Nanometer scale real-time mapping of vibrations in pico second tempral region
皮秒颞区振动的纳米级实时测绘
基本信息
- 批准号:12305007
- 负责人:
- 金额:$ 27.84万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (A)
- 财政年份:2000
- 资助国家:日本
- 起止时间:2000 至 2001
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
In this research, we aim to develop a new microscope which has both nanometer spatial resolution and picosecond temporal resolution. It can be realized by the combination of the scanning probe microscope and the time-resolved measurement technique with ultrashort laser pulses. The former has the nanometer spatial resolution and the latter the picosecond temporal resolution. The combination of the ultra high speed optical switch with ultra short laser pulses and the scanning tunneling microscope has been already proposed along this way. It is proved, however, that the stray capacity between the sample and the microscope tip substantially reduces the spatial resolution when the tunnel current is switched very fast. As a way getting around the above problem, we propose a scanning probe microscope that detects ultrashort phonon pulses excited by ultrashort laser pulses.The ultrashort light pulses from a mode-locked Ti-sapphire laser are divided into two optical paths. An optical delay line is used to introduce a time difference of ± 1 ns between the pulses in two paths. The pulses passing each line are modulated with different frequencies. A metal thin film sample is irradiated by the modulated light pulses to generate the ultrashort acoustic phonon pulses. The generated periodic surface displacement is detected by the atomic force microscopy. We considered this method theoretically and did actual experiments. In addition, we did related studies of the technique to estimate the local elasticity with nanometer spatial resolution by the ultrasonic force microscope and of the ultra high frequency phonon generation by a semiconductor quantum well structure.
在本研究中,我们的目标是开发一种新的显微镜,同时具有纳米空间分辨率和皮秒时间分辨率。它可以通过扫描探针显微镜和超短激光脉冲时间分辨测量技术相结合来实现。前者具有纳米级的空间分辨率,后者具有皮秒级的时间分辨率。沿着提出了超短脉冲超高速光开关与扫描隧道显微镜的结合。然而,它被证明,样品和显微镜针尖之间的杂散电容大大降低了空间分辨率时,隧道电流切换非常快。为了解决上述问题,我们提出了一种扫描探针显微镜来探测超短激光脉冲激发的超短声子脉冲。使用光学延迟线在两路脉冲之间引入± 1 ns的时间差。通过每条线的脉冲被不同的频率调制。用调制光脉冲照射金属薄膜样品,产生超短声声子脉冲。所产生的周期性表面位移由原子力显微镜检测。我们从理论上考虑了这种方法,并进行了实际实验。此外,我们还对利用超声力显微镜以纳米空间分辨率估算局域弹性的技术和利用半导体量子阱结构产生超高频声子的技术进行了相关的研究。
项目成果
期刊论文数量(9)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
O. Matsuda: "Wavelength selective photoexcitation of picosecond aboustic-phonon pulses in a triple GaAs/Al_<0.3>Ga_<0.7>As quantum well structure"Physica B. (in press). (2002)
O. Matsuda:“三重 GaAs/Al_<0.3>Ga_<0.7>As 量子阱结构中皮秒声学声子脉冲的波长选择性光激发”Physica B.(出版中)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
O.Matsuda: "Cantilever dynamics in ultrasonic force microscopy"Japanese Journal of Applied Physics. (in press). (2002)
O.Matsuda:“超声力显微镜中的悬臂动力学”日本应用物理学杂志。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
K.Inagaki: "Hysteresis of the cantilever snift in ultrasonic force microscopy"Applied Physics Letters. 80・12(in press). (2002)
K. Inagaki:“超声波力显微镜中悬臂嗅探的滞后”应用物理快报 80・12(印刷中)。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
O. Matsuda, I. Ishii, T. Fukui, J. J. Baumberg, O. B. Wright: "Wavelength selective photoexcitation of picosecond aboustic-phonon pulses in a triple GaAs/Al_<0.3>Ga_<0.7>As quantum well structure"Physica B.. (in press). (2002)
O. Matsuda、I. Ishii、T. Fukui、J. J. Baumberg、O. B. Wright:“三重 GaAs/Al_<0.3>Ga_<0.7>As 量子阱结构中皮秒声学声子脉冲的波长选择性光激发”Physica B..
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
O. Matsuda, T. Terada, K. Inagaki, O. B. Wright: "Cantileyer dynamics in ultra-sonic force microscopy"Japanese Journal of Applied Physics. (in press). (2002)
O. Matsuda、T. Terada、K. Inagaki、O. B. Wright:“超声波力显微镜中的悬臂动力学”日本应用物理学杂志。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
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MATSUDA Osamu的其他文献
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$ 27.84万 - 项目类别:
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$ 27.84万 - 项目类别:
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14205014 - 财政年份:2002
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$ 27.84万 - 项目类别:
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12650220 - 财政年份:2000
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$ 27.84万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Evaluation of local elasticity and inelasticity with nonoscale spatial resolution with scanning ultrasonic force microscope
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$ 27.84万 - 项目类别:
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07456089 - 财政年份:1995
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Grant-in-Aid for Scientific Research (B)
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