Now showing items 1-4 of 4

  • Observation of ultrafast free carrier dynamics in single layer MoS2 

    Cabo, Antonija; Miwa, Jill; Grønborg, Signe; Riley, Jonathon Mark; Johannsen, Jens; Cacho, Cephise; Alexander, Oliver; Chapman, Richard; Springate, Emma; Grioni, Marco; Lauritsen, Jeppe; King, Phil; Hofmann, Philip; Ulstrup, Søren (2015-09-09) - Journal item
    The dynamics of excited electrons and holes in single layer (SL) MoS2 have so far been difficult to disentangle from the excitons that dominate the optical response of this material. Here, we use time- and angle-resolved ...
  • Ramifications of optical pumping on the interpretation of time-resolved photoemission experiments on graphene 

    Ulstrup, Søren; Johannsen, Jens Christian; Cilento, Federico; Crepaldi, Alberto; Miwa, Jill A.; Zacchigna, Michele; Cacho, Cephise; Chapman, Richard T.; Springate, Emma; Fromm, Felix; Raidel, Christian; Seyller, Thomas; King, Phil D.C.; Parmigiani, Fulvio; Grioni, Marco; Hofmann, Philip (2015-04) - Journal article
    Abstract In pump-probe time and angle-resolved photoemission spectroscopy (TR-ARPES) experiments the presence of the pump pulse adds a new level of complexity to the photoemission process in comparison to conventional ...
  • Spin and valley control of free carriers in single-layer WS2 

    Ulstrup, Søren; Čabo, Antonija Grubišić; Riley, Jonathon M.; Dendzik, Maciej; Sanders, Charlotte E.; Bianchi, Marco; Cacho, Cephise; Matselyukh, Dan; Chapman, Richard T.; Springate, Emma; King, Phil D. C.; Miwa, Jill A.; Hofmann, Philip (2017-01-23) - Journal article
    The semiconducting single-layer transition metal dichalcogenides have been identified as ideal materials for accessing and manipulating spin- and valley-quantum numbers due to a set of favorable optical selection rules in ...
  • Ultrafast band structure control of a two-dimensional heterostructure 

    Ulstrup, Søren; Grubišić Čabo, Antonija; Miwa, Jill A; Riley, Jonathon Mark; Grønborg, Signe S; Johannsen, Jens C; Cacho, Cephise; Alexander, Oliver; Chapman, Richard T; Springate, Emma; Bianchi, Mario; Dendzik, Maciej; Lauritsen, Jeppe V; King, Philip David; Hofmann, Philip (2016-06-28) - Journal article
    The electronic structure of two-dimensional (2D) semiconductors can be signicantly altered by screening effects, either from free charge carriers in the material itself, or by environmental screening from the surrounding ...