Polarization diversity circuit for a silicon optical switch using silica waveguides integrated with photonic crystal thin film waveplates

2016 ◽  
Author(s):  
Koki Sugiyama ◽  
Takafumi Chiba ◽  
Takayuki Kawashima ◽  
Shojiro Kawakami ◽  
Hiroshi Takahashi ◽  
...  
Keyword(s):  
Thin Film ◽  
Photonic Crystal ◽  
Optical Switch ◽  
Polarization Diversity

scholarly journals Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4×4 silicon optical switch

2017 ◽  
Vol 14 (10) ◽  
pp. 20170252-20170252
Author(s):  
Koki Sugiyama ◽  
Takafumi Chiba ◽  
Ken Tanizawa ◽  
Keijiro Suzuki ◽  
Takayuki Kawashima ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Optical Switch ◽  
Polarization Diversity

scholarly journals Enhancement of Photon Absorption onBaxSr1-xTiO3Thin-Film Semiconductor Using Photonic Crystal

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Abd. Wahidin Nuayi ◽  
Husin Alatas ◽  
Irzaman S. Husein ◽  
Mamat Rahmat
Keyword(s):  
Thin Film ◽  
Photonic Crystal ◽  
Mole Fraction ◽  
Visible Spectrum ◽  
Transparent Conductive Oxide ◽  
Photon Absorption ◽  
Film Properties ◽  
Solution Deposition ◽  
Chemical Solution Deposition Method ◽  
Bst Thin Film

Enhancement of photon absorption on barium strontium titanate (BaxSr1-xTiO3) thin-film semiconductor for mole fractionx=0.25, 0.35, 0.45, and 0.55 using one-dimensional photonic crystal with defect was investigated experimentally. The thin film was grown on transparent conductive oxide (TCO) substrate using chemical solution deposition method and annealed at 500°C for 15 hours with increasing rate of 1.6°C/min. From optical characterization in visible spectrum it was found that the average absorption percentages are 92.04%, 83.55%, 91.16%, and 80.12%, respectively. The BST thin film with embedded photonic crystal exhibited a relatively significant enhancement on photon absorption, with increasing value of 3.96%, 7.07%, 3.04%, and 13.33% for the respective mole fraction and demonstrating absorbance characteristic with flat feature. In addition, we also discuss the thin-film properties of attenuation constant and electrical conductivity.

scholarly journals Tunable Infrared Optical Switch Based on Vanadium Dioxide

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2988
Author(s):  
Qi Wang ◽  
Shijie Zhang ◽  
Chen Wang ◽  
Rui Li ◽  
Tianhan Cai ◽  
...  
Keyword(s):  
Thin Film ◽  
Vanadium Dioxide ◽  
Optical Switching ◽  
Modulation Depth ◽  
Optical Switch ◽  
Extinction Ratio ◽  
Infrared Region ◽  
Metallic Phase ◽  
Ultrafast Switching ◽  
Difference Time

A tunable infrared optical switch based on a plasmonic structure consisting of aluminum nanoarrays with a thin film of vanadium dioxide is proposed. This optical switch can realize arbitrary wavelength-selective optical switching in the mid-infrared region by altering the radii of the aluminum nanoarrays. Furthermore, since vanadium dioxide transforms from its low-temperature insulator phase to a high-temperature metallic phase when heated or applied voltage, the optical switch can achieve two-way switching of its “ON” and “OFF” modes. Finite-difference time-domain software is used to simulate the performance of the proposed infrared optical switch. Simulation results show that the switch offers excellent optical performances, that the modulation depth can reach up to 99.4%, and that the extinction ratio exceeds −22.16 dB. In addition, the phase transition time of vanadium dioxide is on the femtosecond scale, which means that this optical switch based on a vanadium dioxide thin film can be used for ultrafast switching.

scholarly journals Polarization-Rotator-Free Polarization-Diversity 4 4 Si-Wire Optical Switch

2016 ◽  
Vol 8 (2) ◽  
pp. 1-7 ◽  
Author(s):  
K. Suzuki ◽  
K. Tanizawa ◽  
S.-H. Kim ◽  
S. Suda ◽  
G. Cong ◽  
...  
Keyword(s):  
Optical Switch ◽  
Polarization Diversity ◽  
Polarization Rotator ◽  
Free Polarization
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