Now showing items 1-18 of 18

    • Direct observation of ultraslow hyperbolic polariton propagation with negative phase velocity 

      Yoxall, Edward; Schnell, Martin; Nikitin, Alexey Y.; Txoperena, Oihana; Woessner, Achim; Lundeberg, Mark B.; Casanova, Félix; Hueso, Luis E.; Koppens, Frank H. L.; Hillenbrand, Rainer (Nature Publishing Group, 2015-09-14)
      Article
      Restricted access - publisher's policy
      Polaritons with hyperbolic dispersion are key to many emerging photonic technologies, including subdiffraction imaging, sensing and spontaneous emission engineering1, 2, 3, 4, 5, 6, 7, 8. Fundamental to their effective ...
    • Electrical control of optical emitter relaxation pathways enabled by graphene 

      Tielrooij, K. J.; Orona, L.; Ferrier, A.; Badioli, M.; Navickaite, G.; Coop, S.; Nanot, S.; Kalinic, B.; Cesca, T.; Gaudreau, L.; Ma, Q.; Centeno, A.; Pesquera, A.; Zurutuza, A.; Riedmatten, H. de; Goldner, P.; García de Abajo, Francisco Javier; Jarillo-Herrero, P.; Koppens, Frank H. L. (Nature Publishing Group, 2015-01-19)
      Article
      Open Access
      Controlling the energy flow processes and the associated energy relaxation rates of a light emitter is of fundamental interest and has many applications in the fields of quantum optics, photovoltaics, photodetection, ...
    • 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 ...
    • Extraordinary linear dynamic range in laser-defined functionalized graphene photodetectors 

      Sanctis, Adolfo De; Jones, Gareth F.; Wehenkel, Dominique J.; Bezares, Francisco; Koppens, Frank H. L.; Craciun, Monica F.; Russo, Saverio (Science, 2017-05-26)
      Article
      Open Access
      Graphene-based photodetectors have demonstrated mechanical flexibility, large operating bandwidth, and broadband spectral response. However, their linear dynamic range (LDR) is limited by graphene’s intrinsic hot-carrier ...
    • Fast and sensitive terahertz detection using an antenna-integrated graphene pn-junction 

      Castilla, Sebastián; Terrés, Bernat; Autore, Marta; Viti, Leonardo; Li, Jian; Nikitin, Alexey Y.; Vangelidis, Ioannis; Watanabe, Kenji; Taniguchi, Takashi; Lidorikis, Elefterios; Vitiello, Miriam S.; Hillenbrand, Rainer; Tielrooij, Klaas-Jan; Koppens, Frank H. L. (ACS, 2019-03-18)
      Article
      Open Access
      Although the detection of light at terahertz (THz) frequencies is important for a large range of applications, current detectors typically have several disadvantages in terms of sensitivity, speed, operating temperature, ...
    • Generation of photovoltage in graphene on a femtosecond timescale through efficient carrier heating 

      Tielrooij, K. J.; Piatkowski, L.; Massicotte, M.; Woessner, Achim; Ma, Q.; Lee, Y.; Myhro, K. S.; Lau, C. N.; Jarillo-Herrero, P.; Hulst, N. F. van; Koppens, Frank H. L. (Nature, 2015-04-13)
      Article
      Open Access
      Graphene is a promising material for ultrafast and broadband photodetection. Earlier studies have addressed the general operation of graphene-based photothermoelectric devices and the switching speed, which is limited by ...
    • High Quality Factor Mechanical Resonators Based on WSe2 Monolayers 

      Morell, Nicolas; Reserbat-Plantey, Antoine; Tsioutsios, Ioannis; Schädler, Kevin Gerd; Dubin, François; Koppens, Frank H. L.; Bachtold, Adrian (ACS, 2016-07-26)
      Article
      Open Access
      Suspended monolayer transition metal dichalcogenides (TMD) are membranes that combine ultralow mass and exceptional optical properties, making them intriguing materials for opto-mechanical applications. However, the low ...
    • Highly confined low-loss plasmons in graphene–boron nitride heterostructures 

      Woessner, Achim; Lundeberg, Mark B.; Gao, Yuanda; Principi, Alessandro; Alonso-González, Pablo; Carrega, Matteo; Watanabe, Kenji; Taniguchi, Takashi; Vignale, Giovanni; Polini, Marco; Hone, James; Hillenbrand, Rainer; Koppens, Frank H. L. (Nature Publishing Group, 2014-12-22)
      Article
      Open Access
      Graphene plasmons were predicted to possess simultaneous ultrastrong field confinement and very low damping, enabling new classes of devices for deep-subwavelength metamaterials, single-photon nonlinearities, extraordinarily ...
    • Hot-carrier photocurrent effects at graphene–metal interfaces 

      Tielrooij, K. J.; Massicotte, M.; Piatkowski, L.; Woessner, Achim; Ma, Q.; Jarillo-Herrero, P.; Hulst, N. F. van; Koppens, Frank H. L. (IOP, 2015-03-02)
      Article
      Open Access
      Photoexcitation of graphene leads to an interesting sequence of phenomena, some of which can be exploited in optoelectronic devices based on graphene. In particular, the efficient and ultrafast generation of an electron ...
    • Interface Engineering in Hybrid Quantum Dot–2D Phototransistors 

      Kufer, Dominik; Lasanta, Tania; Bernechea, Maria; Koppens, Frank H. L.; Konstantatos, Gerasimos (ACS, 2016-05-31)
      Article
      Open Access
      The hybridization of two-dimensional transition metal dichalcogenides (TMDCs) with colloidal quantum dots (QDs) has been demonstrated to be an ideal platform for low dark-current and highly sensitive photodetection due to ...
    • Plasmonic antenna coupling to hyperbolic phonon-polaritons for sensitive and fast mid-infrared photodetection with graphene 

      Castilla Gómez, Manuel Sebastián; Vangelidis, Ioannis; Pusapati, Varun Varma; Goldstein, Jordan; Autore, Marta; Slipchenko, Tetiana; Rajendran, Khannan; Kim, Seyoon; Watanabe, K.; Taniguchi, T.; Martín Moreno, Luis; Englund, Dirk; Tielrooij, Klaas-Janer; Hillenbrand, Rain; Lidorikis, Elefterios; Koppens, Frank H. L. (2020-12)
      Article
      Open Access
      Integrating and manipulating the nano-optoelectronic properties of Van der Waals heterostructures can enable unprecedented platforms for photodetection and sensing. The main challenge of infrared photodetectors is to ...
    • 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 ...
    • Real-space mapping of tailored sheet and edge plasmons in graphene nanoresonators 

      Nikitin, A. Y.; Alonso-González, P.; Vélez, S.; Mastel, S.; Centeno, A.; Pesquera, A.; Zurutuza, A.; Casanova, F.; Hueso, L. E.; Koppens, Frank H. L.; Hillenbrand, R. (2016-03-21)
      Article
      Open Access
      Plasmons in graphene nanoresonators have many potential applications in photonics and optoelectronics, including room-temperature infrared and terahertz photodetectors, sensors, reflect arrays or modulators1, 2, 3, 4, 5, ...
    • Spatiotemporal imaging of 2D polariton wave packet dynamics using free electrons 

      Kurman, Yaniv; Dahan, Raphael; Shenfux, Hanan Herzig; Wang, Kangpeng; Yannai, Michael; Adiv, Yuval; Reinhardt, Ori; Tizei, Luiz H. G.; Woo, Steffi Y.; Li, Jiahan; Edgar, James H.; Kociak, Mathieu; Koppens, Frank H. L.; Kaminer, Ido (AAAS, 2021-06-11)
      Article
      Open Access
    • Thermoelectric detection and imaging of 1 propagating graphene plasmons 

      Lundeberg, Mark B.; Gao, Yuanda; Woessner, Achim; Tan, Cheng; Alonso-González, Pablo; Watanabe, Kenji; Taniguchi, Takashi; Hone, James; Hillenbrand, Rainer; Koppens, Frank H. L. (Nature, 2016-09-19)
      Article
      Open Access
      Controlling, detecting and generating propagating plasmons by all-electrical means is at the heart of on-chip nano-optical processing1, 2, 3. Graphene carries long-lived plasmons that are extremely confined and controllable ...
    • Ultrafast electronic readout of diamond nitrogen-vacancy centres coupled to graphene 

      Brenneis, Andreas; Gaudreau, Louis; Seifert, Max; Karl, Helmut; Brandt, Martin S.; Huebl, Hans; Garrido, Jose A; Koppens, Frank H. L.; Holleitner, Alexander W. (Nature Publishin group, 2014-12-01)
      Article
      Open Access
      Non-radiative transfer processes are often regarded as loss channels for an optical emitter1 because they are inherently difficult to access experimentally. Recently, it has been shown that emitters, such as fluorophores ...
    • Ultrafast electronic readout of diamond nitrogen–vacancy centres coupled to graphene 

      Brenneis, Andreas; Gaudreau, Louis; Seifert, Max; Karl, Helmut; Brandt, Martin S.; Huebl, Hans; Garrido, Jose A.; Koppens, Frank H. L.; Holleitner, Alexander W. (Nature Publishing Group, 2014-12-01)
      Article
      Open Access
      Non-radiative transfer processes are often regarded as loss channels for an optical emitter1 because they are inherently difficult to access experimentally. Recently, it has been shown that emitters, such as fluorophores ...
    • Ultrafast nonlinear optical response of Dirac fermions in graphene 

      Baudisch, Matthias; Marini, Andrea; Cox, Joel D.; Zhu, Tony; Silva, Francisco; Teichmann, Stephan; Massicotte, Mathieu; Koppens, Frank H. L.; Levitov, Leonid S.; García de Abajo, Francisco Javier; Biegert, Jens (Nature, 2018-03-09)
      Article
      Open Access
      The speed of solid-state electronic devices, determined by the temporal dynamics of charge carriers, could potentially reach unprecedented petahertz frequencies through direct manipulation by optical fields, consisting ...