Characterization of Second-Order Reflection Bands from a Cholesteric Liquid Crystal Cell Based on a Wavelength-Swept Laser
<p>Fabrication process of the CLC cell; (<b>a</b>) electrode substrates, (<b>b</b>) spin coating, (<b>c</b>) baking, (<b>d</b>) rubbing and (<b>e</b>) the fabricated CLC cell.</p> "> Figure 2
<p>Structure of the CLC cell.</p> "> Figure 3
<p>Photograph of the CLC texture.</p> "> Figure 4
<p>Second-order reflection spectrum when the light was incident to the normal direction of the CLC cell when the electric field applied to the CLC cell was fixed to 0.49 V<sub>rms</sub>/μm.</p> "> Figure 5
<p>(<b>a</b>) Experimental setup for measuring the CLC reflection band and (<b>b</b>) optical spectrum output from the WSL.</p> "> Figure 6
<p>The normalized transmitted spectra according to the applied electric field when the angle of incidence to the CLC cell was fixed to 20°. (<b>a</b>) The electric field ranged from 0.18 V<sub>rms</sub>/μm to 0.77 V<sub>rms</sub>/μm and (<b>b</b>) the electric field ranged from 0.77 V<sub>rms</sub>/μm to 1.03 V<sub>rms</sub>/μm.</p> "> Figure 7
<p>The normalized transmitted spectra according to the applied electric field when the angle of incidence to the CLC cell was fixed to 36°.</p> "> Figure 8
<p>The normalized transmitted spectra according to the applied electric field more than 1.54 V<sub>rms</sub>/μm when the angle of incidence to the CLC cell was fixed to 36°.</p> "> Figure 9
<p>Relative reflectance of the CLC cell according to the applied electric field when the angle of incidence to the CLC cell was fixed to 36°.</p> "> Figure 10
<p>(<b>a</b>) Normalized transmitted spectra and (<b>b</b>) variation of the short edge wavelength according to the angles of incidence of the beam on the CLC cell when the electric field applied to the CLC cell was fixed to 0.49 V<sub>rms</sub>/μm.</p> ">
Abstract
:1. Introduction
2. Fabrication of the CLC Cell
3. Experiments
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Ahn, S.; Ko, M.O.; Kim, J.-H.; Chen, Z.; Jeon, M.Y. Characterization of Second-Order Reflection Bands from a Cholesteric Liquid Crystal Cell Based on a Wavelength-Swept Laser. Sensors 2020, 20, 4643. https://doi.org/10.3390/s20164643
Ahn S, Ko MO, Kim J-H, Chen Z, Jeon MY. Characterization of Second-Order Reflection Bands from a Cholesteric Liquid Crystal Cell Based on a Wavelength-Swept Laser. Sensors. 2020; 20(16):4643. https://doi.org/10.3390/s20164643
Chicago/Turabian StyleAhn, Soyeon, Myeong Ock Ko, Jong-Hyun Kim, Zhongping Chen, and Min Yong Jeon. 2020. "Characterization of Second-Order Reflection Bands from a Cholesteric Liquid Crystal Cell Based on a Wavelength-Swept Laser" Sensors 20, no. 16: 4643. https://doi.org/10.3390/s20164643