201300303

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      A thermally controlled plasmonic substrate supporting surface plasmon polaritons in contact with a liquid crystal medium is presented. The platform offers a spectral tuning range ∼18.7 nm by controlling the refractive index of the liquid crystal medium within the nematic phase in a temperature range of 18 °C. The abrupt transition between nematic and isotropic phases also enables a spectral tuning as large as 12 nm with only ∼1 °C.

    6. Eliminating Micro-Cavity Effects in White Top-Emitting OLEDs by Ultra-Thin Metallic Top Electrodes (pages 921–925)

      Tobias Schwab, Sylvio Schubert, Lars Müller-Meskamp, Karl Leo and Malte C. Gather

      Version of Record online: 23 OCT 2013 | DOI: 10.1002/adom.201300392

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      The device efficiency and angular color stability of white top-emitting OLEDs is significantly improved by a decrease in thickness of the semitransparent silver cathode. The transmittance increases and the micro-cavity effects are reduced. Inserting a 2 nm gold wetting layer, the silver layer can be reduced to 5 nm achieving higher efficiency and comparable color stability to the bottom-emitting reference.

    7. Mechanism of Photoluminescence from Chemically Derived Graphene Oxide: Role of Chemical Reduction (pages 926–932)

      Zhixing Gan, Shijie Xiong, Xinglong Wu, Tao Xu, Xiaobin Zhu, Xiao Gan, Junhong Guo, Jiancang Shen, Litao Sun and Paul K. Chu

      Version of Record online: 30 OCT 2013 | DOI: 10.1002/adom.201300368

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      A comprehensive picture of the photoluminescence mechanism of various chemically derived graphene oxides is given. In particular, the strong blue emission at about 430 nm is correlated with carbon defect states formed during the reduction of graphene oxide and the enhanced long-wavelength tuning photoluminescence from functionalized reduced graphene oxide with the enhanced sp2 cluster size effect via resonant energy transfer.

    8. 1,7-Bay-Substituted Perylenediimide Derivative with Outstanding Laser Performance (pages 933–938)

      Manuel G. Ramírez, Sara Pla, Pedro G. Boj, José M. Villalvilla, José A. Quintana, María A. Díaz-García, Fernando Fernández-Lázaro and Ángela Sastre-Santos

      Version of Record online: 11 NOV 2013 | DOI: 10.1002/adom.201300301

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      Efficient ASE at wavelengths >620 nm from PS films doped with a bay-substituted perylenediimide (PDI) derivative is reported. The maximum PDI content is around 40 times larger than in prior studies. The ability to introduce large dye amounts into the film without photoluminescence (PL) quenching allows very high PL and ASE efficiencies with low thresholds. A distributed feedback (DFB) laser device using one of the best-performing films is fabricated and characterized.

  7. Frontispiece

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
    6. Contents
    7. Communications
    8. Frontispiece
    9. Full Papers
    1. You have free access to this content
      Surface Plasmon Resonances: Localized Surface Plasmon Resonance-Enhanced Two-Photon Excited Ultraviolet Emission of Au-Decorated ZnO Nanorod Arrays (Advanced Optical Materials 12/2013) (page 939)

      Yi Lin, Chunxiang Xu, Jitao Li, Gangyi Zhu, Xiaoyong Xu, Jun Dai and Baoping Wang

      Version of Record online: 11 DEC 2013 | DOI: 10.1002/adom.201370074

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      The morphology of Au-decorated ZnO nanorods and the two-photon excitation process of this as-prepared composite material are explored by C. X. Xu and co-workers. As demonstrated on page 940, the two-photon excited UV emission of Au-decorated ZnO can be significantly enhanced under an excitation of 520 nm, consistent with the localized surface plasmon resonance (LSPR) peak of Au nanoparticles (NPs). This improvement is attributed to the strong local field enhancement generated by the LSPR of the NPs.

  8. Full Papers

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Back Cover
    5. Masthead
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    9. Full Papers
    1. Localized Surface Plasmon Resonance-Enhanced Two-Photon Excited Ultraviolet Emission of Au-Decorated ZnO Nanorod Arrays (pages 940–945)

      Yi Lin, Chunxiang Xu, Jitao Li, Gangyi Zhu, Xiaoyong Xu, Jun Dai and Baoping Wang

      Version of Record online: 11 SEP 2013 | DOI: 10.1002/adom.201300302

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      Aligned ZnO nanorod arrays and their Au-decorated counterparts are fabricated, and the two-photon excited ultraviolet emissions of these two samples are studied systematically by selecting beams of different wavelengths as the excitation sources. The results show that the UV emission of Au-decorated ZnO can be significantly enhanced under an excitation of 520 nm, which is consistent with the localized surface plasmon resonance peak of Au nanoparticles.

    2. Photonic Crystal Nanocavities Containing Plasmonic Nanoparticles Assembled Using a Laser-Printing Technique (pages 946–951)

      Jaekwon Do, Khalid N. Sediq, Kieran Deasy, David M. Coles, Jessica Rodríguez-Fernández, Jochen Feldmann and David G. Lidzey

      Version of Record online: 13 AUG 2013 | DOI: 10.1002/adom.201300214

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      An optical printing technique to position a 150 nm diameter gold nanoparticle onto a linear three-hole photonic crystal nanocavity is described. The electromagnetic interaction between the nanoparticle and the cavity mode is evidenced, with the field within the cavity dissipated by driving the nanoparticle plasmon. This method opens possibilities for the construction of new photonic devices and sensors.

    3. Abandoned Functionality of Thin-Film Opal Photonic Crystals (pages 952–962)

      Jens Küchenmeister, Christian Wolff, Kurt Busch, Ulf Peschel and Sergei G. Romanov

      Version of Record online: 25 OCT 2013 | DOI: 10.1002/adom.201300311

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      Experimentally and theoretically obtained diffraction, refraction, and cross-polarized transmission spectra of thin-film opals are studied as a function of the azimuth rotation of the plane of incidence. They show 3-fold rotation symmetry, continuous and patchy stop-bands, as well as cross-polarization coupling effects.

    4. Optical Analysis of p-Type Surface Conductivity in Diamond with Slotted Photonic Crystals (pages 963–970)

      Candice Blin, Xavier Checoury, Hugues A. Girard, Céline Gesset, Samuel Saada, Philippe Boucaud and Philippe Bergonzo

      Version of Record online: 11 NOV 2013 | DOI: 10.1002/adom.201300331

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      Chemically induced surface conductivity is optically evidenced on nanocrystalline diamond-based slotted photonic crystals (PhCs). By simply tuning the surface termination of diamond-PhCs, a strong modification of the spectral features demonstrates the high sensitivity to the p-type subsurface conductivity existing in hydrogenated diamond. This leads to a first estimate of the refractive index of this conductive layer as a function of its thickness.

    5. Indefinite Media Based on Wire Array Metamaterials for the THz and Mid-IR (pages 971–977)

      Osama T. Naman, Matthew R. New-Tolley, Richard Lwin, Alessandro Tuniz, A. Hadi Al-Janabi, Inna Karatchevtseva, Simon C. Fleming, Boris T. Kuhlmey and Alexander Argyros

      Version of Record online: 8 NOV 2013 | DOI: 10.1002/adom.201300402

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      Hyperbolic media based on wire array metamaterials are fabricated via fibre-drawing. The media consist of arrays of indium wires embedded in polymer fibres, and the Plateau–Rayleigh instability which can result in fluctuations in wire diameter is addressed. Electric metamaterials with plasma frequencies from the THz through to the edge of mid-IR are demonstrated and characterised.

    6. Multiple and Multipolar Fano Resonances in Plasmonic Nanoring Pentamers (pages 978–983)

      Hailong Liu, Eunice Sok Ping Leong, Zilong Wang, Guangyuan Si, Longjiang Zheng, Yan Jun Liu and Cesare Soci

      Version of Record online: 30 OCT 2013 | DOI: 10.1002/adom.201300393

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      Optical properties of plasmonic nanoring pentamers are experimentally demonstrated. By tuning the width-to-radius aspect ratio of the central nanoring or/and satellite nanorings, multiple Fano resonances are observed in the absorbance optical spectra, which are ascribed to unconventional plasmonic coupling paths among nanorings.

    7. Naturally Assembled Excimers in Xanthenes as Singular and Highly Efficient Laser Dyes in Liquid and Solid Media (pages 984–990)

      Luis Cerdán, Virginia Martínez-Martínez, ,* Inmaculada García-Moreno, Angel Costela, María E. Pérez-Ojeda, Iñigo López Arbeloa, Liangxing Wu and Kevin Burgess

      Version of Record online: 13 NOV 2013 | DOI: 10.1002/adom.201300383

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      A high laser action with broadened tunability covering 80 nm in the red spectral region (590–670nm) is found in rosamine dyes as a consequence of the coexistence of monomers and naturally assembling excimers induced under high optical gain conditions. These laser properties make rosamines excellent candidates for biophotonic and spectroscopic applications, overcoming the main drawbacks exhibited by other long-wavelength (>600 nm) laser dyes.

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