Fabrication of 1x2 optical switch devices based on semiconductor-to-metallic phase transition characteristics of VO2 smart coatings

M. Soltani; M. Chaker; E. Haddad; Roman Kruzelesky

doi:10.1117/12.624284

23 May 2005 Fabrication of 1x2 optical switch devices based on semiconductor-to-metallic phase transition characteristics of VO2 smart coatings

M. Soltani, M. Chaker, E. Haddad, Roman Kruzelesky

Author Affiliations +

Proceedings Volume 5855, 17th International Conference on Optical Fibre Sensors; (2005) https://doi.org/10.1117/12.624284
Event: 17th International Conference on Optical Fibre Sensors, 2005, Bruges, Belgium

Abstract

We have successfully fabricated two types of optical switch devices, namely, all-optical switch (VO₂/quartz) and electro-optical switch (VO₂/TiO₂/ITO/glass) based on semiconductor-to-metallic phase transition characteristic of vanadium dioxide (VO₂) smart coatings. The VO₂ active layer, the TiO₂ buffer layer, and the ITO transparent conductive electrode used in these devices, were achieved by reactive pulsed laser deposition. The optical switching of the fabricated devices was investigated at λ = 1.55 μm. The semiconductor (on) to metallic (off) phase transition was controlled by photoexcitation of VO₂ in the case of the all-optical switch, and by an external electric-field between the ITO and the VO₂ layer in the case of the electro-optical switch. The extinction ratio (on/off) is found to be much higher for the all-optical switch than for the electro-optical switch. For the all-optical switch, extinction ratio of about 22 dB and 12 dB are obtained in the transmission and reflection modes respectively. In the case of the electro-optical switch, the extinction ratio is about 12 dB in the transmission mode and 5 dB in the reflection mode.

Citation Download Citation

M. Soltani, M. Chaker, E. Haddad, and Roman Kruzelesky "Fabrication of 1x2 optical switch devices based on semiconductor-to-metallic phase transition characteristics of VO2 smart coatings", Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); https://doi.org/10.1117/12.624284

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