SFB 1238 | September 14, 16:00

Ultrafast optical-to-electrical conversion in graphene investigated by on-chip THz spectroscopy

Norio Kumada/ NTT Basic Research Labs Japan

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



room 0.03
Contact: Erwann Boquillon