Dr Rair Macedo

  • Research Fellow (Electronic & Nanoscale Engineering)

Research interests

 I study magnetism and electromagnetic properties of matter. My current research interests include:

  • Magnons, polaritons, and optical properties of magnets;
  • Anisotropy in condensed matter as route to hyperbolic media;
  • Novel optical effects including: Negative refraction, focusing by flat lenses, Goos-Hanchen shifts and nonreciprocity.

I am also currently working on ordering processes in a new class of frustrated and disordered systems called 'artificial spin ice', these include:

  • Macro-ferromagnetism in 'pinwheel' spin ice systems;
  • Wall and domain formation.

I am a member of the Quantum Circuits Laboratory.

 

Biography

I started pursuing research when I was 16 as a part of my BSc studies in the area of novel optical effects in natural dielectric media. In that work it was shown how quartz crystals could be a natural source for negative refraction, a pioneering research in the area of natural hyperbolic materials for optical applications.

My PhD work at the University of Glasgow was undertaken in order to pursue a similar area, but at an advanced theoretical level, by modelling electromagnetic properties of magnetic structures. During this time I was the first to suggest possibilities for focusing through transmission using simple antiferromagnetic slabs which could be tuned by externally applied fields.

After my PhD, as a research assistant, I worked on models for artificial multifunctional magnets. These structures are nanomagnetic islands artificially structured to display new physical.

I am currently a Research Fellow working with novel optical effects in condensed matter, advanced structured materials, and devices. In particular, I explore novel properties and materials that can control and manipulate electromagnetic waves. For this, I have obtained funding from the Leverhulme Trust (just under £90k) and the Lord Kelvin Adam Smith initiative of The University of Glasgow (£100k).


Publications

Selected publications

Macêdo, R. , Dumelow, T. and Stamps, R. L. (2016) Tunable focusing in natural hyperbolic magnetic media. ACS Photonics, 3(9), pp. 1670-1677. (doi:10.1021/acsphotonics.6b00321)

Dumelow, T., Rodrigues da Silva, R., Macêdo, R. , da Costa, J.A.P., Honorato, S.B. and Ayala, A.P. (2011) Negative refraction of far-infrared radiation in quartz. Optics and Photonics News, 22(12), p. 42. (doi:10.1364/OPN.22.12.000042)

Macêdo, R. (2017) Tunable hyperbolic media: magnon-polaritons in canted antiferromagnets. In: Camley, R. E. and Stamps, R. L. (eds.) Solid State Physics. Elsevier, pp. 91-155. ISBN 9780128119914 (doi:10.1016/bs.ssp.2017.10.001)

Macêdo, R. , Stamps, R. L. and Dumelow, T. (2014) Spin canting induced large nonreciprocal Goos-Hänchen shifts. Optics Express, 22(23), pp. 28467-28478. (doi:10.1364/OE.22.028467)

Macêdo, R. and Dumelow, T. (2014) Tunable all-angle negative refraction using antiferromagnets. Physical Review B, 89(3), 035135. (doi:10.1103/PhysRevB.89.035135)

All publications

List by: Type | Date

Jump to: 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010
Number of items: 25.

2019

Paterson, G. W. et al. (2019) Heisenberg pseudo-exchange and emergent anisotropies in field-driven pinwheel artificial spin ice. Physical Review B, 100(17), 174410. (doi:10.1103/PhysRevB.100.174410)

Proskurin, I., Macedo, R. and Stamps, R. L. (2019) Microscopic origin of level attraction for a coupled magnon-photon system in a microwave cavity. New Journal of Physics, 21(9), 095003. (doi:10.1088/1367-2630/ab3cb7)

Macauley, G. M., Paterson, G. W. , Li, Y., Macêdo, R. , McVitie, S. and Stamps, R. L. (2019) Ice-rule made manifold: phase transitions, topological defects and manifold restoration in two-dimensional artificial spin systems. arXiv, (Unpublished)

Yarbrough, P. M., Livesey, K. L., Camley, R. E. and Macêdo, R. (2019) Far-infrared reflection from heterostructures made of ultrathin ferromagnetic layers. Physical Review Applied, 12(2), 024004. (doi:10.1103/PhysRevApplied.12.024004)

Li, Y. et al. (2019) Superferromagnetism and domain-wall topologies in artificial 'pinwheel' spin ice. ACS Nano, 13(2), pp. 2213-2222. (doi:10.1021/acsnano.8b08884) (PMID:30588800)

Macedo, R. and Camley, R. E. (2019) Engineering terahertz surface magnon-polaritons in hyperbolic antiferromagnets. Physical Review B, 99, 014437. (doi:10.1103/PhysRevB.99.014437)

2018

Macêdo, R. , Dumelow, T., Camley, R. E. and Stamps, R. L. (2018) Oriented asymmetric wave propagation and refraction bending in hyperbolic media. ACS Photonics, 5(12), pp. 5086-5094. (doi:10.1021/acsphotonics.8b01402)

Macêdo, R. , Livesey, K. L. and Camley, R. E. (2018) Using magnetic hyperbolic metamaterials as high frequency tunable filters. Applied Physics Letters, 113(12), 121104. (doi:10.1063/1.5049602)

Macêdo, R. , Macauley, G.M., Nascimento, F.S. and Stamps, R.L. (2018) Apparent ferromagnetism in the 'pinwheel' artificial spin ice. Physical Review B, 98, 014437. (doi:10.1103/PhysRevB.98.014437)

2017

Macêdo, R. (2017) Tunable hyperbolic media: magnon-polaritons in canted antiferromagnets. In: Camley, R. E. and Stamps, R. L. (eds.) Solid State Physics. Elsevier, pp. 91-155. ISBN 9780128119914 (doi:10.1016/bs.ssp.2017.10.001)

2016

Macêdo, R. , Dumelow, T. and Stamps, R. L. (2016) Tunable focusing in natural hyperbolic magnetic media. ACS Photonics, 3(9), pp. 1670-1677. (doi:10.1021/acsphotonics.6b00321)

2015

Macêdo, R. , Dumelow, T. and Stamps, R.L. (2015) Tunable Magneto-Optical Effects in Antiferromagnetic Structures. In: 2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), Oxford, UK, 7-12 Sept 2015, pp. 454-456. ISBN 9781479978366 (doi:10.1109/MetaMaterials.2015.7342485)

2014

Macêdo, R. , Stamps, R. L. and Dumelow, T. (2014) Spin canting induced large nonreciprocal Goos-Hänchen shifts. Optics Express, 22(23), pp. 28467-28478. (doi:10.1364/OE.22.028467)

Macêdo, R. and Dumelow, T. (2014) Tunable all-angle negative refraction using antiferromagnets. Physical Review B, 89(3), 035135. (doi:10.1103/PhysRevB.89.035135)

Macêdo, R. , Rodrigues da Silva, R., Dumelow, T. and da Costa, J.A.P. (2014) MgF2 as a material exhibiting all-angle negative refraction and subwavelength imaging due to the phonon response in the far infrared. Optics Communications, 310, pp. 94-99. (doi:10.1016/j.optcom.2013.07.065)

2013

Macêdo, R. , Costa e Silva, J., Chaves, A., Farias, G.A. and Ferreira, R. (2013) Electric and magnetic field effects on the excitonic properties of elliptic core–multishell quantum wires. Journal of Physics: Condensed Matter, 25(48), 485501. (doi:10.1088/0953-8984/25/48/485501)

Macêdo, R. , Costa e Silva, J., Chaves, A., Farias, G.A. and Ferreira, R. (2013) Magnetic field induced shell-to-core confinement transition in type-II semiconductor quantum wires. Journal of Applied Physics, 113(15), 153710. (doi:10.1063/1.4802588)

Macêdo, R. and Dumelow, T. (2013) Beam shifts on reflection of electromagnetic radiation off anisotropic crystals at optic phonon frequencies. Journal of Optics, 15(1), 014013. (doi:10.1088/2040-8978/15/1/014013)

2012

Estevâm da Silva, R., Macêdo, R. , Dumelow, T., da Costa, J.A.P., Honorato, S.B. and Ayala, A.P. (2012) Far-infrared slab lensing and subwavelength imaging in crystal quartz. Physical Review B, 86(15), 155152. (doi:10.1103/PhysRevB.86.155152)

Macêdo, R. , Dumelow, T. and da Costa, J. A.P. (2012) Beam Shifts of Far-Infrared Radiation on Reflection off the Anisotropic Crystal LiYF4. In: Latin America Optics and Photonics Conference 2012, São Sebastião, Brazil, 10-13 Nov 2012, LT2A.20. ISBN 9781557529589 (doi:10.1364/LAOP.2012.LT2A.20)

Macêdo, R. , Dumelow, T. and da Costa, J. A.P. (2012) Tunable All-Angle Negative Refraction in Antiferromagnets. In: Latin America Optics and Photonics Conference 2012, São Sebastião, Brazil, 10-13 Nov 2012, LM3A.5. ISBN 9781557529589 (doi:10.1364/LAOP.2012.LM3A.5)

Macêdo, R. , Sena, M. S., Costa e Silva, J., Chaves, A. and da Costa, J. A. P. (2012) The role of surface roughness on the electron confinement in semiconductor quantum dots. In: Latin America Optics and Photonics Conference 2012, São Sebastião, Brazil, 10-13 Nov 2012, LM2A.19. ISBN 9781557529589 (doi:10.1364/LAOP.2012.LM2A.19)

2011

Dumelow, T., Rodrigues da Silva, R., Macêdo, R. , da Costa, J.A.P., Honorato, S.B. and Ayala, A.P. (2011) Negative refraction of far-infrared radiation in quartz. Optics and Photonics News, 22(12), p. 42. (doi:10.1364/OPN.22.12.000042)

2010

Rodrigues da Silva, R., Macêdo, R. , Dumelow, T., da Costa, J.A.P., Honorato, S.B. and Ayala, A.P. (2010) Using phonon resonances as a route to all-angle negative refraction in the far-infrared region: the case of crystal quartz. Physical Review Letters, 105(16), 163903. (doi:10.1103/PhysRevLett.105.163903)

da Silva, R. R., Macedo, R. , Dumelow, T., da Costa, J. A., Honorato, S. B. and Ayala, A. P. (2010) All-Angle Negative Refraction from the Phonon Response in Anisotropic Crystals. In: Latin America Optics and Photonics 2010, Recife, Brazil, 27-30 Sep 2010, WE23. ISBN 9781557529039 (doi:10.1364/LAOP.2010.WE23)

This list was generated on Mon Nov 18 20:58:07 2019 GMT.
Number of items: 25.

Articles

Paterson, G. W. et al. (2019) Heisenberg pseudo-exchange and emergent anisotropies in field-driven pinwheel artificial spin ice. Physical Review B, 100(17), 174410. (doi:10.1103/PhysRevB.100.174410)

Proskurin, I., Macedo, R. and Stamps, R. L. (2019) Microscopic origin of level attraction for a coupled magnon-photon system in a microwave cavity. New Journal of Physics, 21(9), 095003. (doi:10.1088/1367-2630/ab3cb7)

Macauley, G. M., Paterson, G. W. , Li, Y., Macêdo, R. , McVitie, S. and Stamps, R. L. (2019) Ice-rule made manifold: phase transitions, topological defects and manifold restoration in two-dimensional artificial spin systems. arXiv, (Unpublished)

Yarbrough, P. M., Livesey, K. L., Camley, R. E. and Macêdo, R. (2019) Far-infrared reflection from heterostructures made of ultrathin ferromagnetic layers. Physical Review Applied, 12(2), 024004. (doi:10.1103/PhysRevApplied.12.024004)

Li, Y. et al. (2019) Superferromagnetism and domain-wall topologies in artificial 'pinwheel' spin ice. ACS Nano, 13(2), pp. 2213-2222. (doi:10.1021/acsnano.8b08884) (PMID:30588800)

Macedo, R. and Camley, R. E. (2019) Engineering terahertz surface magnon-polaritons in hyperbolic antiferromagnets. Physical Review B, 99, 014437. (doi:10.1103/PhysRevB.99.014437)

Macêdo, R. , Dumelow, T., Camley, R. E. and Stamps, R. L. (2018) Oriented asymmetric wave propagation and refraction bending in hyperbolic media. ACS Photonics, 5(12), pp. 5086-5094. (doi:10.1021/acsphotonics.8b01402)

Macêdo, R. , Livesey, K. L. and Camley, R. E. (2018) Using magnetic hyperbolic metamaterials as high frequency tunable filters. Applied Physics Letters, 113(12), 121104. (doi:10.1063/1.5049602)

Macêdo, R. , Macauley, G.M., Nascimento, F.S. and Stamps, R.L. (2018) Apparent ferromagnetism in the 'pinwheel' artificial spin ice. Physical Review B, 98, 014437. (doi:10.1103/PhysRevB.98.014437)

Macêdo, R. , Dumelow, T. and Stamps, R. L. (2016) Tunable focusing in natural hyperbolic magnetic media. ACS Photonics, 3(9), pp. 1670-1677. (doi:10.1021/acsphotonics.6b00321)

Macêdo, R. , Stamps, R. L. and Dumelow, T. (2014) Spin canting induced large nonreciprocal Goos-Hänchen shifts. Optics Express, 22(23), pp. 28467-28478. (doi:10.1364/OE.22.028467)

Macêdo, R. and Dumelow, T. (2014) Tunable all-angle negative refraction using antiferromagnets. Physical Review B, 89(3), 035135. (doi:10.1103/PhysRevB.89.035135)

Macêdo, R. , Rodrigues da Silva, R., Dumelow, T. and da Costa, J.A.P. (2014) MgF2 as a material exhibiting all-angle negative refraction and subwavelength imaging due to the phonon response in the far infrared. Optics Communications, 310, pp. 94-99. (doi:10.1016/j.optcom.2013.07.065)

Macêdo, R. , Costa e Silva, J., Chaves, A., Farias, G.A. and Ferreira, R. (2013) Electric and magnetic field effects on the excitonic properties of elliptic core–multishell quantum wires. Journal of Physics: Condensed Matter, 25(48), 485501. (doi:10.1088/0953-8984/25/48/485501)

Macêdo, R. , Costa e Silva, J., Chaves, A., Farias, G.A. and Ferreira, R. (2013) Magnetic field induced shell-to-core confinement transition in type-II semiconductor quantum wires. Journal of Applied Physics, 113(15), 153710. (doi:10.1063/1.4802588)

Macêdo, R. and Dumelow, T. (2013) Beam shifts on reflection of electromagnetic radiation off anisotropic crystals at optic phonon frequencies. Journal of Optics, 15(1), 014013. (doi:10.1088/2040-8978/15/1/014013)

Estevâm da Silva, R., Macêdo, R. , Dumelow, T., da Costa, J.A.P., Honorato, S.B. and Ayala, A.P. (2012) Far-infrared slab lensing and subwavelength imaging in crystal quartz. Physical Review B, 86(15), 155152. (doi:10.1103/PhysRevB.86.155152)

Dumelow, T., Rodrigues da Silva, R., Macêdo, R. , da Costa, J.A.P., Honorato, S.B. and Ayala, A.P. (2011) Negative refraction of far-infrared radiation in quartz. Optics and Photonics News, 22(12), p. 42. (doi:10.1364/OPN.22.12.000042)

Rodrigues da Silva, R., Macêdo, R. , Dumelow, T., da Costa, J.A.P., Honorato, S.B. and Ayala, A.P. (2010) Using phonon resonances as a route to all-angle negative refraction in the far-infrared region: the case of crystal quartz. Physical Review Letters, 105(16), 163903. (doi:10.1103/PhysRevLett.105.163903)

Book Sections

Macêdo, R. (2017) Tunable hyperbolic media: magnon-polaritons in canted antiferromagnets. In: Camley, R. E. and Stamps, R. L. (eds.) Solid State Physics. Elsevier, pp. 91-155. ISBN 9780128119914 (doi:10.1016/bs.ssp.2017.10.001)

Conference Proceedings

Macêdo, R. , Dumelow, T. and Stamps, R.L. (2015) Tunable Magneto-Optical Effects in Antiferromagnetic Structures. In: 2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), Oxford, UK, 7-12 Sept 2015, pp. 454-456. ISBN 9781479978366 (doi:10.1109/MetaMaterials.2015.7342485)

Macêdo, R. , Dumelow, T. and da Costa, J. A.P. (2012) Beam Shifts of Far-Infrared Radiation on Reflection off the Anisotropic Crystal LiYF4. In: Latin America Optics and Photonics Conference 2012, São Sebastião, Brazil, 10-13 Nov 2012, LT2A.20. ISBN 9781557529589 (doi:10.1364/LAOP.2012.LT2A.20)

Macêdo, R. , Dumelow, T. and da Costa, J. A.P. (2012) Tunable All-Angle Negative Refraction in Antiferromagnets. In: Latin America Optics and Photonics Conference 2012, São Sebastião, Brazil, 10-13 Nov 2012, LM3A.5. ISBN 9781557529589 (doi:10.1364/LAOP.2012.LM3A.5)

Macêdo, R. , Sena, M. S., Costa e Silva, J., Chaves, A. and da Costa, J. A. P. (2012) The role of surface roughness on the electron confinement in semiconductor quantum dots. In: Latin America Optics and Photonics Conference 2012, São Sebastião, Brazil, 10-13 Nov 2012, LM2A.19. ISBN 9781557529589 (doi:10.1364/LAOP.2012.LM2A.19)

da Silva, R. R., Macedo, R. , Dumelow, T., da Costa, J. A., Honorato, S. B. and Ayala, A. P. (2010) All-Angle Negative Refraction from the Phonon Response in Anisotropic Crystals. In: Latin America Optics and Photonics 2010, Recife, Brazil, 27-30 Sep 2010, WE23. ISBN 9781557529039 (doi:10.1364/LAOP.2010.WE23)

This list was generated on Mon Nov 18 20:58:07 2019 GMT.

Supervision

Current Summer Students:

  • Cameron McEleney (Carnegie Trust for the Universities of Scotland)
  • Rory Holland (EPSRC)
  • Niall Gray 

Current MEng/MSc Students:

  • Yingchao Yuan (MSc)

Research datasets

Jump to: 2019
Number of items: 1.

2019

Li, Y., Paterson, G., Macauley, G., Nascimento, F. S., Ferguson, C., Morley, S. A., Rosamond, M. C., Linfield, E. H., MacLaren, D. , Macedo, R. , Marrows, C. H., McVitie, S. and Stamps, R. (2019) Superferromagnetism and Domain-Wall Topologies in Artificial 'Pinwheel' Spin Ice. [Data Collection]

This list was generated on Mon Nov 18 20:58:08 2019 GMT.