Electro-Optic Glass for Infrared Modulators - presentation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913311" target="_blank" >RIV/60461373:22310/17:43913311 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Electro-Optic Glass for Infrared Modulators - presentation

Original language description

New cost effective infrared modulators are required for reliable processing of optical signals in free space or fibre-optic communications. For these modulators, new glass materials with a high electro-optic coefficient need to be developed. Because high values of an electro-optic coefficient can be achieved in heavy metal glasses doped with metallic nanoparticles, we chose such materials as very promising for this application. In our work, we developed a new glass containing Ag0 nanoparticles based on the glass-forming system PbO-Bi2O3-Ga2O3 that was doped with Ag+ ions in the combination with Sb2O3 as a reducing agent for the precipitation of the nanoparticles. The glass was melted at 1000 °C for 35 min and then cast into a steel mould. Using Sb2O3, Ag+ ions were successfully reduced to metallic silver Ag0, and during heat treatment nanoparticles of a defined size were formed by the clustering of mobile Ag0 atoms. The electro-optic coeffcient of the glass was measured in our optical transmittance setup with a polarizer and analyser. From the rotation angle of the analyser, the electro-optical coefficient was calculated. Its values of the order 10-11 m.V-2 were measured for the glass containing nanoparticles with the optimized mean size of 5 nm that were precipitated by heat treatment at 350 °C for 15 min. Another advantage of this glass was that in the range of 550–2750 nm it had a transmittance of above 70 %, which is high enough to achieve low optical signal attenuation in the near infrared region. Collectively, our results indicate that the developed glass with Ag0 nanoparticles of the optimized size could be applied to the construction of cost effective and reliable infrared modulators.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

21001 - Nano-materials (production and properties)

Project

<a href="/en/project/TH01010567" target="_blank" >TH01010567: Modulators for free-space optics</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

U - Předmět řešení projektu je utajovanou skutečností podle zvláštních právních předpisů nebo je skutečností, jejíž zveřejnění by mohlo ohrozit činnost zpravodajské služby. Údaje o projektu jsou upraveny tak, aby byly zveřejnitelné