Development of Nanoscale Laser Spectroscopy Based on Photon STM for the Study of Semiconductor Mesoscopic Systems

开发基于光子 STM 的纳米级激光光谱用于半导体介观系统的研究

基本信息

批准号：
07554007
负责人：
ITOH Tadashi
金额：
$ 13.7万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

The aim of this project is to ascertain the validity of photon STM (Scanning Near-field Optical Microscope, SNOM) by making AFM/SNOM instruments with cantilever-type optical fiber probe, which can be used in vacuum and also at low temperature. As a typical sample for SNOM measurement, we have adopted the layr of polystirene particles (LATEX) which are self-organized two-dimensionally on a glass plate.1) Transmission and luminescence excitation images of LATEX layrs by the use of the illumination mode have been measured. Electromagnetic waves propagating both along and perpendicular to the layr plane with some preferable propagation directions are observed. The SNOM images are found to be dependent on the wavelength of the laser light and expected to reveal some properties about photonic band effect in this 2D periodic material. The same images are found both in the illumination and the collection modes for the optical probe operation and the time-reversal theorem in this system has been discussed together with theoretical expectation.2) For atomic force detection, we have applied tuning fork technique without suffering from a stray light coming from the laser used for sensing the fiber vibration. Clear images similar to the conventional one are obtained and the quartz detection is found to work at very low temperatures in vacuum.3) SNOM images of assembled semiconductor nanoparticles with photon energy at some electronic resonance condition have been theoretically investigated under the scheme of nonlocal optical response theory by taking into account both the resonant and nonresonant contributions of the induced polarization. The SNOM images are found to be dependent on the operation modes of the fiber probe due to the configuration resonance effect.These results demonstrate the validity of the photon STM (SNOM) for the optical measurement of single or assembled nanoparticles of semiconductors in submicrometer scale.

该项目的目的是通过制造具有悬臂型光纤探针的AFM/SNOM仪器来确定光子STM（扫描近场光学显微镜，SNOM）的有效性，该仪表可用于真空和低温。作为SNOM测量的典型样品，我们采用了通过使用照明模式的乳胶外行的透射和发光激发图像进行了二维和发光激发图像。观察到具有一些优选传播方向的电磁波沿沿Layr平面传播和垂直于Layr平面。发现SNOM图像取决于激光光的波长，并有望在此2D周期材料中揭示有关光子带效应的某些特性。在照明和光学探针操作的收集模式中都找到了相同的图像，并且该系统中的时间反转定理已与理论期望一起讨论。2）对于原子力检测，我们已经应用了调谐叉技术，而没有从激光中遇到的散射光，用于感应光纤振动。获得了与常规图像相似的清晰图像，并且发现石英检测在真空中的温度非常低。3）在某些电子谐振条件下具有光子能量的组装半导体纳米粒子的鼻声图像在理论上已经在非局部光学响应理论的方面进行了研究，该方案是通过双向互联剂和非互联剂的非局部性响应理论进行了研究。发现SNOM图像因构型共振效果而取决于纤维探针的操作模式。这些结果证明了光子尺度中半导体的单个或组装的纳米颗粒的光子STM（SNOM）的有效性。