Design and fabrication of single- and coupled-cavity thin film structures for optical switching and regeneration

2011 ◽  
Author(s):  
Liyong Diao
Keyword(s):  
Thin Film ◽  
Optical Switching ◽  
Coupled Cavity

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.

Nanopattern enabled terahertz all-optical switching on vanadium dioxide thin film

2011 ◽  
Vol 98 (7) ◽  
pp. 071105 ◽  
Author(s):  
S. B. Choi ◽  
J. S. Kyoung ◽  
H. S. Kim ◽  
H. R. Park ◽  
D. J. Park ◽  
...  
Keyword(s):  
Thin Film ◽  
Vanadium Dioxide ◽  
Optical Switching ◽  
All Optical ◽  
All Optical Switching

Improved electrochromic performance of a radio frequency magnetron sputtered NiO thin film with high optical switching speed

RSC Advances ◽  
2016 ◽  
Vol 6 (83) ◽  
pp. 79668-79680 ◽  
Author(s):  
K. S. Usha ◽  
R. Sivakumar ◽  
C. Sanjeeviraja ◽  
Vasant Sathe ◽  
V. Ganesan ◽  
...  
Keyword(s):  
Thin Film ◽  
Radio Frequency ◽  
Optical Switching ◽  
Switching Time ◽  
Rf Magnetron Sputtering ◽  
Optical Modulation ◽  
Switching Speed ◽  
Coloration Efficiency ◽  
Fast Switching ◽  
Nio Thin Film

A nickel oxide (NiO) thin film with better reversibility, high optical modulation, and enhanced coloration efficiency with fast switching time was prepared using radio frequency (rf) magnetron sputtering technique.

All optical switching in henna thin film

2013 ◽  
Vol 112 (2) ◽  
pp. 261-265 ◽  
Author(s):  
Fryad Z. Henari ◽  
Khalil E. Jasim
Keyword(s):  
Thin Film ◽  
Optical Switching ◽  
All Optical ◽  
All Optical Switching

Time-modulated Coupled-cavity System for Optical Switching

2021 ◽  
Vol 35 (11) ◽  
pp. 1443-1444
Author(s):  
Adam Mock
Keyword(s):  
Finite Difference Time Domain ◽  
Optical Switching ◽  
Coupled Mode Theory ◽  
Scattering Parameters ◽  
Optical Carrier ◽  
Time Modulation ◽  
Coupled Mode ◽  
Cavity System ◽  
Difference Time ◽  
Coupled Cavity

The scattering parameters of a time-modulated two-coupled-cavity system are obtained using coupled mode theory and verified using the finite-difference time-domain method. We find that a suitably tailored time-modulation of the cavities allows for switching the output on and off. The proposed functionality can be used in direct amplitude modulation of an optical carrier from a frequency-modulated RF message.

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