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Dr. Louise Bradley

Associate Professor (Physics)

Dr. Bradley leads a vibrant research team in the field of photonics, with current research interests mainly in the area of nanophotonics. Her research is directly relevant for development of higher efficiency light emitting devices, solar cells and sensing applications. She has previously made significant contributions to the development of novel devices for optical telecommunications systems. In 1992 she received a BSc (First Class Hons.) in Experimental Physics from University College Dublin. She was awarded Forbairt and Trinity College Dublin scholarships to pursue postgraduate studies at Trinity College Dublin, obtaining a MSc in 1994 and a PhD in 1998. During her PhD she studied nonlinear optical processes in semiconductor microcavity systems. As a Postdoctoral Research Fellow she worked on the development of semiconductor microcavity devices for lighting applications. In 1999, she became a Lecturer in the Institute of Technology, Tallaght, before returning to join the academic staff of the School of Physics in 2000. Subsequently, she was appointed Senior Lecturer and elected to Fellowship of the College in 2009. Dr. Bradley has won over 2.55 M€ in competitive funding from Science Foundation Ireland, Enterprise Ireland and the Irish Research Council. She has published over 140 scientific papers and collaborates with national and international research teams.
  CAVITY POLARITONS   Condensed matter, optical and dielectric properties   FABRICATION   Laser technology   NANOSTRUCTURES   Nanotechnology   Nonlinear Dynamics   Optical materials   Optics   PHOTOLUMINESCENCE   Photon Science & Technology   Photonic Networks   Photonics   Physics   QUANTUM-WELL   SEMICONDUCTOR DEVICES AND MATERIALS   SEMICONDUCTOR LASERS   SEMICONDUCTOR NANOCRYSTALS   SEMICONDUCTOR OPTICAL AMPLIFIERS   Semiconductor optoelectronics   SEMICONDUCTOR QUANTUM WELLS   SEMICONDUCTOR-LASERS   SEMICONDUCTORS   SPECTROSCOPIC CHARACTERIZATION   Telecommunications Research
 Pixel Demonstrator for Actively Tuned Reflective Plasmonic Display
 Surface plasmon -semiconductor nanocrystal interactions: toward nanoscale light emitting devices
 Noise Controlled Semiconductor Optical Amplifiers
 Novel ultra-violet optoelectronic devices based on copper halides lattice matched to silicon substrates
 The growth of a wide band gap, direct band gap, optoelectronics material on silicon substrates: CuCl on Si

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External Examiner for 3 Bachelor Degree Programmes in the School of Physics, Dublin City University 2015-2019
Expert reviewer for national funding agencies in 10 countries across 3 continents including the ANR (France), DoE (US), New Zealand Science Foundation, and Austrian Science Foundation 2001-present
Reviewer for many journals including ACS Nano, Scientific Reports, Nanoscale, Physical Review Letters, Advanced Materials, Journals of Physical Chemistry, Applied Physics Letters, Journal of Quantum Electronics, Photonics Technology Letters, Journal of Lightwave Technology
Chair of Nanophotonics and Plasmonics Committee, Photonics Ireland 2011,2013, 2015, 2017
Scientific Advisory Committee, CIMTEC 2016 and 2018 2016 and 2018
External Expert in Photonics and Physics on 13 Appointment Committees 2001 - present
PhD examiner in other third level institutions 2001 - present
Scientific Advisory Committee, EMN Light Matter Interactions 2016 2016
External Academic Assessor for Dublin Institute of Technology B.Sc. in Physics Technology 2011
Academic External Assessor for new degree programme, B.Sc. in Energy and Environmental Physics 2011
Optoelectronics and Photionic Devices Programme Committee Member, SPIE Opto-Ireland 2005 2005
Technical Committee Member, Photonics Ireland, Galway 2007 and 2009
Irish representative at Cost P11: Physics of linear and non-linear photonic crystals 2003-2007
Advisory committee member for the 4th International Conference on Physics of Light-matter Coupling in Nanostrcutures, St. Petersburg, July 2004 2004
Irish Representative at COST 268, Wavelength scale photonics components for telecommunications 2001
Language Skill Reading Skill Writing Skill Speaking
English Fluent Fluent Fluent
French Medium Medium Medium
Details Date From Date To
American Physical Society
Institute of Physics
Luke J. Higgins, Cristian A. Marocico, Jorge Garcia Coindreau, Vasilios D. Karanikolas, Alan P. Bell, John J. Gough, Graham P. Murphy, Peter J. Parbrook and A. Louise Bradley, Influence of plasmonic array geometry on non-radiative energy transfer from a quantum well to a quantum dot layer, 19th International Conference on Transparent Optical Networks (ICTON), Girona, Spain, July, 2017, edited by M. Marciniak , 2017, Conference Paper, PUBLISHED
Jennings, Brian; McCloskey, David; Gough, John; Hoang, Thomas; Abadia, Nicolas; Zhong, Chuan; Karademir, Ertugrul; Bradley, A. L.; Donegan, John, Characterisation of multi-mode propagation in silicon nitride slab waveguides, Journal of Optics, 19, (1), 2017, p015604-, Journal Article, PUBLISHED  DOI
G. P. Murphy, J. J. Gough, L. J. Higgins, V. D. Karanikolas, K. Wilson, J. Garcia Coindreau, Zubialevich, P. J. Parbrook and A. L. Bradley, Ag colloids and arrays for plasmonic non-radiative energy transfer from quantum dots to a quantum well, Nanotechnology, 28, 2017, p115401-, Journal Article, PUBLISHED
F. Zen, V. D. Karanikolas, J. A. Behan, G. Ciapetti, A.L. Bradley and P.E. Colavita, Nanoplasmonic sensing at the carbon-bio interface: study of protein adsorption at graphitic and hydrogenated carbon surfaces, Langmuir, 33, (17), 2017, p4198-4206 , Journal Article, PUBLISHED  DOI
Gough J.J, Siewerska K.E, Mehigan S, Hanlon D, Backes C, Gholamvand Z, Szydloska B.M, Blau W.J, McCabe E, Bradley A.L, Ag nanoparticle decorated graphene oxide: Fluorescence quenching and surface enhanced raman scattering, 2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2016, 2016, 2016, pp121 - 123, Notes: [Export Date: 27 January 2017], Conference Paper, PUBLISHED  DOI  URL
K. Wilson, C. A. Marocico, E. Pedreuza, C. Smith and A. L. Bradley, Hybrid metal nanostructure arrays for colour printing, 18th International Conference on Transparent Optical Networks (ICTON), Trento, Italy, July, 2016, 2016, Conference Paper, PUBLISHED  DOI
Higgins L.J, Zhang X, Marocico C.A, Murphy G.P, Karanikolas V.K, Gun'Ko Y.K, Lesnyak V, Gaponik N, Susha A.S, Rogach A.L, Parbrook P.J, Bradley A.L, Enhancing Forster nonradiative energy transfer via plasmon interaction, Proceedings of SPIE - The International Society for Optical Engineering, Photonics Europe 2016, Belgium, 2016, 9884, 2016, 98840P -, Notes: [Export Date: 28 February 2017], Conference Paper, PUBLISHED  DOI  URL
Graham P. Murphy, Xia Zhang, and A. Louise Bradley, Temperature-Dependent Luminescent Decay Properties of CdTe Quantum Dot Monolayers: Impact of Concentration on Carrier Trapping, J. Phys. Chem. C, 120, (46), 2016, p26490-26497 , Journal Article, PUBLISHED  DOI
Vasilios D. Karanikolas, Cristian A. Marocico, Paul R. Eastham, A. Louise Bradley, Near-field relaxation of a quantum emitter to 2D semiconductors: surface dissipation and exciton polaritons, Physical Review B, 94, 2016, p195418-, Journal Article, PUBLISHED  DOI
Luke J. Higgins, Cristian A. Marocico, Vasilios D. Karanikolas, Alan P. Bell, John J. Gough, Graham P. Murphy, Peter J. Parbrook and A. Louise Bradley, Influence of plasmonic array geometry on energy transfer from a quantum well to a quantum dot layer, Nanoscale, 8, 2016, p18170-18179 , Journal Article, PUBLISHED  DOI

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L. J.Higgins, C. A. Marocico, J. G. Coindreau, V. D. Karanikolas, A. P. Bell, J. J. Gough, G. P. Murphy, P. J. Parbrook, A. L. Bradley, Influence of plasmonic array in non-radiative energy transfer from a quantum well to a quantum dot layer, ICTON 2017, Girona, Spain, 2017, Invited Talk, PUBLISHED
L. J. Higgins, C. A. Marocico, J. G. Coindreau, V. D. Karanikolas, A.P. Bell, J. J. Gough, G. P. Murphy, P. J. Parbrook, A. L. Bradley, Enhancing Forster nonradiative energy transfer via plasmonic interaction, 12th International Conference on Optics at Surfaces and Interfaces (OSI-12), Dublin, 2017, Invited Talk, PUBLISHED
A. L. Bradley, Importance of diversity in Physics, Women in STEM, Trinity College Dublin, 2017, TCDSU and Wiser, Invited Talk, PUBLISHED
L. J. Higgins, C. A. Marocico, J. C. Garcia, V. D. Karanikolas, A. P. Bell, J. J. Gough, G. P. Murphy, P. J. Parbrook, A. L. Bradley, Enhancing Forster non-radiative energy transfer via plasmon interaction, TCD Physoc, Physics, Trinity College Dublin, March, 2017, 2017, TCD Physics Society, Invited Talk, PUBLISHED
K. Siewerska, J. J. Gough, S. Mehigan, D. hanlon, C. Backes, Z. Gholamvand, B. M Szydloska, W. J. Blau, E. McCabe, A. L. Bradley , Influence of graphene oxide/Ag nanoparticle composites on the fluorescence properies of organic dyes, EMRS Fall 2016, Warsaw, Poland, 2016, Invited Talk, PUBLISHED
L. J.Higgins, C. A. Marocico, J. G. Coindreau, V. D. Karanikolas, A. P. Bell, J. J. Gough, G. P. Murphy, P. J. Parbrook, A. L. Bradley, Enhancing Forster nonradiative energy transfer via plasmon interaction, Photonics Europe 2016, Brussels, Belgium, April 2016, 2016, SPIE, Invited Talk, PUBLISHED
K. Wilson, E. Pedreuza, A. L. Bradley, Hybrid metal nanostructures for colour printing, ICTON 2016, Trento, Italy, July 2016, 2016, Invited Talk, PUBLISHED
X. Zhang, G. P. Murphy and A. L. Bradley, Enhanced resonance energy transfer via plasmonic structures, 2nd International symposium on nanoparticle-nanomaterials and applications, Lisbon, Portugal, January, 2016, 2016, Invited Talk, PUBLISHED
L. J. Higgins, C. A. Marocico, J. G. Coindreau, V. D. Karanikolas, A. P. Bell, J. J. Gough, G. P. Murphy, P. J. Parbrook, A. L. Bradley, Plasmonic arrays for enhanced non-radiative energy transfer in quantum well-quantum dot structures, Nano-Tek 2015, San Antonio, Texas, November, 2015, Invited Talk, PUBLISHED
L. J. Higgins, V. D. Karanikolas, G. P. Murphy, X. Zhang, C. A. Marocico, P. J. Parbrook, A. L. Bradley, Plasmon-enhanced nonradiative energy transfer in a hybrid quantum well structure, ICTON 2015, Budapest, Hungary, July, 2015, 2015, Invited Talk, PUBLISHED


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Award Date
Fellow of Trinity College Dublin 2009
Basic Forbairt Research Award for Fundamental Physics 1992
Trinity College Dublin Postgraduate Scholarship 1992
Nominated for Excellence in Teaching Award 2013
Nominated for Favourite Women in Trinity Science - Dublin University General Science Society 2017
Selected for highlight in the SPIE 2017 Women in Optics Planner 2017
My current research interests include nanophotonics and plasmonics for novel functionality and enhanced performance of photonic devices. A key direction of my research is investigation of near-field energy transfer in semiconductor systems. Of fundamental importance for energy transport and control of interactions between quantum emitters on the nanoscale, this process has far-reaching consequences for sensing, optical computing, light emitting devices and light harvesting applications. My research over the past few years has concentrated plasmonic coupled systems, including enhanced non-radiative energy transfer and emission. My group was the first to report experimental plasmonic enhancement of energy transfer between quantum dots. Subsequently, I published a number of papers demonstrating the role of different parameters in controlling the energy transfer signatures. Most recently, my group has demonstrated that plasmon-enhanced energy transfer can be applied in hybrid material systems which are technologically of great interest, We have reported on plasmon enhanced energy transfer between InGaN quantum wells and quantum dots which can be used for improved light emission and light-harvesting devices. My group is also currently investigating plasmon coupled chiral systems, QD- 2D (MoS2) materials and plasmon-graphene structures. Leading groups in state of the art colloidal QD and plasmonic nanocrystals (Gaponik (TU Dresden), Rogach (City University, Hong Kong and Gun'ko (Chemistry, TCD)), have provided materials for my research over many years. Other collaborators include Prof. Parbrook from the Tyndall Institute, Cork who is an expert in the growth of GaN materials. Tailored plasmonic structures are fabricated using focused-ion beam, e-beam lithography and helium-ion lithography. Interaction with nanoscale metallic features can result in modified emission properties, in terms of intensity, directionality and polarization. Plasmonic structures can facilitate improved performance and enhanced functionality for many applications including, but not limited to, light emitting devices, light harvesting, sensing, quantum optics and all-optical data processing. We have developed a wide range of characterization techniques for the investigation of these nanoscale systems. Over my career I have developed a broad expertise in the field of photonics. My earlier work concentrated on semiconductor microcavity physics and devices. During my PhD I used dynamic non-linear techniques, such as pump-probe and four-wave-mixing, to study the physics of cavity polaritons in semiconductor microcavities. Following on from this work, I investigated how microcavities could be used to enhance non-linear processes, in particular for microcavity-enhanced two-photon absorption based detector. Microcavity structures can also be used to enhance and direct emission. I participated in the EU framework project, AGETHA, with responsibility for the optical design of GaN-based microcavity light emitting devices. I applied my knowledge of pump-probe systems for the development a contra-propagation pump-probe technique for the study of the polarization dependence of intra-band carrier dynamics in semiconductor optical amplifiers and the influence of these dynamics on nonlinear polarization rotation. This project, in collaboration with Dr. P.Landais (DCU), was interested in the potential of nonlinear polarization for optical switching. The collaboration led to a further successful project which demonstrated the lowest noise-figure to date for a bulk SOA using novel a multi-contact structure to control the carrier distribution along the length of the device.