Simultaneous determination of ordinary and extraordinary refractive index dispersions of nematic liquid crystals in the visible and near-infrared regions from an interference spectrum

2016 ◽  
Vol 120 (15) ◽  
pp. 155502 ◽  
Author(s):  
Ryotaro Ozaki ◽  
Koji Nishi ◽  
Takayuki Kan ◽  
Kazunori Kadowaki
Keyword(s):  
Refractive Index ◽  
Liquid Crystals ◽  
Simultaneous Determination ◽  
Near Infrared ◽  
Nematic Liquid Crystals ◽  
Interference Spectrum ◽  
Extraordinary Refractive Index

Large extraordinary refractive index in highly birefringent nematic liquid crystals of dinaphthyldiacetylene-based materials

2013 ◽  
Vol 1 (27) ◽  
pp. 4222 ◽  
Author(s):  
Sungmin Kang ◽  
Shunpei Nakajima ◽  
Yuki Arakawa ◽  
Gen-ichi Konishi ◽  
Junji Watanabe
Keyword(s):  
Refractive Index ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Extraordinary Refractive Index

Simultaneous determination of size and refractive index of red blood cells by light scattering measurements

2006 ◽  
Vol 88 (8) ◽  
pp. 084101 ◽  
Author(s):  
N. Ghosh ◽  
P. Buddhiwant ◽  
A. Uppal ◽  
S. K. Majumder ◽  
H. S. Patel ◽  
...  
Keyword(s):  
Refractive Index ◽  
Light Scattering ◽  
Red Blood Cells ◽  
Simultaneous Determination ◽  
Blood Cells ◽  
Scattering Measurements

scholarly journals Switchable Photonic Nanojet by Electro-Switching Nematic Liquid Crystals

Nanomaterials ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 72 ◽  
Author(s):  
Bintao Du ◽  
Jun Xia ◽  
Jun Wu ◽  
Jian Zhao ◽  
Hao Zhang
Keyword(s):  
Refractive Index ◽  
Liquid Crystals ◽  
Double Layer ◽  
Nematic Liquid Crystals ◽  
Surrounding Medium ◽  
Refractive Index Change ◽  
Electric Energy ◽  
Incident Wavelength ◽  
Photonic Nanojet ◽  
Energy Focusing

This paper first presents a switchable photonic nanojet (PNJ) generated by a polystyrene (PS) microsphere immersed in nematic liquid crystals (NLCs). The PNJ is switched by applying external voltage, which originates from the refractive index change in the surrounding medium caused by the field-induced realignment of liquid crystal molecules. By tuning the refractive index of NLCs larger or smaller than that of the PS microsphere, the PNJ can be switched off or on. Moreover, we present an optimization study to seek a better electric energy focusing property of the PNJ. Our results reveal that the switchability of PNJ can be optimized by applying a shorter incident wavelength, a double-layer microsphere, and a PS ellipsoid. The full width at half-maximum (FWHM) generated by the PS ellipsoid is narrower than that generated by the microsphere with a shorter incident wavelength. The intensity contrast of the PS ellipsoid is higher than that of the double-layer microsphere. As a whole, the switchability of PNJ can be best optimized by a PS ellipsoid. This should open the way for the development of integrated photonic devices.

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