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

扫描近场光学显微镜（SNOM）的纳米光谱及其高功能性研究如下。聚苯乙烯细粒子阵列晶体的近场效应。(1)当光的波长穿过晶体的光子带共振时，SNOM透射图像发生反转。通过计算再现了这些图案。(2)由于探针主要采集平行于层的偏振分量，因此SNOM模式在照明和采集模式上都很相似。(3)粒子半径、SNOM探针孔径大小和光波长对SNOM图形的影响较大。这一事实表明，使用阵列晶体作为测量探针质量的标准是有效的。(4)在保持粒子间距离不变的情况下，光子带的带宽随着粒子尺寸的减小而变窄。每个粒子的WG模式的粒子间重叠是必不可少的，就像在形式的情况下。(1)用石英振荡器代替激光控制测头高度。(2)将SNOM仪器放入低温恒温器中，在100K下进行测量。(3)直纤维探针使偏振测量成为可能，并相继应用于亚微米级苝晶体的晶体取向测量。(4)实现了石英纤维的紫外测量和小刚度常数探头的柔性测量。(1)利用近场光照射苝微晶体表面，制备出直径小于100nm、深度为几十nm的孔。由于表面激子的光激发，加速了表面组成分子的脱附或解离，这种加工成为可能。(2)利用原子力显微镜研究了光处理后的时间地形变化。表面分子的平均扩散速度约为2 ~ 3nm/min。少

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