Generation and control of time-reversal-symmetry-broken quantum systems by vector electric-field shaped pulses

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H02117
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Kazuhiko Misawa 東京農工大学, 工学(系)研究科(研究院), 教授 (80251396)
• Co-Investigator(Kenkyū-buntansha): 香取 浩子 東京農工大学, 工学(系)研究科(研究院), 教授 (10211707) ; 野村 晋太郎 筑波大学, 数理物質系, 准教授 (90271527) ; 佐藤 正寛 茨城大学, 理学部, 准教授 (90425570) ; 岡 隆史 大阪大学, 理学(系)研究科(研究院), 研究員 (50421847)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ベクトル波形整形 / キラリティ電磁場 / エンベロープヘリシティ / 時間反転対称性の破れ / 半導体中キャリアのTHz応答 / 二次元電子系 / 時間分解偏光分光法

Outline of Final Research Achievements

We have worked on improvement of vectorial electric field waveform shaping technology and established it as a light source useful for control of chirality-induced quantum systems. To use high pulse energies, we developed a vectorial electric field waveform shaping apparatus using a diffraction grating pair and a Michelson interferometer.
We tried to measure and control the carrier dynamics of the two dimensional electron system under irradiation of the vector-field shaped pulses. Inversion of the direction in photo-current was observed by changing the envelope helicity of the incident pulses.
We consider that this is a successful demonstaration of control in two-dimensional electron system by vector-field shaped pulses proposed in this research plan.

Free Research Field

超高速光科学、量子エレクトロニクス、光物性物理学