Improved Refractive Index from a Planar Leaky Wave-Guide Coupler

1999 ◽  
Vol 597 ◽  
Author(s):  
Tao Liu ◽  
Robert J. Samuels
Keyword(s):  
Thin Film ◽  
Refractive Index ◽  
Numerical Calculation ◽  
Film Theory ◽  
Wave Guide ◽  
Leaky Wave ◽  
Optical Wave ◽  
New Methods ◽  
Optical Wave Guide ◽  
Loss Coefficients

AbstractModal loss coefficients for a planar leaky wave-guide are obtained by two new methods. One is a numerical calculation combining optical thin film theory with optical wave-guide theory; another is an analytical derivation based on analogy to Beer's law. Considering the influence of the modal loss, a modified mode equation for the planar leaky wave-guide is obtained, which greatly increases the accuracy of the refractive index and thickness of the thin film in a planar leaky wave-guide coupler (prism I film I substrate).

scholarly journals Fabrication of Optical Modulator Based on Proton Exchange

2016 ◽  
Vol 2 (2) ◽  
pp. 175
Author(s):  
Ki-sung Kang ◽  
Dea-wha Soh
Keyword(s):  
Thin Film ◽  
Optical Switch ◽  
Exchange Process ◽  
Annealing Process ◽  
Proton Exchange ◽  
Wave Guide ◽  
Optical Modulator ◽  
Exchange Method ◽  
Optical Wave ◽  
Optical Wave Guide

<p>For the investigation of optical modulator, the optical wave-guide was fabricated on x-cut LiNbO<sub>3</sub> substrate using proton exchange method with self-aligned electrode. The electrode pattern was designed using a self-aligned thin film electrode method. After proton exchange process, the wave-guide could be prepared by annealing process to control the width and depth of the optical wave-guide. The initial crossover state of the fabricated 1´2 optical switch was observed with controlling the annealing process variables and the structure of self-aligned thin film electrodes. As the results in the present work, the measured cross talk and minimum detectable switching voltage were obtained at the values of -29.5dB and 8.0V, respectively, with good merits.</p>

Investigation on Optical Properties of Transparent ITO Thin Films

2011 ◽  
Vol 347-353 ◽  
pp. 3481-3484
Author(s):  
Xue Hua Li ◽  
Dong Sheng Wang ◽  
Jian Zhou Du
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Refractive Index ◽  
Optical Properties ◽  
Glass Substrate ◽  
Film Theory ◽  
Single Layer ◽  
Minimum Value ◽  
Ito Thin Films ◽  
Layer Thin Film

Based on the single-layer thin film theory, we calculated transmittance of ITO thin film. The reflectivity arrive a maximum or a minimum according to whether the refractive index of film is greater or smaller than the refractive index of the glass substrate. we obtain the same maximum of transparence which is above 95% and the minimum value which decrease to 76.5% with the increase of refractive index.

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