权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Elucidation and coherent control of excitonic states of carbon nanotubes

碳纳米管激子态的阐明和相干控制

基本信息

批准号：
21760038
负责人：
HIRORI Hideki
金额：
$ 2.66万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2010
项目状态：
已结题

项目摘要

Aim of this study is to elucidate excitonic states of single-walled carbon nanotubes (SWNTs) and to develop coherent control technique with the excitonic states. For this purpose, (1) we established the method to generate single-cycle THz pulses with amplitudes with exceeding 1MV/cm electric field. (2) By developing a THz nonlinear spectroscopic method, we observe excitonic ionization under strong THz pulse with Stark effect and dynamical Frantz-Keldysh effect for both ZnSe and GaAs quantum wells. Furthermore, (3) we demonstrated for the first time that the number of carriers of GaAs quantum wells is enhanced 103 times more by irradiation of the THz pulse, eventually which leading a bright near-infrared luminescence. (4) For study THz response of single SWNTs, we developed the THz near-field microscope. With the developed THz spectroscopic technique we continue the experiment for the THz coherent control of excitonic states.

本研究的目的是阐明单壁碳纳米管（SWNTs）的激子态，并发展激子态的相干控制技术。为此，（1）建立了产生单周期、幅值超过1 MV/cm的THz脉冲的方法。(2)通过发展一种THz非线性光谱方法，我们观测了ZnSe和GaAs量子威尔斯在强THz脉冲下的激子电离，并考虑了Stark效应和动力学Frantz-Keldysh效应。（3）首次证明了GaAs量子阱威尔斯的载流子数在THz脉冲的照射下增加了103倍，并最终产生了明亮的近红外发光。(4)为了研究单壁碳纳米管的太赫兹响应，我们研制了太赫兹近场显微镜。利用发展起来的太赫兹光谱技术，我们继续进行了激子态的太赫兹相干控制实验。