‘Thousand Micro-Emitters’ Basic Technology Project: Papers July 2004- Sept. 2006

Refereed Journal Papers  

• C.W. Jeon, E. Gu, C. Liu, J.M. Girkin and M.D. Dawson, “Polymer micro-lens arrays for integration with AlInGaN ultraviolet light-emitting diodes”, IEEE Photon. Technol. Lett., 17, 1887 (2005).

• C.W. Jeon, E. Gu, and M.D. Dawson, “Mask-less photolithographic exposure using a matrix-addressable ultraviolet micro-pixel AlInGaN light-emitting diode”, Appl. Phys. Lett., 86, 221105 (2005).

• G. Heliotis, P.N. Stavrinou, D.D.C. Bradley, E. Gu, C. Griffin, C.W. Jeon, and M.D. Dawson, “Spectral conversion of InGaN ultraviolet microarray light-emitting diodes using fluorine-based red, green, blue and white light emitting polymer overlays films”, Appl. Phys. Lett., 87, 103505 (2005).

• G. Heliotis, G. Itskos, R. Murray, M.D. Dawson, I.M. Watson, and D.D.C. Bradley, “Hybrid inorganic/organic semiconductor heterostructures with efficient non-radiative energy transfer”, Advanced Materials, 18, 334 (2006).

• G. Heliotis, E. Gu, C. Griffin, C.W. Jeon, P.N. Stavrinou, M.D. Dawson, and D.D.C. Bradley, “Wavelength-tunable and white light emission from polymer-converted micropixellated InGaN ultraviolet light-emitting diodes”, J. Opt. A: Pure Appl. Opt., 8, S445 (2006).

• H.X. Zhang, E. Gu, C.W. Jeon, Z. Gong, M.D. Dawson, M.A.A. Neil, and P.M.W. French, “Microstripe-array InGaN light emitting diodes with individually-addressable elements”, IEEE Photon. Technol. Lett., 18, 1681 (2006).

• G. Itskos, G. Heliotis, P.G. Lagoudakis, J. Lupton, I.M. Watson, M.D. Dawson, J. Feldmann, R. Murray, and D.D.C. Bradley, “Efficient resonant dipole-dipole coupling between Mott-Wannier and Frenkel excitons in polyfluorene films near single InGaN/GaN quantum wells”, submitted to Phys. Rev. Lett.

• G. Itskos, G. Heliotis, C. Belton, I.M. Watson, M.D. Dawson, D.D.C. Bradley, and R. Murray, “Efficient Förster transfer mediated by excitons in InGaN/GaN quantum well/polyfluorene heterostructures”, Proceedings of International Conference on the Physics of Semiconductors.

• V. Poher, G.T. Kennedy, D.S. Elson, P.M.W. French, M.A.A. Neil, H.X. Zhang, E. Gu, Z. Gong, C. Griffin, J.M. Girkin, and M.D. Dawson, “Structured illumination microscopy using micro-pixellated light-emitting diodes”, PHOTON’06 On-Line Proceedings.

• E. Gu, A. MackIntosh, A. Kuhne, R.A. Pethrick, C. Belton, D.D.C. Bradley, H.X. Zhang, H.D. Sun, and M.D. Dawson, “Hybrid inorganic/organic micro-structured light-emitting diodes produced by self-aligned direct writing”, submitted to Appl. Phys. Lett.

• T. Wang, G. Raviprakesh, F. Ranalli, C.N. Harrison, J. Bai, J.P.R. David, P.J. Parbrook, J.P. Ao, and Y. Ohno, “Effect of strain relaxation and exciton localisation on performance of 350nm AlInGaN quaternary light-emitting diodes”, J. Appl. Phys., 97, 083104 (2005).

• J. Bai, T. Wang, P.J. Parbrook, K.B. Lee, and A.G. Cullis, “A study of dislocations in AlN and GaN films grown on sapphire substrates”, J. Crystal Growth, 282, 290 (2005).

• T. Wang, J. Bai, P.J. Parbrook, and A.G. Cullis, “Air-bridged lateral growth of an Al 0.98 Ga 0.02N layer by introduction of porosity in an AlN buffer”, Appl. Phys. Lett., 87, 151906 (2005).

• J. Bai, T. Wang, P. Coming, P.J. Parbrook, J.P.R. David, and A.G. Cullis, “Optical properties of AlGaN/GaN multiple quantum well structure by using a high temperature AlN buffer on a sapphire substrate”, J. Appl. Phys., 99, 023513 (2006).

• J. Bai, T. Wang, P.J. Parbrook, I.M. Ross, and A.G. Cullis, “V-shaped pits formed at the GaN/AlN interface”, 289, 63 (2006).

• T. Wang, K.B. Lee, J. Bai, P.J. Parbrook, R.J. Airey, Q. Wang, G. Hill, F. Ranalli, and A.G. Cullis, “Greatly improved performance of 340nm light emitting diodes using a very thin GaN interlayer on a high temperature AlN buffer layer”, Appl. Phys. Lett., 89, (2006).

• J.S. Liu, A.J. Caley, and M.R. Taghizadeh, “Diffractive optical elements for beam shaping of monochromatic spatially incoherent light”, Appl. Opt., in press.

• J.S. Liu, A.J. Caley, and M.R. Taghizadeh, “Symmetrical iterative Fourier-transform algorithm for the design of diffractive optical elements for highly precise laser beam shaping”, J. Modern Optics, 53, 461 (2006).

• A.J. Caley and M.R. Taghizadeh, “Diffractive optics and micro-optics (DOMO): analysis of the effects of bias phase and wavelength choice on the design of dual-wavelength diffractive optical elements”, J. Opt. Soc. Am.A, 23, 193-198 (2006).

• D. Weiland, M. Luetzelschwab, and M.P.Y. Desmulliez, “Two-dimensional monomode fibre array manufacture using UV-LIGA process”, Electron. Lett., 41, 978 (2005).

• M. Leutzelschwab, D. Weiland, and M.P.Y. Desmulliez, “Submicron alignment of a two-dimensional array of multiple single-mode fibers”, IEEE Photon. Technol. Lett., 17, 2634 (2005).

• D. Weiland, M. Luetzelschwab, and M.P.Y. Desmulliez, “Two-dimensional monomode optical fibre array manufacture using microengineering techniques”, Microsystem Technologies, 12, 965 (2006).

Conference presentations

• C. Griffin, E. Gu, H.W. Choi, C.W. Jeon, O.J. Rolinski, D.J.S. Birch, J.M. Girkin, and M.D. Dawson, “Fluorescence excitation and lifetime measurements using GaN/InGaN micro-LED arrays”, Paper ThS3, 17 th Annual Meeting of IEEE/LEOS (Puerto Rico, 7-11 Nov 2004).

• E. Gu, C.W. Jeon, and M.D. Dawson, “Mask-less photolithography using matrix-addressable micro-pixellated ultraviolet LEDs with integrated micro-lenses”, Paper #2012, Symposium J, E-MRS (Strasbourg 2005).

• E. Gu, G. Heliotis, C. Griffin, C.W. Jeon, P.N. Stavrinou, D.D.C. Bradley, and M.D. Dawson, “Full visible and white light emission from polymer-converted UV micro-LED arrays”, 6 th International Conference on Nitride Semiconductors, ICNS-6 (Bremen, August 2005).

• C.W. Jeon, E. Gu, B. Guilhabert, and M.D. Dawson, “Matrix-addressable 370nm micro-LED arrays with integrated polymer micro-lenses”, 6 th International Conference on Nitride Semiconductors, ICNS-6 ( Bremen, August 2005).

• G. Heliotis, E. Gu, C. Griffin, C.W. Jeon, P.N. Stavrinou, M.D. Dawson, and D.D.C. Bradley, “Full-colour and white light emission from hybrid organic/inorganic semiconductor devices”, European Optical Society Topical Meeting on Optical Microsystems (Capri, September 2005).

• B. Guilhabert, E. Gu, A. MackIntosh, R.A. Pethrick, C.L. Lee, M. Campoy-Quiles, G. Heliotis, D.D.C. Bradley, and M.D. Dawson, “Micro-optics in UV transparent polymer for deep UV LED applications”, 6 th International Symposium on Blue Laser and Light Emitting diodes (Montpellier, May 2006).

• H.X. Zhang, E. Gu, C.W. Jeon, Z. Gong, and M.D. Dawson, “Fabrication and performance of individually addressable GaN-based micro-stripe LED devices”, 6 th International Symposium on Blue Laser and Light Emitting diodes (Montpellier, May 2006).

• I.M. Watson, G. Heliotis, G. Itskos, P.G. Lagoudakis, J. Feldmann, R. Murray, D.D.C. Bradley, and M.D. Dawson, “Non-radiative energy transfer in hybrid structures combining InGaN single QWs and light-emitting polymers”, 6 th International Symposium on Blue Laser and Light Emitting diodes (Montpellier, May 2006).

• G. Itskos, G. Heliotis, P.G. Lagoudakis, J. Feldmann, M.D. Dawson, I.M. Watson, D.D.C. Bradley, and R. Murray, “Non-radiative energy transfer from an inorganic quantum well to a polymer overlayer”, International Conference on the Physics of Semiconductors (Vienna, July 2006).

• B. Guilhabert, E. Gu, M. Wu, G. Heliotis, C. Belton, P.N. Stavrinou, D.D.C. Bradley, and M.D. Dawson, “Patterning and integration of OLED polyfluorene polymers on matrix addressable UV AlInGaN micropixellated light-emitting diodes”, Optics and Photonics 2006 (Manchester, September 2006).

• V. Poher, G.T. Kennedy, D.S. Elson, P.M.W. French, M.A.A. Neil, H.X. Zhang, E. Gu, Z. Gong, C. Griffin, J.M. Girkin, and M.D. Dawson, “Structured illumination microscopy using light-emitting diodes”, Optics and Photonics 2006 (Manchester, September 2006).

• G. Heliotis, G. Itskos, P.G. Lagoudakis, C. Belton, M.D. Dawson, I.M. Watson, J. Feldmann, R. Murray, and D.D.C. Bradley, “Efficient Förster coupling between inorganic and organic excitons”, International Conference on Synthetic Materials (Dublin, July 2006).

• C. Belton, P.N. Stavrinou, R. Xia, G. Heliotis, and D.D.C. Bradley, “Sub-wavelength structures for polymer lasers”, International Conference on Synthetic Materials ( Dublin, July 2006).

• E. Gu, A. MackIntosh, A. Kuhne, R.A. Pethrick, C. Belton, D.D.C. Bradley, and M.D. Dawson, “Hybrid inorganic/organic microstructured LEDs produced by self-aligned direct writing”, Paper F-O-2, UK Compound Semiconductors 2006 (Sheffield, July 2006).

• Z. Gong, H.X. Zhang, E. Gu, and M.D. Dawson, “Micro-pixellated InGaN LED arrays with improved emission uniformity”, Paper F-P-6, UK Compound Semiconductors 2006 (Sheffield, July 2006).

• Z. Gong, H.X. Zhang, E. Gu, and M.D. Dawson, “Uniform emission from matrix-addressable micro-pixellated InGaN light-emitting diodes”, Paper MC2, 19 th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Montreal, Canada, October 2006).

• E. Gu, A. MackIntosh, A. Kuhne, R.A. Pethrick, C. Belton, D.D.C. Bradley, and M.D. Dawson, “Hybrid inorganic/organic microstructured LEDs produced by self-aligned direct writing”, Paper TuC5, 19 th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Montreal, Canada, October 2006).

• D.D.C. Bradley, “Fluorene-based polymer gain media”, Keynote Lecture, International Conference on Synthetic Materials ( Dublin, July 2006).

• D.D.C. Bradley, “Conjugated polymer nanophotonics”, Nanotechnology in Northern Europe Congress 2006 ( Helsinki, May 2006).

• D.D.C. Bradley, “Molecular nanoengineering of conjugated polymer function”, Royal Society Discussion Meeting on Supramolecular Nanotechnology for Organic Electronics ( London, June 2006).

• T. Wang, J. Bai, P.J. Parbrook, and A.G. Cullis, “MOCVD-growth of an Al 0.98 Ga 0.02N layer with significant dislocation reduction by a porous AlN buffer”, 6 th International Conference on Nitride Semiconductors, ICNS-6 ( Bremen, August 2005).

• P.J. Parbrook, T. Wang, J. Bai, and A.G. Cullis, “Greatly improved quantum efficiency of AlGaN/GaN multiple quantum wells using AlN buffers on a sapphire substrate”, 6 th International Conference on Nitride Semiconductors, ICNS-6 ( Bremen, August 2005).

• J. Bai, T. Wang, P.J. Parbrook, and A.G. Cullis, “A microstructural study on the GaN growth on thick AlN buffer layer”, Proc. Annual Conference of British Association of Crystal Growth (Sheffield 2005).

• F. Ranalli, P.J. Parbrook, T. Wang, J. Bai, K.B. Lee, and A.G. Cullis, ”Improved AlN based buffer layer technologoes for UV-LEDs”, 6 th International Symposium on Blue Laser and Light Emitting diodes (Montpellier, May 2006).

• J.S. Liu, A.J. Waddie, M.R. Taghizadeh, E. Gu, and M.D. Dawson, “Diffractive optical elements for beam shaping of monochromatic spatially incoherent light”, European Optical Society Annual Meeting (Paris, October 2006).

• J.S. Liu, J. Thomson, and M.R. Taghizadeh, “Symmetrical iterative Fourier-transform using both phase and amplitude freedom for the design of diffractive beam shaping elements”, CLEO-Europe (Munich 2005).

• H. Suyal, A.J. Waddie, M.R. Taghizadeh, A. Kuhne, A.R. MackIntosh, R.A. Pethrick, C. Belton, D.D.C. Bradley, E. Gu, and M.D. Dawson, “Direct laser-writing of light-emitting polymer (LEP) based polymer system”, European Optical Society Annual Meeting (Paris, October 2006).

• A.J. Caley, A.J. Waddie, and M.R. Taghizadeh, “Investigating the effect of wavelength and bias phase on the design of diffractive optical elements for 2-colour far-field pattern formation”, CLEO-Europe (Munich 2005).

• D.S. Elson, V. Poher, C. Dunsby, J. Requejo-Isidro, P.M.W. French, and M.A.A. Neil, “Video rate fluorescence lifetime imaging and structured illumination using a blue LED”, Focus on Microscopy ( Jena, March 2005).

• V. Poher, D.S. Elson, P.M.P. Lanigan, C. Dunsby, P.M.W. French, and M.A.A. Neil, “Shot noise in wide-field structured illumination microscopy: an intrinsic limitation for quantitative measurements?”, Focus on Microscopy 2005 (Jena, March 2005).

• J. McGinty, V. Poher, D.S. Elson, I. Munro, J. Requejo-Isidro, N.P. Galletly, M.J. Lever, M.A.A. Neil, G.W.H. Stamp, and P.M.W. French, “Development of a fluorescence lifetime instrument for biomedical imaging including excitation with an LED”, Hereaus Workshop on Optical Imaging of Brain Function (Bad Honnef, November 2005).

• D.S. Elson, V. Poher, J. Hares, P.M.W. French, and M.A.A. Neil, “Fluorescence lifetime imaging (FLIM) in the time and frequency domains using a low cost LED”, Biological Imaging and Microscopy, Photonex 2005 (Coventry, October 2005).

• G.T. Kennedy, D.S. Elson, I. Munro, V. Poher, P.M.W. French,, and M.A.A. Neil, “Fluorescence lifetime imaging using light-emitting diodes”, Optics and Photonics 2006 (Manchester, September 2006).

• D. Graham, D. Robson, T. Price, W.E. Smith, M.D. Dawson, C. Griffin, and J.M. Girkin, “Blue LED arrays and functionalised nanoparticles for biosensing”, European Optical Society Annual Meeting (Paris, October 2006).

• D. Weiland, M.P.Y. Desmulliez, and M. Luetzelschwab, “Monomode fibre array manufacture using microengineering techniques”, IMAPS Microtech 2005 ( Cambridge UK, March 2005).

• D. Weiland, M.P.Y. Desmulliez, and M. Luetzelschwab, “Two-dimensional optical fibre array manufacture using microengineering techniques”, DTIP of MEMS and MOEMS (Montreux, 2005).

• D. Weiland, A.C.M. Missoffe, M. Luetzelschwab, M.P.Y. Desmulliez, and C. Beck, “Low-cost active alignment of single-mode fibre arrays”, International Symposium on Electronics Materials and Packaging ( Tokyo, 2005).

• D. Weiland, A.C.M. Missoffe, M. Luetzelschwab, M.P.Y. Desmulliez, and C. Beck, “Manufacture of two-dimensional monomode optical fiber array using MEMS technology”, 7 th Electronics Packaging Technology Conference (Singapore, 2005).

Patents:

M.A.A. Neil and P.M.W. French, “Slit-scanning microscopy and endoscopy using a micro-LED array”, applied for March 2006.

A. MackIntosh, R.A. Pethrick, E. Gu, and M.D. Dawson, “Novel polymeric material with enhanced UV transparency”, applied for October 2006.