Santiago García-Cuevas Carrillo passed his viva!

We are delighted to announce that PGR Santiago García-Cuevas Carrillo, supervised by Prof. C. David Wright and Prof. Geoff Nash , passed his viva with minor corrections. Santiago’s thesis was on “Reconfigurable Phase-Change Metasurface Absorbers for Optoelectronic Device Applications”. The examiners were Ann-Katrin Michel from ETH Zurich and Dr. Jacopo Bertolotti from University of Exeter.

During his time within the CDT, Santiago participated in multiple outreach activities, presenting several experiments to the public at the Institute of Physics festival, CREATIONS event and WOMAD Festival 2017.

Santiago’s future plans involve working with Prof. C. David Wright as a postdoc for the project “Functionally scaled computing technology: From novel devices to non-von Neumann architectures and algorithms for a connected intelligent world (Fun-COMP)”. We wish him all the best in his future endeavours.

Below is a summary of the various publications and conferences that Santiago participated in, along with his thesis abstract.

Santiago is co-author of the following publications:


Carrillo SGC, Alexeev AM, Au YY, David Wright C. (2018) Reconfigurable phase-change meta-absorbers with on-demand quality factor control, Optics Express, volume 26, no. 20, pages 25567-25581, DOI:10.1364/OE.26.025567. [PDF]


Alexeev AM, Ruiz De Galarreta C, Garcia-Cuevas Carrillo S, Sinev IS, Samusev AK, Gemo E, Nagareddy VK, Au Y-Y, Wright CD. (2017) Tunable Dielectric Metadevices Enabled by Phase-Change Materials, European Phase Change and Ovonic Symposium, EPCOS 2017, Aachen, Germany, 3rd – 5th Sep 2017,


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, [PDF]
Garia-Ceuvas Carrillo S, Hosseini P, Bhaskaran H, Wright CD. (2016) Non-volatile Optoelectronic Phase-Change Meta-Displays, The 7th International Conference on Metamaterials, Photonic Crystals and Plasmonics, Malaga, Spain, 25th – 28th Jul 2016. [PDF]
Santiago García-Cuevas Carrillo, Geoffrey R. Nash, Hayat HH, Martin J. Cryan, Maciej Klemm, Harish Bhaskaran, Wright CD. (2016) The design of practicable phase-change metadevices for near-infrared absorber and modulator applications, Optics Express, volume 24, pages 13563-13573, DOI:10.1364/OE.24.013563. [PDF]


Wright CD, Au YY, Garcia-Cuevas Carillo S, Bhaskaran H, Hosseini P, Rios C, Pernice WHP, Stegmaier M. (2015) Exploiting Mixed-Mode Optical-Electrical Functionality in Chalcogenide Phase-Change Glasses, Glass Reflections, Cambridge, 7th – 9th Sep 2015,

Santiago presented at the following conferences


October 2017, EuroDisplay 2017, Berlin (Germany), Poster- “Towards A Phase-Change Metamaterial CMY Subtractive Display” (authors: Santiago Garcia-Cuevas-Carrillo, Liam Trimby, Peiman Hosseini, Harish Bhaskaran, C. David Wright)
September 2017, EPCOS 2017, Aachen (Germany), Poster- “Towards A Phase-Change Metamaterial CMY Subtractive Display” (authors: Santiago Garcia-Cuevas-Carrillo, Liam Trimby, Peiman Hosseini, Harish Bhaskaran, C. David Wright)


25th July, Meta 2016, Malaga (Spain), Poster- “Non-volatile optoelectronic phase-change metadisplays” (authors: Santiago Garcia-Cuevas Carrillo, C. David Wright, Peiman Hosseini, Harish Bhaskaran)


Santiago’s thesis abstract

This thesis is concerned with the design and development of dynamically reconfigurable optical metasurfaces. This reconfigurability is achieved by integrating chalcogenide phase-change materials with metal-insulator-metal metasurface absorbers. Switching the phase-change material between its amorphous and crystalline states results in dramatic changes in its optical properties, with consequent dramatic changes in the resonant behaviour of the plasmonic metasurface with which it is integrated. Moreover, such changes are non-volatile, reversible and potentially very fast, in the order of nanoseconds. The developed devices in this thesis have been designed to modulate the amplitude of the reflected light in the visible and the near-infrared part of the electromagnetic spectrum with application in reflective display technology and telecommunications.

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