ICFO is a young research institution that aims to advance the very limits of knowledge in Photonics, namely the science and technology of harnessing Light. Light, especially laser light, is one of the major enabling technologies currently available to humankind. Our research thrusts target the global forefront of photonics, and aim to tackle important challenges faced by society at large. We focus on current and future problems in Health, Energy, Information, Safety, Security and caring for the Environment.

Recent Submissions

  • Cerebral and systemic physiological effects of wearing face masks in young adults 

    Fischer, Jonas B.; Frisk, Lisa Kobayashi; Scholkmann, Felix; Delgado-Mederos, Raquel; Mayos, Mercedes; Durduran, Turgut (National Academy of Sciences of the United States of America, 2021-10-12)
    Article
    Open Access
    The COVID-19 pandemic led to widespread mandates requiring the wearing of face masks, which led to debates on their benefits and possible adverse effects. To that end, the physiological effects at the systemic and at the ...
  • Quantum surface-response of metals revealed by acoustic graphene plasmons 

    Gonçalves, P. A. D.; Christensen, Thomas; Peres, Nuno M. R; Jauho, Antti-Pekka; Epstein, Itai; Koppens, Frank H. L.; Soljačić, Marin; Mortensen, N. Asger (Nature, 2021-06-01)
    Article
    Open Access
    A quantitative understanding of the electromagnetic response of materials is essential for the precise engineering of maximal, versatile, and controllable light–matter interactions. Material surfaces, in particular, are ...
  • Ag2ZnSnS4 Nanocrystals Expand the Availability of RoHS Compliant Colloidal Quantum Dots 

    Saha, Avijit; Figueroba, Alberto; Konstantatos, Gerasimos (ACS, 2020-02-06)
    Article
    Open Access
    The demonstration of the quantum confinement effect in colloidal quantum dots (QDs) has been extensively studied and exploited mainly in Pb and Cd chalcogenide systems. There has been an urgent need recently for ...
  • Low-Cost RoHS Compliant Solution Processed Photovoltaics Enabled by Ambient Condition Synthesis of AgBiS2 Nanocrystals 

    Akgul, M. Zafer; Figueroba, Alberto; Pradhan, Santanu; Bi, Yu; Konstantatos, Gerasimos (ACS, 2020-03-04)
    Article
    Open Access
    Two major challenges exist before colloidal nanocrystal solar cells can take their place in the market: So far, these devices are based on Pb/Cd-containing nanocrystals, and second, the synthesis of these nanocrystals takes ...
  • Solid-State Thin-Film Broadband Short-Wave Infrared Light Emitters 

    Pradhan, Santanu; Dalmases, Mariona; Konstantatos, Gerasimos (2020-09-30)
    Article
    Open Access
    Solid-state broadband light emitters in the visible have revolutionized today's lighting technology achieving compact footprints, flexible form factors, long lifetimes, and high energy saving, although their counterparts ...
  • Electrical tunability ofterahertz nonlinearity in graphene 

    Kovalev, Sergey; Hafez, Hassan A.; Tielrooij, Klass-Jan; Deinert, Jan-Christoph; Ilyakov, Igor; Awari, Nilesh; Alcaraz, David; Soundarapandian, Karuppasamy; Saleta, David; Germanskiy, Semyon; Chen, Min; Bawatna, Mohammed; Green, Bertram; Koppens, Frank H. L.; Mittendorff, Martin; Bonn, Mischa; Gensch, Michael; Turchinovich, Dmitry (Science, 2021-04-07)
    Article
    Open Access
    Graphene is conceivably the most nonlinear optoelectronic material we know. Its nonlinear optical coefficients in the terahertz frequency range surpass those of other materials by many orders of magnitude. Here, we show ...
  • Controlling mid-infrared plasmons in graphene nanostructures through post-fabrication chemical doping 

    Paulillo, Bruno; Bareza, Nestor Jr; Pruneri, Valerio (IOP, 2021-05-07)
    Article
    Open Access
    Engineering the doping level in graphene nanostructures to yield controlled and intense localized surface plasmon resonance (LSPR) is fundamental for their practical use in applications such as molecular sensing for point ...
  • Colloidal synthesis of lead-free Cs2TiBr6−xIx perovskite nanocrystals 

    Liga, Shanti Maria; Konstantatos, Gerasimos (RSC, 2021-08-06)
    Article
    Open Access
    Cesium titanium halide perovskites are novel lead-free optoelectronic materials that have attracted attention in the last two years for their application in solar cells with power conversion efficiencies reaching 3.3%. We ...
  • Colloidal AgBiS2 nanocrystals with reduced recombination yield 6.4% power conversion efficiency in solution-processed solar cells 

    Burgués-Ceballos, Ignasi; Wang, Yongjie; Akgul, M. Zafer; Konstantatos, Gerasimos (Elsevier, 2020-05-28)
    Article
    Open Access
    AgBiS2 nanocrystals have recently emerged as a RoHS compliant material for photovoltaics. This heavy-metal-free ternary chalcogenide can be prepared from earth-abundant precursors, is solution-processable and presents a ...
  • Cation Disorder and Local Structural Distortions in AgxBi1–xS2 Nanoparticles 

    Kesavan, Jagadesh Kopula; d’Acapito, Francesco; Scardi, Paolo; Stavrinadis, Alexandros; Akgul, Mehmet Zafer; Burgués-Ceballos, Ignasi; Konstantatos, Gerasimos; Boscherini, Federico (MDPI, 2020-02-12)
    Article
    Open Access
    By combining X-ray absorption fine structure and X-ray diffraction measurements with density functional and molecular dynamics simulations, we study the structure of a set of AgxBi1−xS2 nanoparticles, a materials system ...
  • Ag2ZnSnS4–ZnS core–shell colloidal quantum dots: a near-infrared luminescent material based on environmentally friendly elements 

    Saha, Avijit; Konstantatos, Gerasimos (RSC, 2021-05-07)
    Article
    Open Access
    Low cost, multinary colloidal quantum dots (QDs) based on environmentally friendly elements, with bright, narrow-width, tunable near-infrared (NIR) luminescence are promising alternatives to Cd and Pb chalcogenide QDs for ...
  • Laser-induced electron diffraction of the ultrafast umbrella motion in ammonia 

    Belsa, B.; Amini, K.; Liu, X.; Sánchez, A.; Steinle, T.; Steinmetzer, J.; Le, A. T.; Moshammer, R.; Pfeifer, T.; Ullrich, J.; Moszynski, R.; Lin, C. D.; Grafe, S.; Biegert, J. (AIP, 2021-01-13)
    Article
    Open Access
    Visualizing molecular transformations in real-time requires a structural retrieval method with Ångström spatial and femtosecond temporal atomic resolution. Imaging of hydrogen-containing molecules additionally requires an ...

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