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Weak and strong field control of valley polarization in WSe2 monolayer
https://repo.qst.go.jp/records/86174
https://repo.qst.go.jp/records/86174b47ca4a7-a297-4a49-8533-107d5ef0c52a
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-12-01 | |||||
| タイトル | ||||||
| タイトル | Weak and strong field control of valley polarization in WSe2 monolayer | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Hashmi, Arqum
× Hashmi, Arqum× Yamada, Shunsuke× Yamada, Atsushi× Kazuhiro, Yabana× Tomohito, Otobe× Hashmi, Arqum× Kazuhiro, Yabana× Tomohito, Otobe |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We theoretically demonstrate the control of valley pseudospin in WSe2 monolayer by single-cycle linearly polarized laser pulse. The asymmetric electric field controlled by the carrier-envelope phase is used to induce the valley polarization. We have investigated the single cycle pulse control of valley pseudospin in the WSe2 monolayer. Valley polarization remains zero within the linear optical limit for both polarization directions. In the nonlinear regime, the polarization parallels to the zigzag direction experience strong asymmetries. The valley polarization is robust against field strength but it strongly depends on the CEP. We showed that in the strong-field regime the electron dynamics display quantum interference that gives rise to distinct node formation. The position of the carrier density is strongly dependent on laser intensity which indicates the possibility to control the electron momentum in BZ. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | CLEO-2022 | |||||
| 発表年月日 | ||||||
| 日付 | 2021-11-30 | |||||
| 日付タイプ | Issued | |||||
