An Investigation of a Fused Design Method on Both Micro-Optics and Mechanics of an Optical Sensing Devices Having High Spatial Resolution

近场记录，利用非常紧凑的激光功率聚焦到一个光圈和一个微小的三角形光圈安装浮动头滑块已经在克服困难的光学衍射极限有希望的突破。本研究的目的是从实验上阐明三角形孔径与偏振光结合的基本特性。主要研究结果如下。首先，得到了明确的趋势，当偏振方向垂直于底侧时，可以获得最高的空间（读出）分辨率抑制DC偏移光功率。当将轨道宽度从500 nm改变到100 nm时检测到的信号波形表明，当孔位于稍微远离几何轨道中心时，对应于轨道图案的读出信号幅度具有其局部最大值。估计读出图案信号幅度近似与场扩展与磁道宽度的比率成比例。最后，在孔径-介质间距为27 nm、频率为12 MHz的条件下，成功地确定了与100 nm宽的轨道上形成的120 nm L/S图案对应的清晰的读出信号波形。

Near-field recording that utilizes extremely compact laser-power focusing onto an aperture and a minute triangular aperture mounted flying head slider have been promising breakthroughs in overcoming difficult optical diffraction limits. The purpose of this research was to experimentally clarify the fundamental characteristics of a triangular aperture which was combined with a polarized light. Obtained main results were as follows. Firstly, clear tendency was obtained that when the polarization direction was perpendicular to the bottom side, the highest spatial (readout) resolution could be obtained suppressing DC offset light power. Detected signal waveforms when changing track width from 500 nm to 100 nm indicated that readout signal amplitude corresponding to the track pattern had its local maximums when the aperture located slightly apart from the geometrical track centre. Readout pattern signal amplitudes were estimated to be approximately proportional to the ratio of the field spread to the track width. Finally, we could successfully confirmed clear readout signal waveform corresponding to the 120 nm L/S pattern formed on the 100 nm wide track, on the condition of 27 nm aperture-to-medium spacing and 12 MHz frequency band.