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Poster De Conférence Année : 2023

Diamond-based active antireflective optical windows with omniphobic properties

Résumé

Infrared windows are among the key optical components in infrared detection systems with military and civil applications, including land and sea surveillance systems, airborne sensors for the detection of threats, cameras of autonomous trains, etc. However, the optical properties of these systems, commonly used in severe environmental conditions, can be altered due to the formation of biofilms or contaminants deposition. To protect these systems, we propose to extend the functionality of these optical surfaces, by developing robust « active » diamond windows allowing them to be fitted with anti-dirt. Indeed, diamond is a promising material. In addition to having very good mechanical properties, it is transparent in the range from visible to long-wave infrared and it is an excellent thermal conductor1. Once boron-doped, diamond has remarkable electrochemical properties2, including the capacity of electrochemical auto-cleaning of its surface and therefore anti-dirt properties. It is known that boron doping enhances the electrical conductivity of diamond. Thus, the electrochemical character of the boron-doped diamond (BDD) is strongly dependent on the boron doping level. However, the high boron content also affects the optical transmission in diamond. The present work aims to design and build active diamond optical windows, combining anti-reflective, electrochemical auto-cleaning. For this need, we will investigate the boron doping level necessary to achieve the electrochemical auto-cleaning properties of the diamond surface without deteriorating the optical transmission of the windows. Thus, we will focus on (1) optimizing the growth of doped diamond films using microwave plasma-assisted chemical vapor deposition by taking into account the application constraints and (2) understanding the phenomena at stake during the self-cleaning mechanisms of these so-called « active windows ».
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Dates et versions

cea-04107481 , version 1 (26-05-2023)
cea-04107481 , version 2 (20-12-2023)

Identifiants

  • HAL Id : cea-04107481 , version 2

Citer

Ben Khemis Sirine, Emmanuel Scorsone, Raphael Guillemet. Diamond-based active antireflective optical windows with omniphobic properties. SBDD XXVII - Hasselt Diamond Workshop 2023, Mar 2023, Hasselt, Belgium. . ⟨cea-04107481v2⟩
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