Development of Functional Scanning Near-field Optical Microscope and Their Nano-scale Spectroscopy of Fine-particle Crystals

本文主要研究了扫描近场光学显微镜（SNOM）的纳米光谱学及其高功能化.聚苯乙烯微粒阵列晶体的近场效应。(1)当光波长穿过晶体的光子带共振时，SNOM透射图像被反转。这些图案是通过计算再现的。(2)SNOM图案类似于照明和收集模式，因为探针主要拾取平行于层的偏振分量。(3)SNOM模式变化剧烈，这取决于粒子半径，孔径大小的SNOM探针和光的波长。这一事实表明使用阵列晶体作为探针质量的标准度量的有效性。(4)在保持粒子间距不变的情况下，随着粒子尺寸的减小，光子带隙变窄。每个粒子的WG模式的粒子间重叠是必不可少的，如在形式 ...更多信息 2.电子乐队的选择。高功能性的开发（1）用石英振荡器代替激光器控制探针高度。(2)将SNOM装置置于低温恒温器中，在100 K下进行测量。(3)采用直光纤探针实现了偏振测量，并成功地应用于苝亚微米晶体的晶体取向测量。(4)实现了石英光纤的紫外测量和小刚度探针的柔性测量.光的纳米加工（1）用近场光照射在苝微晶表面形成直径小于100 nm、深度为几十nm的孔。由于表面激子的光激发，加速了表面上组成分子的解吸或解离，因此加工成为可能。(2)利用原子力显微镜研究了光处理后的时间形貌变化。表面分子的平均扩散速度约为2 ~ 3 nm/min。

Nano-scale spectroscopy of scanning near-field optical microscope (SNOM) and its high-functionality have been investigated as follows.1. Near-field effects on polystyrene fine-particle array crystals.(1) SNOM transmission images were reversed as the wavelength of light crossed the photonic-band resonance of the crystal. The patterns were reproduced by calculation.(2) The SNOM patterns resembled both for illumination and collection modes since the probe mainly picked up the polarization component parallel to the layer.(3) The SNOM patterns varied drastically depending on the particle radius, aperture size of SNOM probe and wavelength of light. This fact indicates the effectiveness of using the array crystal as a standard measure of the quality of the probe.(4) The bandwidth of the photonic bands becomes narrow as the particle size reduces with keeping the same inter-particle distance. The inter-particle overlapping of the WG modes of each particle is essential as in the case of the form … More ation of electronic bands.2. Development of high functionality(1) Quartz oscillator was used to control the probe height instead of laser control.(2) SNOM apparatus was put in a cryostat and the measurement was done at 100K.(3) A straight fiber probe made possible the polarization measurement and successively applied for the measurement of crystal orientation of sub-micron crystals of perylene.(4) UV measurements with use of silica fiber and flexible measurements with using the probes of small stiffness constant were both realized.3. Nano-scale processing by light(1) Holes of less than 100nm in diameter and a few tens of nm in depth were made by irradiation of near-field light on the surface of perylene microcrystals. The processing became possible due to the photo-excitation of surface excitons, that accelerate the desorption or dissociation of constituent molecules on the surface.(2) Temporal topographic change after the photo-processing was investigated by AFM. Average diffusion speed of the surface molecules were about 2〜3nm/min. Less