Physics and Astronomy

Photo of Prof Jacopo Bertolotti

Prof Jacopo Bertolotti

Associated Professor in Physics

 J.Bertolotti@exeter.ac.uk

 (Streatham) 5695

 01392 725695

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Overview

Current Research Interests

Imaging in biological systems: Scattering is a huge problem for non-invasive optical imaging in biological systems, as scattering from the inhomogeneities in the tissue often limit microscopy to the surface of the sample or (at best) to a shallow depth. Optical imaging through a strongly scattering system is currently an unsolved problem, but in recent years several possible approaches were put forward. The line of research I follow is based on the idea that multiple scattered light possesses non-trivial correlations, which can be exploited to extract information from beyond a scattering material.

Analogue computation using light: Nowadays we are used to the idea that computation is synonymous with digital computers, but it wasn't always like that. Analogue computers had a very important role until a few decades ago. Modern technological developments, like the introduction of fast and reliable spatial light modulators, allow us to control light propagation to a degree that was unthinkable just a few years ago, opening the possibility to a revival of analogue computation (or at least hybrid analogue-digital computation) using light to perform selected tasks at the speed of light.

Light scattering in correlated systems: Describing transport in a disordered environment is a complicated task, so it is no surprise that some simplifying assumptions are made. The most common of these assumptions is that the disorder can be modeled as white noise, i.e. all the correlations are neglected. But if we look around us most of what we see definitively does not show a crystalline  kind of order and periodicity, but it is not even white noise. Most of the time things have some degree of randomness, but still have correlations. Understanding how light (or other waves) propagate in a correlated disordered potential is still an understudied problem, which can have very practical applications.



Past interests (that resurface quite often)

Anderson localization: When light scattering gets so strong that successive scattering event can not be treated as independent anymore, interference between different possible paths become dominant and the system has a phase transition from a conductive (diffusive) regime to a localized regime where diffusion-like transport is impossible. This regime is known as Anderson localization. There is a heated debate if Anderson localization of light in 3D is even possible at all, but even Anderson localization in 1D and 2D keeps showing surprising results, even after many years of study.

Anomalous transport: In the textbook case of normal diffusion, particle transport is described as a random walk to which all the steps give the same contribution (Brownian motion). Superdiffusion occurs when the transport is dominated by a few very large steps (Lévy flights). In this regime the variance of the step length distribution diverges and the mean square displacement grows faster than linear with time, leading to what is known as anomalous diffusion.

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Publications

Copyright Notice: Any articles made available for download are for personal use only. Any other use requires prior permission of the author and the copyright holder.

| 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 |

2024

2023

2022

2021

2020

2019

  • Hofer M, Soeller C, Bertolotti J, Brasselet S. (2019) Epi wide-field fluorescence microscopy through scattering media (Conference Presentation), Adaptive Optics and Wavefront Control for Biological Systems V, DOI:10.1117/12.2509710.
  • de Galarreta CR, Sinev I, Alexeev AM, Trofimov P, Ladutenko K, Carrillo SG-C, Gemo E, Baldycheva A, Nagareddy VK, Bertolotti J. (2019) All-Dielectric Silicon/Phase-Change Optical Metasurfaces with Independent and Reconfigurable Control of Resonant Modes, DOI:10.48550/arxiv.1901.04955.
  • Ruiz De Galarreta Fanjul C, Alexeev A, Sinev I, Trofimov P, Bertolotti J, Wright CD. (2019) All-dielectric hybrid silicon/Ge2Sb2Te5 optical metasurfaces for tunable and switchable light control in the near infrared, Nanometa 2019: 7th International Topical Meeting on Nanophotonics and Metamaterials, Seefeld, Austria, 3rd - 6th Jan 2019.
  • Herapath RI, Hornett SM, Seifert T, Jakob G, Klaui M, Bertolotti J, Kampfrath T, Hendry E. (2019) Impact of Pump Wavelength on Terahertz Emission of a Cavity-Enhanced Spintronic Trilayer, International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, volume 2019-September, DOI:10.1109/IRMMW-THz.2019.8873865.
  • Shields J, Ruiz de Galarreta C, Bertolotti J, Wright CD. (2019) Simultaneous modulation in the O and C communications bands using hybrid dielectric-plasmonic phase-change metasurfaces, European \ Phase Change and Ovonics Symposium, Minatec, Grenoble, France, 8th - 10th Sep 2019, E\PCOS 2019, pages 178-179.
  • Penketh H, Bertolotti J, Barnes WL. (2019) Optimal position of an emitter in a wavelength-scale parabolic reflector, Applied Optics, volume 58, no. 29, pages 7957-7957, DOI:10.1364/ao.58.007957. [PDF]
  • Jacucci G, Bertolotti J, Vignolini S. (2019) Role of Anisotropy and Refractive Index in Scattering and Whiteness Optimization, Advanced Optical Materials, volume 7, no. 23, DOI:10.1002/adom.201900980.
  • Bertolotti J. (2019) One size doesn’t fit all, Nature Physics, volume 15, no. 8, DOI:10.1038/s41567-019-0625-2.
  • . (2019) Resolution enhancement of wide-field fluorescence microscopy with a scattering lens, Proceedings 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference, CLEO/Europe-EQEC 2015.
  • Bertolotti J, Starshynov I, Paniagua-Diaz A. (2019) Blind ghost imaging.
  • Starshynov I. (2019) Quantum and classical correlations of multiply scattered light.
  • Galarreta CRD, Sinev I, Alexeev AM, Trofimov P, Ladutenko K, Carrillo SG-C, Gemo E, Baldycheva A, Nagareddy VK, Bertolotti J. (2019) All-Dielectric Silicon/Phase-Change Optical Metasurfaces with Independent and Reconfigurable Control of Resonant Modes. [PDF]
  • Jacucci G, Onelli OD, De Luca A, Bertolotti J, Sapienza R, Vignolini S. (2019) Coherent backscattering of light by an anisotropic biological network, Interface Focus, volume 9, no. 1, DOI:10.1098/rsfs.2018.0050.
  • Paniagua-Diaz AM, Starshynov I, Fayard N, Goetschy A, Pierrat R, Carminati R, Bertolotti J. (2019) Blind Ghost Imaging, Optica, DOI:10.1364/OPTICA.6.000460.

2018

2017

  • Gaio M, Saxena D, Bertolotti J, Pisignano D, Camposeo A, Sapienza R. (2017) A nanophotonic laser on a graph, DOI:10.48550/arxiv.1710.06728.
  • Yüce E, Lian J, Sokolov S, Bertolotti J, Combrié S, De Rossi A, Mosk AP. (2017) Adaptive control of necklace states in a photonic crystal waveguide, DOI:10.48550/arxiv.1709.10288.
  • Starshynov I, Paniagua-Diaz AM, Fayard N, Goetschy A, Pierrat R, Carminati R, Bertolotti J. (2017) Correlations between reflected and transmitted intensity patterns emerging from opaque disordered media, DOI:10.48550/arxiv.1707.03622.
  • Paniagua-Diaz AM, Barnes WL, Bertolotti J. (2017) Enhancement of optical energy delivery through strongly scattering media by wavefront shaping techniques, Optics InfoBase Conference Papers, volume Part F82-CLEO_Europe 2017.
  • Starshynov I, Bertolotti J, Anders J. (2017) Non-classical correlations of multiply scattered light, Optics InfoBase Conference Papers, volume Part F73-QIM 2017, DOI:10.1364/QIM.2017.QT5C.3.
  • Gaio M, Saxena D, Bertolotti J, Pisignano D, Camposeo A, Sapienza R. (2017) A nanophotonic laser on a graph. [PDF]
  • Yüce E, Lian J, Sokolov S, Bertolotti J, Combrié S, Rossi AD, Mosk AP. (2017) Adaptive control of necklace states in a photonic crystal waveguide, ACS Photonics, volume 5. [PDF]
  • Ruiz de Galarreta C, Alexeev AM, Bertolotti J, Cryan MJ, Klemm M, Wright CD. (2017) The design of practicable beam steering and beam shaping phase-change metasurfaces working at telecom frequencies, European Phase Change and Ovonic Symposium, EPCOS 2017, Aachen, Germany, 3rd - 5th Sep 2017, https://www.epcos.org/.

2016

  • Bertolotti J. (2016) Multiple scattering and imaging in turbid media, pages 598-598, DOI:10.11470/jsapmeeting.2016.1.0_598.
  • Choi W, Yin C, Hooper IR, Barnes WL, Bertolotti J. (2016) Absence of Anderson localization in certain random lattices, DOI:10.48550/arxiv.1608.00473.
  • Vynck K, Bertolotti J, Barthelemy P, Wiersma DS. (2016) Superdiffusion of Light in Lévy Glasses, Optical Properties of Photonic Structures: Interplay of Order and Disorder, 227-247.
  • Choi W, Yin C, Hooper IR, Barnes WL, Bertolotti J. (2016) Absence of Anderson localization in certain random lattices, Phys. Rev. E, volume 96. [PDF]
  • Wright CD, Ruiz de Galarreta C, Trimby L, Garcia-Cuevas Carrillo S, Bertolotti J, Hewak DW, Cryan M, Klemm M, Hosseini P, Bhaskaran H. (2016) Phase-change meta-photonics, European Phase Change and Ovonic Symposium, E\PCOS2016, Trinity College Cambridge, 4th - 6th Sep 2016, https://www.epcos.org/e-pcos-2016-1.

2015

2014

2013

2012

2011

  • van Putten EG, Akbulut D, Bertolotti J, Vos WL, Lagendijk A, Mosk AP. (2011) Scattering Lens Resolves sub-100 nm Structures with Visible Light, DOI:10.48550/arxiv.1103.3643.
  • Burresi M, Radhalakshmi V, Savo R, Bertolotti J, Vynck K, Wiersma DS. (2011) Weak localization of light in superdiffusive random systems, DOI:10.48550/arxiv.1110.1447.
  • Putten EGV, Akbulut D, Bertolotti J, Lagendijk A, Mosk AP. (2011) Coherent optical imaging through opaque layers, Optics InfoBase Conference Papers.
  • Putten EGV, Akbulut D, Bertolotti J, Lagendijk A, Mosk AP. (2011) Coherent optical imaging through opaque layers, Optics InfoBase Conference Papers.
  • Putten EGV, Akbulut D, Bertolotti J, Lagendijk A, Mosk AP. (2011) Coherent optical imaging through opaque layers, Optics InfoBase Conference Papers.
  • Van Putten EG, Akbulut D, Bertolotti J, Lagendijk A, Mosk AP. (2011) Coherent optical imaging through opaque layers, 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011, DOI:10.1109/CLEOE.2011.5943161.
  • Bertolotti J, Van Putten EG, Akbulut D, Vos WL, Lagendijk A, Mosk AP. (2011) Scattering optics resolve nanostructure, Proceedings of SPIE - The International Society for Optical Engineering, volume 8102, DOI:10.1117/12.899393.
  • van Putten EG, Akbulut D, Bertolotti J, Vos WL, Lagendijk A, Mosk AP. (2011) Scattering lens resolves sub-100 nm structures with visible light, Phys Rev Lett, volume 106, no. 19, DOI:10.1103/PhysRevLett.106.193905. [PDF]

2010

2009

  • Barthelemy P, Bertolotti J, Wiersma DS. (2009) Photons, dust, and honeybees, Frontiers in Optics 2009/Laser Science XXV/Fall 2009 OSA Optics & Photonics Technical Digest, DOI:10.1364/fio.2009.fmc4.
  • Wiersma D, Barthelemy P, Bertolotti J. (2009) Optical Lévy flights and super diffusion of light, Proceedings of SPIE - The International Society for Optical Engineering, volume 7222, DOI:10.1117/12.815251.

2008

  • Cademartiri L, Ghadimi A, Kamp U, Bertolotti J, Wiersma DS, Arsenault AC, von Freymann G, Kitaev V, Ozin GA. (2008) INOR 790-Arbitrary architectures made of nanocrystal superlattices: Latest progress in nanocrystal plasma polymerization, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, volume 236. [PDF]
  • García PD, Sapienza R, Bertolotti J, Martín MD, Blanco A, Altube A, Viña L, Wiersma DS, López C. (2008) Resonant light transport through Mie modes in photonic glasses, Physical Review A - Atomic, Molecular, and Optical Physics, volume 78, no. 2, DOI:10.1103/PhysRevA.78.023823.
  • Barthelemy P, Bertolotti J, Wiersma DS. (2008) A Lévy flight for light, Nature, volume 453, no. 7194, pages 495-498, DOI:10.1038/nature06948. [PDF]

2007

  • Cademartiri L, Ghadimi A, von Freymann G, Arsenault AC, Akcakir Y, Kamp U, Bertolotti J, Wiersma DS, Kitaev V, Ozin GA. (2007) INOR 364-Nanocrystals plasma polymerization: From colloids to all-inorganic 1-D, 2-D and 3-D functional architectures, ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, volume 234. [PDF]
  • Sapienza R, García PD, Gottardo S, Bertolotti J, Martín MD, Blanco A, Viña L, Wiersma DS, Lopez C. (2007) Light transport through Mie resonances in Photonic Glasses, Optics InfoBase Conference Papers.
  • Bertolotti J, Sapienza R, Garcia PD, Lopez C, Wiersma DS. (2007) Coherent backscattering from resonant disordered media, Optics InfoBase Conference Papers.
  • Sapienza R, García PD, Martín MD, Bertolotti J, Blanco A, Gottardo S, Viña L, Wiersma DS, Lopez C. (2007) Light transport through mie resonances in photonic glasses, Optics InfoBase Conference Papers.
  • Gottardo S, Sapienza R, García PD, Bertolotti J, Blanco A, Lopez C, Wiersma DS. (2007) Random laser action from mie resonators, Optics InfoBase Conference Papers.
  • Sapienza R, García PD, Gottardo S, Bertolotti J, Martín MD, Blanco A, Viña L, Wiersma DS, Lopez C. (2007) Light transport through Mie resonances in Photonic Glasses, Conference on Lasers and Electro-Optics Europe - Technical Digest, DOI:10.1109/CLEOE-IQEC.2007.4386563.
  • Cademartiri L, Malakooti R, Von Freymann G, Akçakir Y, Arsenault AC, Petrov S, Migliori A, Bertolotti J, Wiersma DS, Kitaev V. (2007) Nanocrystal plasma polymerization, AIP Conference Proceedings, volume 893, pages 1051-1052, DOI:10.1063/1.2730258.
  • Sapienza R, García PD, Bertolotti J, Martín MD, Blanco A, Viña L, López C, Wiersma DS. (2007) Observation of resonant behavior in the energy velocity of diffused light, Phys Rev Lett, volume 99, no. 23, DOI:10.1103/PhysRevLett.99.233902. [PDF]

2006

2005

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