CLEO: QELS-Fundamental Science Tuesday, 11 June

Exhibit Hall 3JOINTJTu4A • POSTER SESSION I: Nanophotonics, Lightwave Communications and Biophotonics Poster Session—ContinuedTuesday, 11 JuneJTu4A.47Thermal Stress in Silica Disk Resonators, TongChen 1 , Hansuek Lee 1 , Kerry J. Vahala 1 ; 1 AppliedPhysics, California Institute of Technology, USA.We investigate how thermal stress impacts silicadisk resonators by comparing measurements witha finite element and an analytical model. Thickeroxide layers and proper control of undercut enableultrahigh optical performance and mechanicalstability.JTu4A.48Chaos-assisted whispering-gallery-mode excitationusing a sub-wavelength optical fiber,Xue-Feng Jiang 1 , Yun-Feng Xiao 1 , Qihuang Gong 1 ;1Department of Physics, Peking University, China.We report experimentally the chaos-assistedexcitation of high-Q whispering-gallery modes ina deformed microcavity by a sub-wavelength fibertaper. This chaos-mediated coupling combines theadvantages of fiber taper and free-space coupling.JTu4A.49Counter-Propagating Whispering-Gallery-Modes of InGaAs/GaAs Microtubes, QiuhangZhong 1 , Zhaobing Tian 1 , M. Hadi TavakoliDastjerdi 1 , Zetian Mi 1 , David V. Plant 1 ; 1 Departmentof Electrical and Computer Engineering,McGill University, Canada. We demonstrate, forthe first time, the counter-propagating whisperinggallery-modesof InGaAs/GaAs microtubes. Westudy the thermo-optic effect in these microtubesand realize optical-optical modulation in bothpropagating and counter-propagating modes.JTu4A.50Design of Adiabatic Connections for Ultra-Low-Loss Waveguides, Tong Chen 1 , Hansuek Lee 1 ,Kerry J. Vahala 1 ; 1 California Institute of Technology,USA. We propose a variational approach to designadiabatic waveguide connections with minimalintermodal coupling. A design of the “S-bend” ofwhispering-gallery spiral waveguides is demonstratedwith approximately 0.05dB insertion loss.JTu4A.51Compact Tunable Directional Couplers in SOI,Piero Orlandi 1,3 , Francesco Morichetti 2 , MichaelJohn Strain 3 , Marc Sorel 3 , Andrea Melloni 2 , PaoloBassi 1 ; 1 Dipartimento di Ingegneria dell’EnergiaElettrica e dell’Informazione, Università di Bologna,Italy; 2 Dipartimento di Elettronica, Informazione eBioingegneria, Politecnico di Milano, Italy; 3 Schoolof Engineering, University of Glasgow, UnitedKingdom. A compact tunable directional coupleris realized on a silicon photonic platform. Thepower splitting ratio can be widely tuned througha transverse temperature gradient induced by anasymmetrically placed integrated heater.JTu4A.52Double-layer silicon waveguides in standardsilicon for 3D photonics, Chia-Ming Chang 1 ,Olav Solgaard 1 ; 1 Stanford University, USA. Wedemonstrate a 3D photonic technology forfabrication of double-layer silicon waveguides instandard silicon. This technology eliminates theneed for silicon-on-insulator (SOI) wafers and canbe further expanded to multiple-layer photonicsfor different applications.JTu4A.53Tailoring of Low Chromatic Dispersion overa Broadband in Silicon Waveguides using aDouble-Slot Design, Changjing Bao 1 , Yan Yan 1 ,Lin Zhang 2 , Yang Yue 1 , Alan E. Willner 1 ; 1 Departmentof Electrical Engineering, University ofSouthern California, USA; 2 Department of MaterialScience and Engineering, Massachusetts Institute ofTechnology, USA. We propose horizontal doubleslotsilicon waveguide to tailor the dispersionand achieve flattened and low dispersion with abandwidth of 878 nm from -17 to 23 ps/km/nm.Supercontinuum in all-normal dispersion with 3dB bandwidth of 188 nm is generated in doubleslotwaveguide.JTu4A.54Characterization of the Fundamental PolarizationModes of a Silicon Waveguide in the FarField, Jian Wang 1 , Justin C. Wirth 1 , Yi Xuan 1 ,Daniel E. Leaird 1 , Andrew M. Weiner 1 , MinghaoQi 1 ; 1 Purdue University, USA. The polarizationcompositions of fundamental quasi-TE andquasi-TM modes of a strip silicon waveguide arecharacterized with free-space polarizers, and theirpolarization extinction ratios depend on the sizesof various apertures in the experimental setups.JTu4A.55Engineering 3D Metal Nanoantenna for FluorescenceEnhancement, Xiang Meng 1 , Richard R.Grote 1 , Richard M. Osgood 1 ; 1 Columbia University,USA. We examine the fluorescence enhancementsfrom various 3D metallic nanoantenna/moleculesstructures with different antenna shapes, metaltypes and spacer-molecule lengths. The resultsallow us to engineer optimal metallic structuresfor the fluorescence enhancement.JTu4A.56Observation of non-specular effects for Gaussian-Schellmodel light beams, Michele Merano 1 ,Gabriele Umbriaco 1 , Giampaolo Mistura 1 ; 1 Universitàdegli Studi di Padova, Italy. We investigateexperimentally the role of spatial coherence onoptical beam shifts. This topic has been the subjectof recent theoretical debate. Our data unambiguouslyresolve the theoretical debate in favour ofone specific theory.JTu4A.57Local Characterization of Photonic Structuresby Near-field Scanning Optical Microscopy andSpectral Interferometry, Johanna Trägårdh 1 ,Henkjan Gersen 1 ; 1 HH Wills physics laboratory,University of Bristol, United Kingdom. We combinea near-field scanning optical microscope (NSOM)with crossed beam spectral interferometry, toenable a full local optical characterization ofphotonic structures.JTu4A.58Synthesis of aluminum nanoparticles for UVplasmonics, Julien Proust 1 , Silvère Schuermans 1 ,Jérôme Martin 1 , Davy Gerard 1 , Thomas Maurer 1 ,Jérôme Plain 1 ; 1 Université de Technologie de Troyes,France. We report on the synthesis and characterizationof Aluminum-based Nano-Particles(AL-NPs). AL-NPs exhibit a very good homogeneityand reproducibility. Extinction spectroscopymeasurements show that Al-NPs present sharplocalized surface plasmon resonances (LSPRs) inthe UV region.JTu4A.59Ultra-Compact Plasmonic Microresonator withEfficient Thermo-Optic Tuning, High QualityFactor and Small Mode Volume, Chao Xiang 1,2 ,Jian Wang 2 , Chun-Kit Chan 1 ; 1 Department ofInformation Engineering, The Chinese University ofHong Kong, Hong Kong; 2 Wuhan National Laboratoryfor Optoelectronics, College of OptoelectronicScience and Engineering,Huazhong Universityof Science & technology, China. We propose anultra-compact plasmonic microresonator withhigh thermo-optic tuning efficiency (~4 nm/100K), high quality factor (~350), and small modevolume (~0.01 μm3). This microresonator haspotential in on-chip components, thermal sensing,and micro/nano-lasing.JTu4A.60Three-dimensional nanoplasmonic surfaceswith strong out-of-plane electric field enhancement,Kivanç Güngör 1 , Emre Ünal 1 , Hilmi VolkanDemir 1,2 ; 1 Department of Electrical and ElectronicsEngineering, Department of Physics, and UNAM -Institute of Materials Science and Nanotechnology,Bilkent University, Turkey; 2 Nanyang TechnologicalUniversity, Singapore. Conventional 2D plasmonicstructures, with surface coverage ~50%, providefield enhancement in the plane. The proposed3D nanoplasmonic surfaces, with unity coverage,achieve 7.2-fold stronger out-of-plane enhancementcompared to the 2D counterparts.JTu4A.61Methodology of Surface Wave Holography forWavefront Shaping of Light, Yu-Hui Chen 1 , LinGan 1 , Jiafang Li 1 , Zhi-Yuan Li 1 ; 1 CAS Institute ofPhysics, China. We discuss a novel methodologycalled surface wave holography, which allowsfor direct determination of the morphology ofplasmonic nanostructrues perforated on a metalthin film for wavefront control and shaping oflight without the need of complicated inverseproblemsolutions.JTu4A.62Complex Polarizability of an Isolated SubwavelengthPlasmonic Hole in a Thin Metal Film,Jun Xu 1 , Nicholas Xuanlai Fang 1 ; 1 MechanicalEngineering, Massachusetts Institute of Technology,USA. In this work, we experimentally measure thenear field intensity distribution of light squeezedthrough a subwavelength plasmonic hole in athin metal film and retrieve both transmissioncoefficient and phase shift information.JTu4A.63Strong suppression of angle and period dependencyof surface-plasmon-polaritons in goldnanodisks by combining a nanorod substrate,Szu-Chi Yang 1 , Pei-Kuen Wei 2 , Ting-Wei Liao 3 ,Meng-Lin Tsai 4 , Pierre-Adrien Mante 1 , Yu-RuHuang 1 , I-Ju Chen 1 , Hui-Yuan Chen 1 , Chi-KuangSun 1,5 ; 1 Department of Electrical Engineering andGraduate Institute of Photonics and Optoelectronics,National Taiwan University, Taiwan; 2 Institute ofPhysics and Research Center for Applied Sciences,Academia Sinica, Taiwan; 3 Department of ElectricalEngineering and Graduate Institute of ElectronicsEngineering, National Taiwan University, Taiwan;4Department of Materials Science and Engineering,National Tsing-Hua University, Taiwan; 5 MolecularImaging Center and Graduate Institute of BiomedicalElectronics and Bioinformatics, National TaiwanUniversity, Taiwan. We report that the angular andperiodic dependence of the surface-plasmonpolaritonsin gold nanodisks can be suppressedby nanorod substrates, which decreases the dipolarcoupling and enhance their localization.JTu4A.64Super absorption in ultra-thin photovoltaicfilms based on strong interference effects, KaiLiu 1 , Haomin Song 1 , Dengxin Ji 1 , Bin Zhou 1 , XieZeng 1 , Qiaoqiang Gan 1 , Alexander Cartwright 1 ;1EE, State University of New York at Buffalo, USA.We computationally and experimentally demonstratea super absorption in a flat ultra-thinorganic photovoltaic layer on metal substratesbased on interference effects of strongly absorptiveultra-thin films.JTu4A.65Properties of InAs Quantum Dots in NanoimprintLithography Patterned GaAs Pits, JuhaTommila 1 , Andreas Schramm 1 , Teemu V. Hakkarainen1 , Esa Heinonen 2 , Mihail Dumitrescu 1 ,Mircea Guina 1 ; 1 Optoelectronics Research Centre,Tampere University of Technology, Finland; 2 Centerof Microscopy and Nanotechnology, University ofOulu, Finland. We report on the structural andoptical properties of InAs quantum dots fabricatedinto nanoimprint lithography patterned GaAspits. The size-dependent properties of single sitecontrolledquantum dots and their integration intooptical microcavities are presented.JTu4A.66Surface-Phonon Polariton Mediated RadiativeTransfer Between Two Dielectric Spheres,Karthik Sasihithlu 1 , Arvind Naryanaswamy 1 ;1Columbia University, USA. Surface phonon polaritonmediated radiative transfer between twospheres of equal radii R and minimum gap d hasbeen shown to scale as R/d as d/R → 0. A modifiedform of the proximity approximation to predictnear-field radiative transfer between two sphereshas also been discussed.JTu4A.67Plasmon-Enhanced Photoluminescence fromMetal Nanostructures, Tigran V. Shahbazyan 1 ;1Physics, Jackson State University, USA. A microscopictheory of plasmon-enhanced metal photoluminescenceis developed. New mechanism ofluminescence suppression in small nanostructuresis identified: excitation of Auger plasmons by coreholes. Our numerical calculations are in excellentagreement with experiment.130CLEO: 2013 • 9–14 June 20132013CLEO Tuesday.indd 395/17/13 3:11 PM