Abstract
By means of THz pump and optical probe spectroscopy, we observed that the incident THz pulse induces a strong spectral modulation of the 1s heavy-hole exciton peak of GaAs quantum wells due to Rabi splitting. Our precise measurements in the time domain show that the Rabi splitting follows the instantaneous THz electric pulse at extremely strong fields but persists up to a negative delay time of ∼1 ps at weak fields. This field dependent dynamics of the Rabi splitting indicates that the excitonic field ionization governs a nonperturbative nonlinear dynamics of excitons by causing a reduction of the dephasing time.
Original language | English |
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Title of host publication | Ultrafast Phenomena and Nanophotonics XIX |
Publisher | SPIE |
Volume | 9361 |
ISBN (Print) | 9781628414516 |
DOIs | |
Publication status | Published - 2015 |
Event | Ultrafast Phenomena and Nanophotonics XIX - San Francisco, United States Duration: 2015 Feb 8 → 2015 Feb 11 |
Other
Other | Ultrafast Phenomena and Nanophotonics XIX |
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Country | United States |
City | San Francisco |
Period | 15/2/8 → 15/2/11 |
Keywords
- Exciton
- Nonlinear optics
- Quantum well
- THz spectroscopy
- Ultrafast phenomena
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics