Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines cond-mat
Date Mardi 20 Septembre 2022
Heure 13:30
Institut LPENS
Salle L357
Nom de l'orateur Kumada
Prenom de l'orateur Norio
Addresse email de l'orateur
Institution de l'orateur NTT Basic Research Laboratory
Titre Ultrafast optical-to-electrical conversion in graphene investigated by on-chip THz spectroscopy
Résumé Main subject I will talk is ultrafast photocurrent generation and transport in high-quality graphene photodetector. The current generated by femtosecond laser pulse through photo-thermoelectric effect was detected in time domain with the resolution of faster than 1 picosecond by on-chip THz spectroscopy. We could comprehensively understand how incident light is converted to electrical current in graphene, which is crucial information for developing ultrafast graphene optoelectronics. I will also briefly talk about two other subjects in our group: Growth and transport in InAs/InGaSb two-dimensional topological insulator, and Coherent transport of fractional quasiparticle at fractional-integer quantum Hall junction. Reference: Yoshioka, NK et al., Nature Photonics (accepted), arXiv:2203.05752
Numéro de preprint arXiv
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