Ultrafast femtosecond laser control of electron dynamics in two-dimensional strong spin-orbit coupling materials
二维强自旋轨道耦合材料中电子动力学的超快飞秒激光控制
基本信息
- 批准号:22K13991
- 负责人:
- 金额:$ 2.41万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Early-Career Scientists
- 财政年份:2022
- 资助国家:日本
- 起止时间:2022-04-01 至 2024-03-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
By using Time-dependent density functional theory (TDDFT) based on the Maxwell-TDDFT scheme, the combined classical Maxwell plus time-dependent Kohn-Sham (TDKS) equations are used to describe the propagation of electromagnetic fields. Regarding the ultrafast electron dynamics in 2D layers of Transition metal dichalcogenides, I investigated the carrier dynamics in terms of valley polarization in WSe2 monolayer via single and two-color laser field.The valley selection rules suggest that linearly polarized light couples equally to both valleys and valley polarization cannot be achieved by a linearly polarized field. My study is focused on the above-mentioned argument and we aimed to induce valley asymmetry by linearly polarized pulses which are considered not achievable by a linearly polarized field.It is possible to create an asymmetric laser field by mixing a fundamental frequency and its second harmonic. The two pulses intensity ratio and the relative carrier-envelope phase (CEP) control the valley polarization. I compared the valley polarization results of two-color laser scheme results with the single color pulse. I found that the valley polarization via two-color control exceeds the single-color scheme by 1.2 times as the two-colors field exhibits more asymmetry in its temporal shape. The results reveal a convenient new path toward the optical control of valley pseudospins.
采用基于Maxwell-TDDFT格式的含时密度泛函理论(TDDFT),将经典的麦克斯韦方程和含时Kohn-Sham(TDKS)方程相结合,描述电磁场的传播.关于过渡金属二硫族化合物二维层中的超快电子动力学,研究了WSe 2单分子层中谷极化的载流子动力学,谷选择规则表明线偏振光与谷相等耦合,线偏振光不能实现谷极化.本论文的研究就是围绕上述论点展开的,我们的目标是利用线偏振脉冲诱导出线偏振场无法实现的谷值不对称性,通过将基频光与其二次谐波混合,可以产生非对称激光场。两个脉冲的强度比和相对载波包络相位(CEP)控制谷偏振。将双色激光方案的谷偏振结果与单色激光方案的谷偏振结果进行了比较。我发现通过双色控制的谷偏振超过单色方案的1.2倍,因为双色场在其时间形状上表现出更多的不对称性。结果揭示了一个方便的新途径的谷赝自旋的光学控制。
项目成果
期刊论文数量(7)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Weak and Strong Field Control of Valley Polarization in WSe2 Monolayer
WSe2单层谷极化的弱场和强场控制
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Takanobu Kirihara;Hajime Susa;Takashi Hosokawa;Tomoya Kinugawa;Hashmi Arqum
- 通讯作者:Hashmi Arqum
Optical Field Control of Electron Dynamics in WSe2 Monolayer
WSe2 单层电子动力学的光场控制
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Takanobu Kirihara;Hajime Susa;Takashi Hosokawa;Tomoya Kinugawa;Hashmi Arqum;Hashmi Arqum
- 通讯作者:Hashmi Arqum
Valley selective excitations in WSe2 monolayer by (ω+2ω) pulses
(ω+2ω) 脉冲对 WSe2 单层的谷选择性激发
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Takanobu Kirihara;Hajime Susa;Takashi Hosokawa;Tomoya Kinugawa;Hashmi Arqum;Hashmi Arqum;Hashmi Arqum;Hashmi Arqum
- 通讯作者:Hashmi Arqum
Sub-cycle control of valley polarization in WSe2 monolayer
WSe2单层谷极化的子循环控制
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Takanobu Kirihara;Hajime Susa;Takashi Hosokawa;Tomoya Kinugawa;Hashmi Arqum;Hashmi Arqum;Hashmi Arqum
- 通讯作者:Hashmi Arqum
Valley polarization in WSe2 monolayer: CEP control of ω and ω+2ω Pulses
WSe2 单层中的谷极化:ω 和 ω+2ω 脉冲的 CEP 控制
- DOI:
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Takanobu Kirihara;Hajime Susa;Takashi Hosokawa;Tomoya Kinugawa;Hashmi Arqum;Hashmi Arqum;Hashmi Arqum;Hashmi Arqum;Hashmi Arqum
- 通讯作者:Hashmi Arqum
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Hashmi Arqum其他文献
Graphene-based Symmetric and Non-Symmetric Magnetoresistive Junctions
基于石墨烯的对称和非对称磁阻结
- DOI:
10.7566/jpsj.89.034708 - 发表时间:
2020 - 期刊:
- 影响因子:1.7
- 作者:
Hashmi Arqum;Nakanishi Kenta;Ono Tomoya - 通讯作者:
Ono Tomoya
空間制御に基づくグラフェンナノリボンの精密合成と機能開拓
基于空间控制的石墨烯纳米带的精准合成与功能开发
- DOI:
- 发表时间:
2020 - 期刊:
- 影响因子:0
- 作者:
Farooq M. Umar;Hashmi Arqum;Ono Tomoya;Huang Li;Kaneko Hiromasa;北尾 岳史 - 通讯作者:
北尾 岳史
Spin reorientation transition of Fe/FeCo/Cu(001) and Fe/FeCo/Co/Cu(001)
Fe/FeCo/Cu(001) 和 Fe/FeCo/Co/Cu(001) 的自旋重取向转变
- DOI:
10.1016/j.jmmm.2013.05.004 - 发表时间:
2013 - 期刊:
- 影响因子:2.7
- 作者:
Dongyoo Kim;Hashmi Arqum;Jisang Hong - 通讯作者:
Jisang Hong
Hashmi Arqum的其他文献
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{{ truncateString('Hashmi Arqum', 18)}}的其他基金
Two Dimensional Magnetic Material: Spintronics & Valleytronics Applications
二维磁性材料:自旋电子学
- 批准号:
19K15381 - 财政年份:2019
- 资助金额:
$ 2.41万 - 项目类别:
Grant-in-Aid for Early-Career Scientists
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会议:第三届美国 TDDFT 理论与应用学校及研讨会
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