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  • Dr. Allan Stewart Johnson

    Position: Assistant Research Prof. (tenure track)
    Research: Ultrafast Science of Quantum Materials
    ORCID: 0000-0002-0711-708X
    Google Scholar profile: https://scholar.google.co.uk/citations?user=r79SSoYAAAAJ
    Joining Date: January, 2023
    User Name: allan.johnson
    Stewart Johnson

    Dr. Johnson joined IMDEA Nanociencia as a “Ramon y Cajal” Assistant Research Professor in 2023, heading the Ultrafast Science of Quantum Materials group. Prior to that he was based at ICFO – The Institute of Photonic Science in Barcelona, where he was a “La Caixa” Junior Leader at from 2021-2022, and a PROBIST Marie Curie postdoctoral fellow from 2018-2021. He completed his PhD on tabletop attosecond x-ray laser sources at Imperial College London in 2017, where he was a Marie Curie doctoral fellow and NSERC PGS award holder, and his B.Sc. In Physics-Mathematics at the University of Ottawa in 2013.


  • Dr. Arnab Sarkar

    Position: Postdoctoral Researcher
    ORCID: 0000-0002-5348-0699
    Google Scholar profile: https://scholar.google.com/citations?user=Vbl4fRkAAAAJ
    Joining Date: 2023
    User Name: arnab.sarkar

    Arnab joined the USQM group as a post-doctoral fellow in July 2023, following the completion of his doctoral thesis titled "Classical Discrete Time Crystal" at the Indian Institute of Technology Kanpur. His doctoral work focused on the mechanical properties of NEMS and MEMS. He completed his MSc (2015 -2017) at the Indian Institute of technology Bombay and BSc (2012-2017) at Ramakrishna Mission Vidyamandira.


  • María Recasens Esparraguera

    Position: PhD Researcher
    Research: Ultrafast Science of Quantum Materials
    ORCID: 0000-0002-1134-3901
    Recasens Esparraguera

    Maria graduated in Physics at Universitat de Barcelona in 2021. She got a Master in Quantum Science and Technology in a joint program from Universiat de Barcelona, Universitat Autònoma de Barcelona and Universitat Politècnica de Barcelona in 2022. During her master she worked with light induced superconductivity and coherent control at ICFO.  Since October of 2022 she is a PhD student based at ICFO in the group of Maciej Lewenstein and co-supervised by Dr. Johnson at IMDEA.

  • Shreya Bagchi

    Position: PhD Researcher
    Joining Date: July 2023
    User Name: shreya.bagchi

    Shreya obtained her B.Sc. degree in physics at Ravenshaw University (India) and her M.Sc. degree in Physics with a specialisation in Laser Physics at Pondicherry University (India). Prior to joining IMDEA Nanociencia, she had experience working in the field of laser cooling of neutral atoms while she was at the Raman Research Institute, India. She joined IMDEA Nanociencia in July 2023 as a PhD student to study photoinduced phase transitions and non-linear optics in quantum materials. When not in the lab, she likes to read novels and paint.