David Mc Closkey
Ussher Assistant Professor, Physics

Biography

David McCloskey is currently the Ussher Assistant Professor of the Science of Energy and Energy systems at the University of Dublin, Trinity College. He leads the Nanothermal research group, in the school of Physics at Trinity College Dublin. His current research interests include, waste heat harvesting, time and frequency domain thermal imaging techniques, thermoelectrics, thermal interface materials, heat exchangers, plasmonics, heat transfer in 2D materials, diamond photonics, optical microresonaotors , near field optics, heat transport on nanoscale, and nanofabrication (EBL, UV litho, FIB, Helium ion microscopy and lithography). He is developing a multidisciplinary masters program in the science of energy hosted across the Schools of Physics, Chemistry, Engineering and Geology. David earned his Bachelor of Arts in Theoretical Physics at Trinity College Dublin in 2008, and his PhD in Experimental optics from the same institute in 2012, working with Prof. John Donegan. In his thesis work he studied electromagnetic scattering from non-spherical micron scale dielectric particles. He also studied whispering gallery modes and visible light integrated optics in silicon nitride. After completing his PhD, David worked as a postdoctoral researcher on a number of academic and industrial projects related to electromagnetism and thermal transport. In particular he has worked in collaboration with Western Digital Corporation on the optical design of heat assisted magnetic recording heads for the next generation of magnetic hard-drives. Other projects include sub-micron resolution thermal imaging of III-V diode lasers, with Nokia/ Bell Labs. He has worked as a visiting researcher in Massachusetts Institute of Technology (MIT), the institute of Photonic Sciences (ICFO), Barcelona, Institut Fresnel, Marseille, and NUIG in Galway.

Publications and Further Research Outputs

Peer-Reviewed Publications

Jennings B.D, McCloskey D, Gough J.J, Hoang T, Abadía N, Zhong C, Karademir E, Bradley A.L, Donegan J.F, Characterisation of multi-mode propagation in silicon nitride slab waveguides, Journal of Optics (United Kingdom), 19, (1), 2017, p015604- Journal Article, 2017 DOI URL

Jennings B.D, Abadia N, Zhong C, Karademir E, McCloskey D, Donegan J.F, Fluorescence imaging of waveguide mode beating and propagation in tapered and bend regions, 2016 Conference on Lasers and Electro-Optics, CLEO 2016, 2016, 2016 Conference Paper, 2016 URL

Zhong, C., Ballantine, K.E., Kervick, C., Smith, C.M., Mullarkey, D., Shvets, I.V., Donegan, J.F., McCloskey, D., Mapping of surface plasmon dispersion in thin Ag-Au layered composite films, Journal of the Optical Society of America B: Optical Physics, 33, (4), 2016, p566-573 Journal Article, 2016 DOI

Zhong C, McCloskey D, Wang J.J, Jennings B.D, Abadia N, Karademir E, Zheng J.-Y, Donegan J.F, Nano-focusing in an air-slot plasmonic waveguide with a tapered grating coupler, 2016 Conference on Lasers and Electro-Optics, CLEO 2016, 2016, 2016 Conference Paper, 2016 URL

Curtis J O'Kelly, Jessamyn A Fairfield, David McCloskey, Hugh G Manning, John F Donegan, John J Boland, Associative Enhancement of Time Correlated Response to Heterogeneous Stimuli in a Neuromorphic Nanowire Device, Advanced Electronic Materials, 2, (6), 2016 Journal Article, 2016

Backes C, Paton K.R, Hanlon D, Yuan S, Katsnelson M.I, Houston J, Smith R.J, McCloskey D, Donegan J.F, Coleman J.N, Spectroscopic metrics allow in situ measurement of mean size and thickness of liquid-exfoliated few-layer graphene nanosheets, Nanoscale, 8, (7), 2016, p4311 - 4323 Journal Article, 2016 DOI TARA - Full Text URL

Harvey A, Backes C, Gholamvand Z, Hanlon D, Mcateer D, Nerl H.C, Mcguire E, Seral-Ascaso A, Ramasse Q.M, Mcevoy N, Winters S, Berner N.C, Mccloskey D, Donegan J.F, Duesberg G.S, Nicolosi V, Coleman J.N, Preparation of gallium sulfide nanosheets by liquid exfoliation and their application as hydrogen evolution catalysts, Chemistry of Materials, 27, (9), 2015, p3483 - 3493 Journal Article, 2015 TARA - Full Text URL DOI

Gough J.J, McCloskey D, Caridad J.M, Krstic V, Muller M, Gaponik N, Bradley A.L, Chiral Ag nanostructure arrays as optical antennas, 2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2015, 2015, 2015, pp88 - 90 Conference Paper, 2015 URL DOI

Bell AP, Fairfield JA, McCarthy EK, Mills S, Boland JJ, Baffou G, McCloskey D, Quantitative study of the photothermal properties of metallic nanowire networks., 2015 Journal Article, 2015

Caridad J.M, McCloskey D, Rossella F, Bellani V, Donegan J.F, Krsti- V, Effective Wavelength Scaling of and Damping in Plasmonic Helical Antennae, ACS Photonics, 2, (6), 2015, p675 - 679 Journal Article, 2015 URL DOI

David McCloskey, Kyle E. Ballantine, Paul R. Eastham, and John F. Donegan, Photonic nanojets in Fresnel zone scattering from non-spherical dielectric particles, Optics Express, 20, 2015, p26326- Journal Article, 2015 DOI

Caridad, J.M., McCloskey, D., Donegan, J.F., Krstić, V., Controllable growth of metallic nano-helices at room temperature conditions, Applied Physics Letters, 105, (23), 2014, p233114- Journal Article, 2014 DOI TARA - Full Text

Lee, T.-K., Kim, H.-S., Oh, G.-Y., (...), Donegan, J.F., Choi, Y.-W. , Systematic analysis of whispering-gallery modes in planar silicon nitride microdisks, Optics Communications, 322, 2014, p188-197 Journal Article, 2014 DOI

Backes, C, Smith, RJ, McEvoy, N, Berner, NC, McCloskey, D, Nerl, HC, O'Neill, A, King, PJ, Higgins, T, Hanlon, D, Scheuschner, N, Maultzsch, J, Houben, L, Duesberg, GS, Donegan, JF, Nicolosi, V, Coleman, JN, Edge and confinement effects allow in situ measurement of size and thickness of liquid-exfoliated nanosheets, Nature Communications, 5, 2014, p4576- Journal Article, 2014 DOI TARA - Full Text

D. McCloskey, D. Fox, N. O'Hara, V. Usov, D. Scanlan, N. McEvoy, G. S. Duesberg, G. L. W. Cross, H. Z. Zhang and J. F. Donegan, Helium ion microscope generated nitrogen-vacancy centres in type Ib diamond, Applied Physics Letters, 104, 2014, p031109- Journal Article, 2014 DOI TARA - Full Text

R. T. Darcy, D. McCloskey, K. E. Ballantine, J. G. Lunney, P. R. Eastham and J. F. Donegan, Conical diffraction intensity profiles generated using a top-hat input beam, Optics Express, 22, (9), 2014, p11290- Journal Article, 2014 DOI TARA - Full Text

McCloskey, D, Fox, D, O'Hara, N, Usov, V, Scanlan, D, McEvoy, N, Duesberg, GS, Cross, GLW, Zhang, HZ, Donegan, JF, Helium ion microscope generated nitrogen-vacancy centres in type Ib diamond, Applied Physics Letters, 104, (3), 2014, p031109- Journal Article, 2014 TARA - Full Text DOI

McCloskey, D. Donegan, J.F., The Cartesian oval as a planar elliptical solid immersion lens , International Conference on Transparent Optical Networks, 2014, 6876329- Conference Paper, 2014 DOI

Finn, D.J., Lotya, M., Cunningham, G., Smith, R.J., McCloskey, D., Donegan, J.F., Coleman, J.N., Inkjet deposition of liquid-exfoliated graphene and MoS2 nanosheets for printed device applications, Journal of Materials Chemistry C, 2, (5), 2014, p925-932 Journal Article, 2014 TARA - Full Text DOI

Savateeva, D., Melnikau, D., McCarthy, J.E., (...), Rusakov, K.I., Rakovich, Y.P. , Optical properties of hollow polymer microspheres loaded with semiconductor quantum dots, International Conference on Transparent Optical Networks, International Conference on Transparent Optical Networks , Graz; Austria, 6-10 July, 2014, pp6876653- Conference Paper, 2014 DOI

R. T. Darcy, D. McCloskey, K. E. Ballantine, B. D. Jennings, J. G. Lunney, P. R. Eastham and J. F. Donegan, White light conical diffraction, Optics Express, 21, 2013, p20394- Journal Article, 2013 DOI

McCloskey, D., Donegan, J.F., Planar elliptical solid immersion lens based on a Cartesian oval, Applied Physics Letters, 103, (9), 2013, p091101 Journal Article, 2013 TARA - Full Text DOI

Hanley, C.A., McCarthy, J.E., Purcell-Milton, F., (...), Rakovich, Y.P., Gun'Ko, Y.K., Preperation and investigation of quantum-dot-loaded hollow polymer microspheres, Journal of Physical Chemistry C, 117, (46), 2013, p24527-24536 Journal Article, 2013 DOI

Cunningham, G., Khan, U., Backes, C., Hanlon, D., McCloskey, D., Donegan, J.F., Coleman, J.N., Photoconductivity of solution-processed MoS2 films, .Journal of Materials Chemistry C , 1, (41), 2013, p6899-6904 Journal Article, 2013 TARA - Full Text DOI

McCloskey, D, Wang, JJ, Donegan, JF, Low divergence photonic nanojets from Si3N4 microdisks, Optics Express, 20, (1), 2012, p128-140 Journal Article, 2012 TARA - Full Text DOI

McCloskey, D., Donegan, J.F., Light scattering from silicon nitride microdisks, International Conference on Transparent Optical Networks, International Conference on Transparent Optical Networks, Coventry, 2-5 July, IEEE, 2012, 6253732 Conference Paper, 2012 DOI

McCloskey, D., Donegan, J.F., Silicon nitride microdisks in the visible range, Proceedings of the 3th International Conference on Transparent Optical Networks, International Conference on Transparent Optical Networks, Stockholm, 28-30 June, 2011, pp5971052 Conference Paper, 2011 DOI

Wang, J.J., McCloskey, D., Donegan, J.F., Optimization of parameters of photonic nanojet generated by dielectric microsphere for laser nanojet SNOM, Proceedings of SPIE - The International Society for Optical Engineering, 7th International Symposium on Precision Engineering Measurements and Instrumentation, Lijiang, 7-11 August, 8321 , 2011, pp83213Z Conference Paper, 2011 DOI

Donner JS, Baffou G, McCloskey D, Quidant R, Plasmon-assisted optofluidics., 2011 Journal Article, 2011

McCloskey, D., Rakovich, Y.P., Donegan, J.F., Controlling the properties of Photonic Jets, Proceedings of 12th International Conference on Transparent Optical Networks, ICTON , 12th International Conference on Transparent Optical Networks, ICTON , Munich, 27 June- 1 July, 2010, pp5548948 Conference Paper, 2010 DOI

Rakovich, Y.P., McCloskey, D., Donegan, J.F., Photonic nanojets in coupled microcavities , European Conference on Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference (CLEO Europe - EQEC 2009), Munich, 14-19 June, IEEE, 2009, pp5191625 Conference Paper, 2009 TARA - Full Text DOI

Non-Peer-Reviewed Publications

Krichevsky, Alexander McCloskey, David Michael Owen Bello, Frank D Wolf, Christopher B, 'System and method of diffractive focusing of light in a waveguide', US patent office, 9,111,558, 2016 Patent, 2016 URL

Krichevsky, Alexander Wolf, Christopher B Bello, Frank D Ballantine, Kyle E Donegan, John McCloskey, David , 'Method and system for reducing undesirable reflections in a HAMR write apparatus', US patent office, 9,484,051, 2016 Patent, 2016 DOI

Research Expertise

Description

Waste heat harvesting, time and frequency domain thermal imaging techniques, thermoelectrics, thermal interface materials, heat exchangers, plasmonics, heat transfer in 2D materials, diamond photonics, optical microresonaotors , near field optics, heat transport on nanoscale, and nanofabrication (EBL, UV litho, FIB, Helium ion microscopy and lithography). He is developing a multidisciplinary masters program in the science of energy hosted across the Schools of Physics, Chemistry, Engineering and Geology.

Projects

  • Title
    • Thermal Properties of Metallic Nanowires: Determining the Ultimate Limit in Miniaturisation of Metallic Electrical Interconnects
  • Summary
    • Electrical interconnects are essential elements of all integrated circuits (ICs), and constitute the wiring system that provides power and distributes clock signals to various functional blocks in a complementary metal oxide semiconductor (CMOS) IC. The international technology roadmap for semiconductors (ITRS) has identified metallic interconnect scaling as a key challenge limiting overall chip performance. Limited bandwidth of interconnects in processors has resulted in only 10% of transistors being active at any time, and has led to a stagnation in the rate of increase of computing power. As feature sizes continue to shrink in ICs, interconnect dimensions are becoming comparable to the electron mean free path. Electron scattering from grain boundaries, surfaces and defects now dominates the electrical transport resulting in greatly increased resistivity. Since electrons are the main carriers of heat in metallic systems the thermal conductivity is also greatly diminished. This means that heat cannot be easily removed from sources and the local temperature can spike leading to failure in devices. This problem is compounded by a reduction in material melting point at the nanoscale known as melting point depression. This project is designed to investigate electrical and thermal transport in chemically synthesised metallic nanowires in order to determine the ultimate scaling limit of metallic interconnects. A key differentiator in this project is that the local temperature will be determined using an optical technique, decoupling thermal and electrical measurements. Optical techniques allow non-invasive measurement of local temperature distributions with ~250 nm resolution, removing the need to rely on assumptions about the current induced heating in the nanowire. Understanding and controlling the thermal properties of nanomaterials will lead to disruptive breakthroughs in micro and nano-electronic devices with global technological and economic impact.
  • Funding Agency
    • Irish Research Council
  • Date From
    • 01/09/2015
  • Date To
    • 01/09/2016
  • Title
    • Heating in GaN Electronics
  • Funding Agency
    • SFI, Dublin, Ireland
  • Date From
    • 01/08/2015
  • Date To
    • 01/12/2015
  • Title
    • Visible Light Scattering from micron scale silicon nitride structures
  • Summary
    • Spatial confinement and angular divergence of electromagnetic radiation are intimately related through diffraction, which imposes the so called diffraction limit on light confinement and imaging resolution using far-field optics. This limit can be surpassed close to particles or interfaces by incorporating evanescent fields. Recent studies show that light scattering from micron scale dielectric particles can produce optical near-fields extending relatively far from the particle, with features which break the free space diffraction limit. Specifically light can be focused to beams with a sub-wavelength waist and still retain a low divergence angle. In this thesis we explore fully light scattering in this size regime using an experimental model system of planar scatterers fabricated in silicon nitride using electron beam lithography. This system gives precise control over the shape, size and position of the scatterers. We show that these low divergence features are a general property observed in the near-field of arbitrarily shaped scatterers in this size regime. Controlling the direction and polarization of the incident light and the morphology of the particle allows direct control over the intensity distribution in the near-field.
  • Funding Agency
    • Irish Research Council
  • Date From
    • 01/09/2008
  • Date To
    • 01/09/2012
  • Title
    • Quantitative Temperature mapping in metallic nanowires
  • Funding Agency
    • Irish Research Council
  • Date From
    • 01/06/2014
  • Date To
    • 01/08/2015

Keywords

Solar, Thermoelectric Conversion; THERMAL DIFFUSIVITY; THERMAL ENERGY; THERMAL MANAGEMENT; Thermal radiation; THERMAL-CONDUCTIVITY; Thermoelectric Generators; THERMOELECTRIC-POWER; Thermoelectricity; Thermoreflectance; ULTRAFAST PROCESSES

Recognition

Memberships

Member of the optical society of America (OSA), and the Institute of Physics(IOP).