scholarly journals Silicon-organic hybrid phase shifter based on a slot waveguide with a liquid-crystal cladding

2012 ◽  
Vol 20 (14) ◽  
pp. 15359 ◽  
Author(s):  
Joerg Pfeifle ◽  
Luca Alloatti ◽  
Wolfgang Freude ◽  
Juerg Leuthold ◽  
Christian Koos
Keyword(s):  
Liquid Crystal ◽  
Phase Shifter ◽  
Slot Waveguide ◽  
Organic Hybrid

Lattice spin simulations of low power photonic liquid-crystal devices

2019 ◽  
Vol 31 (01) ◽  
pp. 2050009
Author(s):  
Rita Asquini ◽  
Antonio d’Alessandro ◽  
Cesare Chiccoli ◽  
Paolo Pasini ◽  
Claudio Zannoni
Keyword(s):  
Monte Carlo ◽  
Liquid Crystal ◽  
Simple Model ◽  
External Field ◽  
Optical Transmission ◽  
Monte Carlo Study ◽  
Photonic Devices ◽  
Slot Waveguide ◽  
Organic Hybrid ◽  
Liquid Crystal Devices

We have performed a detailed Monte Carlo study of photonic devices based on nematic liquid crystal infiltrated in polydimethylsiloxane (PDMS) and in Silicon-Organic Hybrid (SOH) channels, to be used as waveguides. The simulations of a simple model of these slot waveguide shifters have shown the effect of an applied electric external field in two cases with different surface alignments, i.e. planar SOH and homeotropic PDMS. We have investigated the effect of the external field on the optical transmission and the ordering across the cell.

Digitally Controlled Phase Shifter Using an SOI Slot Waveguide With Liquid Crystal Infiltration

2015 ◽  
Vol 27 (12) ◽  
pp. 1269-1272 ◽  
Author(s):  
Yufei Xing ◽  
Thomas Ako ◽  
John P. George ◽  
Dietmar Korn ◽  
Hui Yu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Phase Shifter ◽  
Slot Waveguide ◽  
Digitally Controlled

scholarly journals Temperature Characterization of Liquid Crystal Dielectric Image Line Phase Shifter for Millimeter-Wave Applications

Crystals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 63
Author(s):  
Henning Tesmer ◽  
Rani Razzouk ◽  
Ersin Polat ◽  
Dongwei Wang ◽  
Rolf Jakoby ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Millimeter Wave ◽  
Insertion Loss ◽  
Phase Shifter ◽  
Ground Plane ◽  
Temperature Dependent ◽  
Differential Phase ◽  
Dependent Behavior ◽  
The Impact ◽  
Temperature Dependent Behavior

In this paper we investigate the temperature dependent behavior of a liquid crystal (LC) loaded tunable dielectric image guide (DIG) phase shifter at millimeter-wave frequencies from 80 GHz to 110 GHz for future high data rate communications. The adhesive, necessary for precise fabrication, is analyzed before temperature dependent behavior of the component is shown, using the nematic LC-mixture GT7-29001. The temperature characterization is conducted by changing the temperature of the LC DIG’s ground plane between −10∘C and 80 ∘C. The orientation of the LC molecules, and therefore the effective macroscopic relative permittivity of the DIG, is changed by inserting the temperature setup in a fixture with rotatable magnets. Temperature independent matching can be observed, while the insertion loss gradually increases with temperature for both highest and lowest permittivity of the LC. At 80 ∘C the insertion loss is up to 1.3dB higher and at −10∘C it is 0.6dB lower than the insertion loss present at 20 ∘C. In addition, the achievable differential phase is reduced with increasing temperature. The impact of molecule alignment to this reduction is shown for the phase shifter and an estimated 85% of the anisotropy is still usable with an LC DIG phase shifter when increasing the temperature from 20 ∘C to 80 ∘C. Higher reduction of differential phase is present at higher frequencies as the electrical length of the phase shifter increases. A maximum difference in differential phase of 72∘ is present at 110 GHz, when increasing the temperature from 20 ∘C to 80 ∘C. Nevertheless, a well predictable, quasi-linear behavior can be observed at the covered temperature range, highlighting the potential of LC-based dielectric components at millimeter wave frequencies.

Space Radiation Environment Testing of Liquid Crystal Phase Shifter Devices

2016 ◽  
Vol 15 ◽  
pp. 1923-1926 ◽  
Author(s):  
Christopher D. Woehrle ◽  
Derek T. Doyle ◽  
Steven A. Lane ◽  
Christos G. Christodoulou
Keyword(s):  
Liquid Crystal ◽  
Phase Shifter ◽  
Space Radiation ◽  
Crystal Phase ◽  
Radiation Environment ◽  
Liquid Crystal Phase ◽  
Space Radiation Environment

Liquid crystal millimeter wave electronic phase shifter

1993 ◽  
Vol 62 (10) ◽  
pp. 1065-1067 ◽  
Author(s):  
K. C. Lim ◽  
J. D. Margerum ◽  
A. M. Lackner
Keyword(s):  
Liquid Crystal ◽  
Millimeter Wave ◽  
Phase Shifter ◽  
Electronic Phase

Analysis of a phase shifter based on a slot polymeric waveguide with liquid crystal cladding

2021 ◽  
Author(s):  
Flavio Cornaggia ◽  
Badrul Alam ◽  
Antonio d'Alessandro ◽  
Rita Asquini
Keyword(s):  
Liquid Crystal ◽  
Phase Shifter ◽  
Polymeric Waveguide

Voltage-controlled liquid-crystal terahertz phase shifter and quarter-wave plate

2006 ◽  
Vol 31 (8) ◽  
pp. 1112 ◽  
Author(s):  
Cho-Fan Hsieh ◽  
Ru-Pin Pan ◽  
Tsung-Ta Tang ◽  
Hung-Lung Chen ◽  
Ci-Ling Pan
Keyword(s):  
Liquid Crystal ◽  
Phase Shifter ◽  
Quarter Wave Plate ◽  
Wave Plate ◽  
Quarter Wave
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