Electro-optical characteristics of room-temperature amorphous liquid-crystal BPIII

• Main Authors: Sheng-feng Lu, 呂昇峰
• Other Authors: Sheng-hua Lu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/b274t3

碩士 === 逢甲大學 === 光電學系 === 103 === In this thesis, an amorphous blue-phase liquid-crystal material (BPIII) with wide temperature range (~10.8°C) can be obtained without polymer network or other guest component and its electro-optical characteristics are studied. When a horizontal electric field is applied on BPIII cell, the light intensity and response time in different experimental conditions, such as the electric field strength, frequency, cell gap and incident angle of light are measured. In the end of the thesis, we try to propose a possible mechanism to explain the electro-optical property of BPIII. From the experimental results shown in the thesis, we see that the BPIII cell can be a fast response photonic device with high contrast ratio, no residual light intensity at null voltage and less hysteresis effect during operation. According to the behaviors on the light intensity and the induced birefringence with the electric field, Kerr effect can explain experimental results partly. The flexoelectric effect must be considered.