Abstract

In this study, a variable capacitor made of a nematic liquid crystal cell is proposed and analyzed theoretically. The mutual capacitance is steered with an optical beam of a Gaussian shape launched into the cell. The optical field changes the orientation of the molecules and affects the capacitance. By using Frank–Oseen elastic theory, the molecular reorientation is simulated. The influence of various parameters on capacitance, such as beam width, anchoring condition, externally applied voltage, beam power, and launching position, is presented. For instance, the maximum tuning range is achieved for wide beams and the molecules initially aligned close to the propagation axis. It is also proved that launching position, especially for narrow beams, has limited influence on capacitance. The proposed component can be used, for instance, in optical power meters, as feedback in laser or light-emitting diode systems or just as a variable capacitor in optoelectronic circuits. One of the advantages of this device is that the beam passes through the element, so steering of the capacitance or measuring the parameters of the beam can be realized in-system, without splitting the beam. Moreover, due to the low thickness of the liquid crystal layer, the attenuation is very low.

© 2017 Optical Society of America

Full Article  |  PDF Article
More Like This
Molecular motion analysis in nematic liquid-crystal cells using linear and nonlinear optical techniques

R. Stolle, T. Dürr, and G. Marowsky
J. Opt. Soc. Am. B 14(7) 1583-1590 (1997)

Measurement of the self-induced waveguide of a solitonlike optical beam in a nematic liquid crystal

Xavier Hutsebaut, Cyril Cambournac, Marc Haelterman, Jeroen Beeckman, and Kristiaan Neyts
J. Opt. Soc. Am. B 22(7) 1424-1431 (2005)

Electrically tunable Fabry–Perot lasing in nematic liquid crystal cells

Inge Nys, Jeroen Beeckman, and Kristiaan Neyts
J. Opt. Soc. Am. B 31(7) 1516-1524 (2014)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (10)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Metrics