Tuesday, 3 May 2011 - CLEO

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Room 339 Room 340 Room 341 CLEO: Science & Innovations 16:00–17:45 CTuY • Organic Emitters and Absorbers Kristjan Leosson, Univ. of Iceland, Iceland, Presider 16:00–17:45 CTuZ • Optofluidic Photonic Structures and Devices Anders Kristensen, Technical Univ. of Denmark, Denmark, Presider 16:00–17:45 CTuAA • Nanostructured Materials and Devices Peter Kazansky, Univ. of Southampton, UK, Presider CTuY1 • 16:00 Invited Melt-grown molecular mono-crystals: morphology, optical properties, role of the substrate, Silvia Tavazzi 1 , Stefano Mora 1 , Peter Spearman 1 ; 1 Materials Science Department, Univ. of Milano Bicocca, Italy. Molecular mono-crystals can be grown and integrated in devices from the melted compound. The role of the substrate and the resulting morphology, crystallinity, optical anisotropy and properties are discussed. CTuZ1 • 16:00 Porous Polymer Waveguides and Ring Resonators, Matthew Mancuso 1 , Julie Goddard 2 , David Erickson 3 ; 1 Department of Biomedical Engineering, Cornell Univ., USA; 2 Department of Food Science, Univ. of Massachusetts Amherst, USA; 3 Sibley School of Mechanical and Aerospace Engineering, Cornell Univ., USA. Nanoporous polymer ring resonators are capable of detecting biomolecular interactions within their pores. These interactions between the core energy and biomolecules lead to increased sensitivity when compared to traditional ring resonators. CTuAA1 • 16:00 Femtosecond Laser-Assisted Etching of Three Dimensional Woodpile Micro-Channel Arrays in Fused Silica, Stephen Ho 1 , Moez Haque 1 , Peter R. Herman 1 , J. Stewart Aitchison 1 ; 1 Edward S. Rogers Sr. Department of Electrical and Computer Engineering and the Inst. for Optical Sciences, Univ. of Toronto, Canada. A three-dimensional invertedwoodpile micro-channel array was fabricated in bulk fused silica with femtosecond laser and HF etching. An exposure compensation algorithm provided uniform periodic woodpile structure defining a novel micro-channel. CTuZ2 • 16:15 Tunable Single Mode Lasing from an On-chip Optofluidic Ring Resonator Laser, Wonsuk Lee 1,2 , Hao Li 1,3 , Jonathan D. Suter 1 , Karthik Reddy 1,2 , Yuze Sun 1 , Xudong Fan 1 ; 1 Biomedical Engineering, Univ. of Michigan, USA; 2 Electrical Engineering and Computer Science, Univ. of Michigan, USA; 3 Optical Science and Engineering, Fudan Univ., China. We demonstrate single mode lasing from coupled OFRRs via the Vernier effect with a threshold of a few µJ/mm 2 . The single mode operation is stable under high pump densities, and its wavelength can be tuned. CTuAA2 • 16:15 Formation of laser-induced periodic structures in TiO 2 crystals depending on the surface quality, Susanta K. Das 1 , Marcus Rohloff 1 , Andreas Pfuch 2,3 , Wolfgang Seeber 2 , Arkadi Rosenfeld 1 , Ruediger Grunwald 1 ; 1 Max Born Inst. for Nonlinear Optics and Short-Pulse Spectroscopy, Germany; 2 Friedrich-Schiller-Universität Jena, Germany; 3 INNOVENT e.V. Technologieentwicklung Jena,, Germany. The formation of femtosecond laser induced periodic surface structure in TiO 2 crystals significantly depends on surface quality. Higher roughness shifts ripple formation towards lower fluence and lower pulse number and improve structural coherence. CTuY2 • 16:30 Low-threshold lasing in organic semiconductor microcones, Tobias Grossmann 1,2 , Sönke Klinkhammer 3,2 , Mario Hauser 1 , Torsten Beck 1 , Karl Lüll 3 , Dominik Floess 1 , Christoph Vannahme 2,3 , Timo Mappes 2 , Uli Lemmer 3 , Heinz Kalt 1 ; 1 Institut für Angewandte Physik, Karlsruhe Inst. of Technolog, Germany; 2 Inst. for Microstructure Technology, Karlsruhe Inst. of Technology, Germany; 3 Light Technology Inst., Karlsruhe Inst. of Technology, Germany. We report on the fabrication and optical characterization of whispering-gallery microcavity lasers with an organic semiconductor gain layer and laser thresholds as low as 1 nJ per pulse, operating at visible wavelengths. CTuZ3 • 16:30 Plasmonic Mach-Zehnder interferometer on a microfluidic chip for sensitive optical sensing, Yongkang Gao 1 , Qiaoqiang Gan 1 , Xuanhong Cheng 2 , Filbert Bartoli 1 ; 1 Center for Optical Technologies, Electrical and Computer Engineering Department, Lehigh Univ., USA; 2 Materials Science and Engineering Department, Lehigh Univ., USA. We demonstrate a plasmonic Mach-Zehnder interferometer on a microfluidic chip for sensitive optical sensing with an enhanced sensitivity of more than 4200nm/RIU observed with a far-field optical microscope. CTuAA3 • 16:30 Bragg spectral response of femtosecond laser induced nanogratings inside fused silica glass, Jianzhao Li 1 , Moez Haque 1 , Peter R. Herman 1 ; 1 Electrical and Computer Engineering, Univ. of Toronto, Canada. Bragg spectral response of femtosecond laser induced nanogratings has been observed for the first time, offering a convenient, fast and quantitative approach to characterize nanogratings for better understanding of ultrafast laser glass interactions. Tuesday, 3 May CTuY3 • 16:45 Directional Photoluminescence Enhancement in Organic Flexible Microcavities, Luca Frezza 2 , Maddalena Patrini 1 , Marco Liscidini 1 , Davide Comoretto 2 ; 1 of Physics A. Volta, Univ. of Pavia, Italy; 2 Dipartimento di Chimica e Chimica Industriale, Univ. of Genova, Italy. We report on the fabrication and full optical characterization of flexible full plastic 1D photonic crystal cavities. We demonstrate strong directional emission enhancement when the emitting layer is resonantly coupled to the cavity mode. CTuZ4 • 16:45 Plasmonic Nano-Apertures for Lensfree Onchip Sensing, Bahar Khademhosseinieh 1 , Gabriel Biener 1 , Ikbal Sencan 1 , Ting-Wei Su 1 , Ahmet F. Coskun 1 , Aydogan Ozcan 1 ; 1 Electrical Engineering, Univ. of California at Los Angeles, USA. We demonstrate lensfree on-chip sensing within a microfluidic channel using plasmonic nanoapertures illuminated by a partially-coherent source. Our results confirm lensfree sensing of refractive index changes as small as ~0.002 using this modality. CTuAA4 • 16:45 Freezing ultrashort light pulses by excitonpolariton interference in glass, Martynas Beresna 1 , Peter Kazansky 1 , Thomas Taylor 2 , Alexey Kavokin 2 ; 1 Optoelectronics Research Centre, Univ. of Southampton, UK; 2 Physics and Astronomy School, Univ. of Southampton, UK. Nanostructures with sub-wavelength period along polarization and close to wavelength along propagation direction self-assemble in silica glass after femtosecond laser writing. Phenomenon is interpreted in terms of exciton-polariton crystal formation. Concurrent sessions are grouped across four pages. Please review all four pages for complete session information. 115
Room 318-320 Room 321-323 Room 324-326 Room 314 CLEO: QELS- Fundamental Science CLEO: Science & Innovations CLEO: QELS- Fundamental Science QTuL • Exciton and Carrier Dynamics in Nanophotonic Systems—Continued CTuS • Mid-Infrared and Nonlinear Devices—Continued QTuM • Metatronics and Transformation Optics— Continued QTuN • Ultrafast Structural Dynamics and Collective Phenomena—Continued QTuL5 • 17:00 Exciton-photon coupling of InAs quantum dot in GaAs photonic crystal mode-gap nanocavities, Jie Gao 1 , Sylvain Combrié 2 , Baolai Liang 3 , Gaelle Lehoucq 2 , Diana L. Huffaker 3 , Dirk Englund 1 , Alfredo De Rossi 2 , Chee Wei Wong 1 ; 1 Columbia Univ., USA; 2 Thales Research and Technology, France; 3 Univ. of California at Los Angeles, USA. We demonstrate single quantum dot coupled to photonic crystal mode-gap cavities with high Q/V ratio. Polarization and temperature dependent photoluminescence are examined. Predominating polarization is observed for quantum dot coupled to cavity mode. CTuS5 • 17:00 Forming a nonlinear grating in Silicon nanowire waveguides using the intrinsic anisotropic Kerr nonlinearity of Silicon, Jeffrey B. Driscoll 1 , Richard Grote 1 , Xiaoping Liu 1 , Jerry I. Dadap 1 , Nicolae C. Panoiu 2 , Richard M. Osgood 1 ; 1 Microelectronics Sciences Laboratories, Columbia Univ., USA; 2 Department of Electronic and Electrical Engineering, Univ. College London, UK. We present a numerical analysis demonstrating that the anisotropy of the Kerr effect in Silicon can be used to form a nonlinear grating in Silicon waveguides with uniform cross-section. QTuM2 • 17:00 Fabrication of Dielectric Aperiodic Nanostructured Luneburg Lens in Optical Frequencies, Satoshi Takahashi 1 , Chih-Hao Chang 1 , Se-Young Yang 1 , Hyungryul J. Choi 1 , George Barbastathis 1,2 ; 1 Mechanical Engineering, MIT, USA; 2 Singapore- MIT Alliance for Research and Technology (SMART) Centre, Singapore. We have designed and fabricated an all-dielectric subwavelengthpatterned Luneburg lens for operation at freespace wavelength of λ=1.55μm. QTuN5 • 17:00 Coherent Control of Gold Nanoparticles Formation, Paulo Ferreira 1 , Jonathas Siqueira 1 , Lino Misoguti 1 , David Santos Jr. 1 , Cleber Mendonca 1 ; 1 Univ. of Sao Paulo, Brazil. We use pulse-shaping of femtosecond pulses to coherent control the synthesis of gold nanoparticles induced by twophoton absorption. Applying distinct phase masks to the pulse, we were able to shift the plasmon absorption band. QTuL6 • 17:15 Room-temperature, high-efficiency conversion of Mott-Wannier to Frenkel excitons in hybrid semiconductor quantum dot/polymer composites, Sedat Nizamoglu 1 , Xiao Wei Sun 2 , Hilmi Volkan Demir 1,2 ; 1 Bilkent Univ., Turkey; 2 Nanyang Technological Univ., Singapore. Efficient conversion from Mott-Wannier to Frenkel excitons at room temperature is observed in hybrid inorganic/ organic composites of CdSe/ZnS core/shell heteronanocrystals in MDMO-PPV homopolymers at a rate of 0.2628 ns -1 with an efficiency of 80.9%. CTuS6 • 17:15 Ultra-Compact Coupled-Resonator Device for Four-Wave-Mixing Applications, Amir H. Atabaki 1 , Ali Adibi 1 ; 1 Georgia Inst. of Technology, USA. A coupled-resonator device consisting of three compact microresonators is proposed and demonstrated for FWM in silicon. The possibility of tuning of signal and idler wavelengths in this device enables novel reconfigurable nonlinear experiments. QTuM3 • 17:15 Metamaterial Models of Exotic Spacetimes, Igor Smolyaninov 1 , Alexei Smolyaninov 1 ; 1 Univ. of Maryland, USA. We demonstrate that optical space in metamaterials may be engineered to mimic physics of such exotic spacetimes as the warp drive and various five-dimensional spacetimes. QTuN6 • 17:15 Ultrafast, Surface Plasmon Enhanced Strong- Field Photoemission with a Mid-IR OPCPA, Peter Dombi 1 , Peter Racz 1 , Julia Fekete 1 , Alexandre Thai 2 , Stephan Teichmann 2 , Olivier Chalus 2 , Philip K. Bates 2 , Jens Biegert 2,3 ; 1 Research Inst. for Solid- State Physics and Optics, Hungary; 2 ICFO-Institut de Ciències Fotòniques, Spain; 3 ICREA-Institució Catalana de Recerca i Estudis Avançats, Spain. Surface plasmon field enhancement with a fewcycle mid-IR OPCPA achieves tunneling photoemission from a gold surface at low focused laser intensity (~10 9 W/cm 2 ) and electron acceleration to hundreds of eV. Tuesday, 3 May QTuL7 • 17:30 Strong Coupling between Excitons in J aggregates and Waveguide Modes in Thin Polymer Films, Tal Ellenbogen 1 , Paul Steinvurzel 1 , Kenneth B. Crozier 1 ; 1 School of Engineering and Applied Sciences, Harvard Univ., USA. We observe waveguide exciton-polaritons with large room temperature Rabi splittings of 190 meV and 125 meV for TE and TM modes respectively. The experimental results are in good agreement with numerical simulations. CTuS7 • 17:30 Towards an optical frequency comb with mmscale microresonators for distributing atomic standards, Scott B. Papp 1 , Scott A. Diddams 1 ; 1 Time and Frequency Division 688, National Inst. of Standards and Technology, USA. We will discuss progress on the fabrication of optical microresonators for generation of a frequency comb via nonlinear parametric oscillation. With disk-like resonators of quartz we have achieved Q=10 9 . QTuM4 • 17:30 The cosmological redshift inside the transformation-optical analogue of the Robertson- Walker metric, Vincent Ginis 1 , Philippe Tassin 1,2 , Ben Craps 3 , Irina Veretennicoff 1,3 ; 1 Applied Physics and Photonics, Vrije Universiteit Brussel, Belgium; 2 Ames Lab-USDOE, and Department of Physics and Astronomy, Iowa State Univ., USA; 3 Theoretische Natuurkunde and the International Solvay Inst.s, Vrije Universiteit Brussel, Belgium. We apply transformation optics to the Robertson-Walker metric and retrieve an analogue of the cosmological redshift. This linear time-dependent medium perfectly converts the frequency of wavepackets without the creation of sidebands. QTuN7 • 17:30 Measuring the Lifetime of Ultrashort Electronic Coherences with Long Light Pulses: The Fragile Eg State in Sb and Bi, Jingjing Li 1 , Jian Chen 2 , David Reis 2 , Stephen Fahy 3 , Roberto Merlin 1 ; 1 Physics, Univ. of Michigan, USA; 2 SLAC National Accelerator Lab, Stanford PULSE Inst., USA; 3 Physics, Univ. College Cork, Ireland. We use a combination of ultrafast stimulated Raman scattering and continuous wave spontaneous Raman scattering to determine the lifetime of electronic coherences of Eg symmetry in Sb and Bi, which are below 10fs at 293K. NOTES _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________ 116 CLEO: 2011 • 1–6 May 2011
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Tuesday, 3 May 2011 - CLEO

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