TY - JOUR
T1 - Detection of both optical polarization and coherence transfers to excitonic valley states in CVD-grown monolayer MoS2
AU - Asakura, Eito
AU - Suzuki, Masaki
AU - Karube, Shutaro
AU - Nitta, Junsaku
AU - Nagashio, Kosuke
AU - Kohda, Makoto
N1 - Publisher Copyright:
© 2019 The Japan Society of Applied Physics.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - We experimentally demonstrate the generation and detection of both excitonic valley polarization and coherence in CVD-grown monolayer MoS2 under nearly resonant excitation in polarized photoluminescence. By circular and linear photoexcitation close to the A-exciton energy, where the excitation energy is 37 meV above the A-exciton energy, 54% and 32% of valley polarization and coherence, respectively, are observed at T = 20 K. By tuning the optical polarization and the polarization plane of photoexcitation, valley polarization and its coherence are systematically controlled. This indicates the coherent control of an excitonic valley two-level system, an important step for valley quantum information.
AB - We experimentally demonstrate the generation and detection of both excitonic valley polarization and coherence in CVD-grown monolayer MoS2 under nearly resonant excitation in polarized photoluminescence. By circular and linear photoexcitation close to the A-exciton energy, where the excitation energy is 37 meV above the A-exciton energy, 54% and 32% of valley polarization and coherence, respectively, are observed at T = 20 K. By tuning the optical polarization and the polarization plane of photoexcitation, valley polarization and its coherence are systematically controlled. This indicates the coherent control of an excitonic valley two-level system, an important step for valley quantum information.
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U2 - 10.7567/1882-0786/ab21a8
DO - 10.7567/1882-0786/ab21a8
M3 - Article
AN - SCOPUS:85069499436
VL - 12
JO - Applied Physics Express
JF - Applied Physics Express
SN - 1882-0778
IS - 6
M1 - 063005
ER -