Anti-reflection coatings

In partnership with Artemis Optical,  anti-reflection coating of GLS chalcogenide glass has been demonstrated.  This reduces reflections from GLS glass surfaces to <1%, significantly lower than the ~28% reflection from the uncoated glass that is a result of its high refractive index. ARcoating_a.jpg with Testing of the coated optics, shows them passing industrial standard adhesion, abrasion and solubility tests without problem and passing humidity and temperature environmental testing.

Initial test were for unoptimized coatings designed for the 3-5micron waveband. Please contact us to discuss collaborations on broader-band and lower loss coatings.

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Infrared sensing and imaging : Challenges for next generation materials and devices

Presentations from the Infrared sensing and imaging : Challenges for next generation materials and devices meeting in Exeter on 15 November 2017 are now available

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Chalcogenide glass-on-graphene

2d-material integration enabled by direct deposition of chalcogenide glass onto graphene is detailed in our latest Nature publication, in collaboration with MIT   The deposited chalcogenides can be directly pattered on a variety of 2D materials to simultaneously act as  passive light guides, active gates and protect the 2D material without the transfer processes previously used.

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On-chip photonic synapse

A new paper published 27 September 2017 by ChAMP partners from Oxford and Exeter continues the search for new “neuromorphic computing” architectures that mimic the brain’s approach to simultaneous processing and storage of information is intense.

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Optical, Thermal, and Mechanical Characterization of Ga2Se3-Added GLS Glass published in Advanced Materials.

Video abstract of our latest publication in Advanced Materials Jul 6, 2017

The results of the addition of Se to gallium lanthanum sulfide (GLS) glass through the substitution of Ga2S3 by Ga2Se3 are described. An innovative open melting apparatus is used. The addition of selenium to GLS glass generally results in a lower glass transition temperature and an extended transmission

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Structural modification of GaLaS glass for a new family of chalcogenides

Andrea Ravagli presents the latest on ChAMP chalcogenide glass development at SPIE Secuirty and Defence in Anaheim on April 11 2017. Including new CTE, Tg and hardness measurements for up to 60% Ga2Se2 glass and the impact of Indium and Tellurium doping on infrared absorption.

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Material optimisation

The ternary compositional map of the electrical resistance contrast associated with the amorphous (as deposited) to crystalline (at 300C) phase transition for a GeSbTe thin film library

Optimisation of material composition for individual applications is a core part of ChAMP. This is achieved through partnership with the Advanced Composite Materials Facility (ACMF) at the University of Southampton headed by Prof. Brian Hayden and housed in the department of Chemistry. Continue reading

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