2022

  1. C. Corbella Bagot, E. Rappeport, T. Ba Tis and W. Park, “FRET-based pH-Sensing with Upconverting Nanoparticles”, Photonics West, Jan. 22 - 27, 2022.

2021

  1. Bo Xu, B. M. Heffernan, K. Bae, M. Siemens, J. T. Gopinath and W. Park, “Group Theory Guided Symmetry Coupling between Cylindrical Vector Beams and Localized Surface Plasmon Resonances”, Conference on Laser and Electro-Optics (CLEO), May 9 - 14, 2021.
  2. B. M. Heffernan, Bo Xu, K. Bae, M. Siemens, W. Park and J. T. Gopinath, “Tailoring the Multipolar Content at Tight Focus Using Cylindrical Vector Beams with Orbital Angular Momentum”, Conference on Laser and Electro-Optics (CLEO), May 9 - 14, 2021.

2020

  1. (Invited) A. Das, K. Bae and W. Park, "Plasmon Enhanced Upconversion in Water-Dispersible Nanostructures", SPIE Optics + Photonics, Aug. 24-28, 2020.
  2. K. Bae, A. Das, B. Xu and W. Park, "A spectroscopic study on the interaction between upconversion nanoparticles and plasmonic nanostructure", SPIE Optics + Photonics, Aug. 24-28, 2020.
  3. E. Rappeport, C. C. Bagot, A. Das, T. Ba Tis, and W. Park, "Utilizing Upconverting Nanoparticles as Optical pH Sensors", SPIE Optics + Photonics, Aug. 24-28, 2020.
  4. K. Bae, T. M. Horning, S. Pampel, M. Zohrabi, M. B. Grayson, J. T. Gopinath and W. Park, “On-chip high-quality Ge23Sb7S70 round-wedge resonators for broadband dispersion engineering”, Conference on Laser and Electro-Optics (CLEO), May 11 - 15, 2020.
  5. M. Grayson, M. Zhorabi, K. Bae, J. Zhu, J. T. Gopinath and W. Park, “Enhancement of Third-Order Nonlinearity of Thermally Evaporated GeSbSe Waveguides Through Annealing”, SPIE Photonics West, San Francisco, CA, Feb 1-6, 2020.

2019

  1. (Invited) W. Park, “Nanophotonic enhancement of luminescence upconversion for cancer detection and therapy”, SPIE Optics + Photonics, San Diego, CA, Aug. 11-15, 2019.
  2. J. Zhu, K. Bae, M. Zohrabi, T. M. Horning, M. B. Grayson, W. Park, and J. T. Gopinath, “In-situ, nonlinear characterization of microresonators”, OSA Nonlinear Optics Topical Meeting, Hawaii, USA, Jul. 15-19, 2019.
  3. J. Zhu, M. Zohrabi, T. M. Horning, W. Park, and J. T. Gopinath, “Photosensitive writing and erasing of gratings in an As2Se3 chalcogenide microresonator”, OSA Nonlinear Optics Topical Meeting, Hawaii, USA, Jul. 15-19, 2019.
  4. K. Bae, J. Zhu, M. B. Grayson, M. Zohrabi, C. Wolenski, T. M. Horning, J. T. Gopinath and W. Park, “High quality factor, nonlinear indium tin oxide nanoparticle-coated silica microsphere”, OSA Nonlinear Optics Topical Meeting, Hawaii, USA, Jul. 15-19, 2019.
  5. A. Das, C. Wolenski, and W. Park, “Direct measurements of optical nonlinearity in indium tin oxide nanoparticles”, OSA Nonlinear Optics Topical Meeting, Hawaii, USA, Jul. 15-19, 2019.
  6. (Invited) W. Park, “Self-Assembled Plasmon-Upconversion Nanoclusters for Cancer Theranostics”, The 10th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Lisbon, Portugal, Jul. 23-26, 2019.
  7. (Invited) W. Park, “Plasmon enhanced luminescence upconversion”, The 10th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Lisbon, Portugal, Jul. 23-26, 2019.
  8. (Invited) W. Park, “Photonic Enhancement and Biomedical Application of Luminescence Upconversion”, Optics and Photonics Congress 2019, Busan, Korea, Jul. 14-16, 2019.

2018

  1. W. Park, S. K. Cho, C. Mao, L.-J. Su, T. W. Flaig, “Self-assembled nanoclusters for detection and optoporation-aided chemotherapy of bladder cancer”, International Conference on Self-Assembly of Colloidal Systems, Bordeaux, France, Sep. 20-22, 2018.
  2. (Invited) W. Park, “Theory and Applications of Plasmon Enhanced Luminescence Upconversion”, The 19th International Symposium on the Physics of Semiconductors and Applications, Jeju, Korea, Jul. 1-4, 2018.
  3. A. Das, C. Mao, S. Cho and W. Park, “Plasmon enhanced upconversion in water-dispersible metal-insulator-metal nanostructures”, CLEO Laser Science to Photonic Applications, May 5-10, 2018.
  4. S. K. Cho, L.-J. Su, T. W. Flaig, and W. Park, “Multifunctional nanocluster composed of gold nanorod and upconversion nanoparticle for simultaneous imaging and treatment”, SPIE Photonics West, San Francisco, CA, Jan. 27 - Feb. 1, 2018.

2017

  1. (Invited) W. Park, “Plasmon enhanced upconversion for biomedical applications”, The 18th US-Korea Conference on Science, Technology and Entrepreneurship, Washington, DC, Aug. 9-12, 2017.
  2. (Best Paper Award) G. Kang, C. Mao, S. K. Cho, and W. Park, “Plasmon Enhanced Upconversion Luminescence in the Metal-Insulator-Metal Cylindrical Nanostrucutres”, Materials Research Society Spring Meeting, Phoenix, AZ, Apr. 17 - 21, 2017.
  3. S. K. Cho, and W. Park, “Synthesis and characterization of upconverting, transparent, and conducting indium tin oxide nanoparticles doped rare-earth ions”, Materials Research Society Spring Meeting, Phoenix, AZ, Apr. 17 - 21, 2017.
  4. G. Kang, S. K. Cho, M. R. Krogstad, J. T. Gopinath, and W. Park, “Design and fabrication of high-Q chalcogenide glass micro-disk resonators”, SPIE Photonics West, San Francisco, CA, Jan. 28 - Feb. 2, 2017.

2016

  1. W. Park, “Plasmon enhanced upconversion for applications in solar energy harvesting”, SPIE Optics + Photonics, San Diego, CA, Aug. 28 - Sep. 1, 2016.
  2. S. K. Cho, L.-J. Su, T. W. Flaig and W. Park, “Gold nanorods coupled with NaYF4:Yb3+,Er3+ upconverting nanophosphors for targeted thermal ablation and imaging of HTB9 bladder cancer cells”, SPIE Optics + Photonics, San Diego, CA, Aug. 28 - Sep. 1, 2016.
  3. (Invited) W. Park, “Plasmon enhanced luminescence upconversion”, The 5th International Conference on Smart and Multifunctional Materials, Structures and Systems, Perugia, Italy, Jun. 5-9, 2016.
  4. M. Krogstad, S. Ahn, W. Park and J. Gopinath, “Linear and Nonlinear Optical Properties of Ge-Sb-Se Waveguides at Telecom Wavelengths”, CLEO 2016 Laser Science to Photonic Applications, San Jose, CA, Jun. 5-10, 2016.
  5. (Invited) W. Park, “Plasmon Enhanced Luminescence Upconversion in Self-Assembled Nanostructures”, The 7th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Malaga, Spain, Jul. 25-28, 2016.
  6. W. Park, “Plasmon enhanced upconversion for applications in solar energy harvesting”, SPIE Optics + Photonics, San Diego, CA, Aug. 28 - Sep. 1, 2016.
  7. S. K. Cho, L.-J. Su, T. W. Flaig and W. Park, “Gold nanorods coupled with NaYF4:Yb3+,Er3+ upconverting nanophosphors for targeted thermal ablation and imaging of HTB9 bladder cancer cells”, SPIE Optics + Photonics, San Diego, CA, Aug. 28 - Sep. 1, 2016.

2015

  1. S. K. Cho, S. Ahn, W. Park, L.-J. Su and T. W. Flaig, “A new and efficient surface modification of NaYF4:Yb3+,Er3+ upconversion phosphor nanoparticles for biomedical imaging and organic photovoltaic applications”, 249th American Chemical Society National Meeting & Exposition, Denver, CO, Mar. 22-26, 2015.
  2. M. Krogstad, S. Ahn, W. Park and J. Gopinath, “Characterization of Ge28Sb12Se60 Waveguides”, CLEO 2015 Laser Science to Photonic Applications, San Jose, CA, May 10-15, 2015.
  3. (Invited) W. Zhang and W. Park, “Cage template synthesis and cage directed assembly of gold nanoparticles”, The 6th International Conference on Metamaterials, Photonic Crystals and Plasmonics, New York, Aug. 4-7, 2015.
  4. D. Lu, C. Mao, S. Ahn, S. K. Cho and W. Park, “Transient spectroscopic study of upconversion energy transfer processes coupled with Plasmonic field”, The 6th International Conference on Metamaterials, Photonic Crystals and Plasmonics, New York, Aug. 4-7, 2015.
  5. C. Mao, L. He, J. Cha and W. Park, “Plasmon enhanced luminescence upconversion in Au and NaYF4:Yb3+,Er3+ nanoparticle clusters”, SPIE Optics + Photonics, San Diego, CA, Aug. 9-13, 2015.
  6. S. Ahn and W. Park, “Surface plasmon enhanced infrared absorption in P3HT-based organic solar cells: the effect of infrared sensitizer”, SPIE Optics + Photonics, San Diego, CA, Aug. 9-13, 2015.
  7. D. Lu, W. Park and P. Brady, “Metamaterial Enhanced Rectenna for Efficient Energy Harvesting”, American Vacuum Society 62nd International Symposium and Exhibition, San Jose, CA, Oct. 18-23, 2015.
  8. (Keynote) W. Park, “Photonic Nanostructures for Energy Applications”, International Conference on Advanced Engineering, Busan, Korea, Oct. 22-24, 2015.
  9. (Invited) W. Park, “Plasmonic nanostructures for organic photovoltaic devices”, The 9th International Conference on Advanced Materials and Devices, Jeju, Korea, Dec. 7-9, 2015.

2014

  1. (Invited) W. Park, “Plasmonic Nanostructures and Applications”, The 17th International Symposium on the Physics of Semiconductors and Applications, Jeju, Korea, Dec. 7-11, 2014.
  2. (Invited) W. Park, “Plasmonic Nanostructures for Organic Photovoltaic Devices”, Optical Nanostructures and Advanced Materials for Photovoltaics, Canberra, Australia, Dec. 2-5, 2014.
  3. (Invited) W. Park, “Optical interactions in plasmonic nanostructures”, International Symposium on Electro-Optics and Nonlinear Optics, Harbin, China, Sep. 2-4, 2014.
  4. (Invited) W. Park, “Plasmonic Structures for Organic Photovoltaic Devices”, SPIE Optics + Photonics, San Diego, CA, Aug. 17-21, 2014.
  5. D. Lu, S. Cho, S. Ahn, L. Brun, C. J. Summers and W. Park, “Mechanism of plasmon enhanced upconversion processes in NaYF4:Yb3+,Er3+ nanoparticles”, SPIE Optics + Photonics, San Diego, CA, Aug. 17-21, 2014.
  6. S. Cho, L.-J. Su, X. Yang, T. W. Flaig and W. Park, “Gold nanorods coupled with upconversion phosphors for simultaneous bladder cancer detection and treatment”, SPIE Optics + Photonics, San Diego, CA, Aug. 17-21, 2014.
  7. D. Rourke, S. Ahn, A. Nardes, J. van de Lagemaat, N. Kopidakis and W. Park, “Comprehensive Device Modeling of Plasmon-Enhanced and Optical Field-Dependent Photocurrent Generation in Organic Bulk Heterojunctions”, The 40th IEEE Photovoltaic Specialists Conference, Denver, CO, Jun. 8 - 13, 2014.
  8. S. Ahn, D. Rourke, A. Nardes, J. van de Lagemaat, N. Kopidakis and W. Park, “Surface Plasmon Enhanced Infrared Absorption in the Sensitized Polymer Solar Cell”, The 40th IEEE Photovoltaic Specialists Conference, Denver, CO, Jun. 8 - 13, 2014.
  9. (Invited) W. Park, “Self-Assembly Based on Molecular Cages”, The 5th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Singapore, May 20 - 23, 2014.

2013

  1. D. Rourke, S. Ahn, J. van de Lagemaat, N. Kopidakis, A. Nardes and W. Park, “Combined Optical and Electrical Modeling of Plasmon-Enhanced Organic Photovoltaic Devices”, Optical Nanostructures and Advanced Materials for Photovoltaics, Tucson, AZ, Nov. 3 - 6, 2013.
  2. C. J. Summers, H. Menkara, L. Brun, L. Freud, C. Schneller, D. Lu, S. Cho, W. Park, “Optimized Synthesis and Plasmonic Enhancement of Upconversion NaYF4:Yb(20%),Er(2%) Phosphors”, The 19th International Vacuum Congress, Paris, France, Sep. 9 - 13, 2013.
  3. D. Lu, Y. Cui, S. Cho, L. Brun, C. J. Summers and W. Park, “Surface Plasmon Enhanced Luminescence Up-Conversion”, CLEO 2013 Laser Science to Photonic Applications, San Jose, CA, Jun. 10 - 14, 2013.
  4. D. Lu, E. Rengnath, Y. Cui, and W. Park, “Interaction of two plasmon modes in the organic photovoltaic devices with patterned back-electrode”, CLEO 2013 Laser Science to Photonic Applications, San Jose, CA, Jun. 10 - 14, 2013.
  5. M. R. Krogstad, E. Rengnath, W. Park, and J. T. Gopinath, “Third-Order Nonlinearities of Ge28Sb12Se60 for Waveguide Devices”, CLEO 2013 Laser Science to Photonic Applications, San Jose, CA, Jun. 10 - 14, 2013.
  6. (Invited) V. A. Tamma, Y. Cui, J. Zhou and W. Park, “Manipulation of Light Scattering by Plasmonic Nanocomposite Structures”, The 4th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Sharjah, United Arab Emirates, Mar. 18 - 22, 2013.

2012 and earlier

  1. (Invited) W. Park, “Optical metamaterial thin films by nanoparticle self-assembly”, SPIE Optics + Photonics, San Diego, CA, Aug. 12-16, 2012.
  2. V. A. Tamma, Y. Cui, J. Zhou and W. Park, “Tunable Resonance in Flexible Plasmonic Nanostructures”, CLEO 2012 Laser Science to Photonic Applications, San Jose, CA, May 6 - 11, 2012.
  3. (Invited) W. Park, “Scalable Metamaterial by Self-Assembly”, The 3rd International Conference on Metamaterials, Photonic Crystals and Plasmonics, Paris, France, Apr. 19 - 22, 2012.
  4. (Invited) W. Park, “Manipulating light scattering with plasmonic nanostructures”, Asia Communications and Photonics Conference, Guangzhou, China, Nov. 7-10, 2012.
  5. (Invited) Y. Cui, J. Zhou, V. A. Tamma and W. Park, “Dynamic Tuning and Symmetry Lowering of Fano Resonance in Plasmonic Nanostructure”, The 3rd International Conference on Metamaterials, Photonic Crystals and Plasmonics, Paris, France, Apr. 19 - 22, 2012.
  6. W. Park, E. Rengnath, D. Lu, X. Yu, J.-S. Lemaire, Z. Li and C. J. Summers, “Surface Plasmon Enhanced Luminescence Up-Conversion”, The 3rd International Conference on Metamaterials, Photonic Crystals and Plasmonics, Paris, France, Apr. 19 - 22, 2012.
  7. V. A. Tamma, Y. Cui, J. Zhou and W. Park, “Tunable Resonance in Flexible Plasmonic Nanostructures”, CLEO 2012 Laser Science to Photonic Applications, San Jose, CA, May 6 - 11, 2012.
  8. (Invited) W. Park, “Optical metamaterial thin films by nanoparticle self-assembly”, SPIE Optics + Photonics, San Diego, CA, Aug. 12-16, 2012.
  9. (Invited) W. Park, “Manipulating light scattering with plasmonic nanostructures”, Asia Communications and Photonics Conference, Guangzhou, China, Nov. 7-10, 2012.
  10. Y. Cui, V. A. Tamma, and W. Park, “Mechanical Tuning of Surface Plasmon in Flexible Gold Nanograting”, 2011 Conference on Lasers and Electro-Optics and Quantum Electronics Laser Science Conference, Baltimore, MD, May 1-6, 2011.
  11. X. Yu, N. Azarova, S. Joshi and W. Park, “Plasmonic Nanostructures for Organic Photovoltaic Devices”, 2011 Conference on Lasers and Electro-Optics and Quantum Electronics Laser Science Conference, Baltimore, MD, May 1-6, 2011.
  12. N. Azarova, X. Yu and W. Park, “Light Trapping by Plasmonic Nanostructures in Organic Solar Cells”, The 5th International Conference on Surface Plasmon Photonics, Busan, Korea, May 15-20, 2011.
  13. (Invited) W. Park, “Plasmonic Nanostructures for Photovoltaic Applications”, The 10th Mediterranean Workshop and Topical Meeting on Novel Optical Materials and Applications, Cetraro, Italy, Jun. 5-11, 2011.
  14. M. Mohamed, Z. Li, E. Dudley, X. Chen, L. Shang, W. Park, and A. Mickelson, “Adiabatic Couplers for Linear Power Division”, OSA Topical Meeting on Integrated Photonics Research, Silicon and Nano Photonics, Toronto, Canada, Jun 12-15, 2011.
  15. X. Chen, D. Espinoza, E. Dudley, Z. Li, M. Mohamed, Y. Cui, W. Park, L. Shang and A. Mickelson, “Polymer-Clad Silicon on Insulator Slot Modulator”, OSA Topical Meeting on Integrated Photonics Research, Silicon and Nano Photonics, Toronto, Canada, Jun 12-15, 2011.
  16. V. A. Tamma, T.-E. Wang, J. Zhou, C. L. Holloway, E. F. Kuester and W. Park, “Metamaterial Inspired Electrically Small Patch Antenna”, 2011 IEEE International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting, Spokane, WA, Jul. 3-8, 2011.
  17. K. Emoto, T. Martin, A. Seifpour, A. Jayaraman and W. Park, “Nanoparticle Self-Assembly by Copolymer Ligands”, Materials Research Society Workshop on Directed Self-Assembly of Materials, Nashville, TN, Sep. 28 - Oct. 1, 2011.
  18. K. Emoto, Y. Jin, W. Zhang and W. Park, “Cage Molecule Mediated Self-Assembly of Plasmonic Metamaterials”, Materials Research Society Workshop on Directed Self-Assembly of Materials, Nashville, TN, Sep. 28 - Oct. 1, 2011.
  19. W. Park, Y. Cui, V. A. Tamma and J.-B. Lee, “Mechanically Tunable Negative Index Photonic Crystal Lens”, OSA Topical Meeting on Nanophotonics, Tsukuba, Japan, May 30 - Jun. 3, 2010.
  20. V. A. Tamma, J. Blair, C. J. Summers and W. Park, “All-Dielectric Near-Infrared Ground Plane Cloak”, OSA Topical Meeting on Photonic Metamaterials and Plasmonics, Tucson, AZ, Jun. 7-8, 2010.
  21. V. A. Tamma, S. Joshi, and W. Park, “Optical Frequency Negative-Index Material Based On Silver Nanocluster Metamaterial”, OSA Topical Meeting on Photonic Metamaterials and Plasmonics, Tucson, AZ, Jun. 7-8, 2010.
  22. C. J. Summers, H. Menkara, and W. Park, “Nanocrystalline Phosphors for Lighting and Detection Applications”, The 7th Pacific Rim International Conference on Advanced Materials and Processing (PRICM 7), Cairns, Australia, Aug. 2-6, 2010.
  23. Y. Cui, V. A. Tamma, J.-B. Lee and W. Park, “Mechanically Tunable Negative Index Photonic Crystal Lens”, SPIE Optics + Photonics, San Diego, CA, Aug. 1-5, 2010.
  24. (Invited) W. Park, R. Pratibha and I. I. Smalyukh, “Tunable Metamaterial Based on Liquid Crystal Gold Nanoparticle Composite”, SPIE Optics + Photonics, San Diego, CA, Aug. 1-5, 2010.
  25. J. Blair, V. A. Tamma, W. Park, and C. J. Summers, “Dielectric optical invisibility cloak”, SPIE Optics + Photonics, San Diego, CA, Aug. 1-5, 2010.
  26. M. Hoerner, X. Yu, V. A. Tamma and W. Park, “Plasmonic Nanostructures for Organic Photovoltaic Devices”, LCOPV 2010 Workshop on Directing Nanoscale Organization in Organic Photovoltaics: Liquid Crystal for Energy, Boulder, CO, Aug. 7-10, 2010.
  27. W. Park, V. A. Tamma, J. Blair and C. J. Summers, “Dispersion Characteristics of All-Dielectric Optical Frequency Cloak Based on Silicon Nanorods”, The Ninth International Symposium on Photonic and Electromagnetic Crystal Structures, Granada, Spain, Sep. 26-30, 2010.
  28. (Invited) W. Park, “Light trapping nanostructures for organic solar cells”, CNL/NNIN Symposium on Nanotechnology and Energy, Boulder, CO, Oct. 25-26, 2010.
  29. (Invited) W. Park, “Nanocluster Metamaterial”, Progress In Electromagnetics Research Symposium, Beijing, China, Mar. 23-27, 2009.
  30. V. A. Tamma, J. H. Lee, Q. Wu and W. Park, “Self-Assembled Metal Nanocluster Metamaterials”, 2009 Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference, Baltimore, MD, May 31 – Jun 5, 2009.
  31. (Invited) W. Park, “Metal Nanocluster Metamaterials”, The 9th Mediterranean Workshop and Topical Meeting on Novel Optical Materials and Applications, Cetraro, Italy, Jun. 7-13, 2009.
  32. Y. H. Cui, Q. Wu, W. Park, J. Jeon, M. J. Kim, and J.-B. Lee, “MEMS-based mechanically tunable flexible photonic crystal”, The 15th International Conference on Sensors, Actuators and Microsystems (Transducers 2009), Denver, CO, Jun. 21-25, 2009.
  33. V. A. Tamma, J. Blair, J. H. Lee, Q. Wu, S. J. Rhee, C. J. Summers and W. Park, “Near-Infrared Ground Plane Cloak Based on Silicon Nanorod Array”, Frontiers in Optics 2009: The Optical Society of America Annual Meeting, San Jose, CA, Oct. 11-15, 2009.
  34. Q. Wu, J.-H. Lee, J. Ahn and W. Park, “Metal Nanocluster Metamaterial”, 2008 Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference, San Jose, CA, May 4-9, 2008.
  35. J. Ahn, W. Park, L. Bemis and W. A. Robinson, “Recognition of double-stranded DNA by gold nanoprobes for malignant melanoma detection”, 2008 Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference, San Jose, CA, May 4-9, 2008.
  36. J.-H. Lee, J. Xue, Q. Wu, W. Park and A. Mickelson, “ Active Polymer-Based Surface Plasmon-Polariton Waveguides”, 10th International Conference on Organic Nonlinear Optics, Santa Fe, NM, May 18-23, 2008.
  37. J.-H. Lee, Q. Wu, J. Xue, W. Park and A. Mickelson, “Active Plasmonics”, 2008 IEEE AP-S & USNC/URSI Symposium, San Diego, CA, Jul. 5-12, 2008.
  38. J.-H. Lee and W. Park, “Three-Dimensional Metal Dielectric Photonic Crystal Based on Self-Assembled Gold Nanoshells”, SPIE Optics + Photonics, San Diego, CA, Aug. 10-14, 2008.
  39. W. Park, J.-H. Lee, J. Xue, Q. Wu and A. Mickelson, “Polymer-Based Active Plasmonic Devices”, 236th American Chemical Society National Meeting & Exposition, Philadelphia, PA, August 17-21, 2008.
  40. J.-H. Lee, Q. Wu and W. Park, “Magnetic Resonance in Near Infrared Region of Gold Nanoparticle Cluster Metamaterial”, OSA Topical Meeting on Plasmonics and Metamaterials Optics, Rochester, NY, Oct. 20-23, 2008.