A quick description of the work progress in each task is presented below.<\/p>\n
Development of simple reconfigurable circuits based on chalcogenide glasses<\/em><\/strong><\/h5>\nThe design and fabrication of such simple and well-known circuits aims at present the first proof-of-concepts and mainly complete, in-situ, the microwave characterization of the chalcogenide materials (permittivity in amorphous state, conductivity in crystalline one, losses, etc.). This characterization will be made using a retro-simulation process based on the measured responses of these simple circuits.<\/p>\n
At that time, most of the circuits are ready (see some examples in Figure 2.1) and we only wait for the finalization of the deposition process (WP1). A first circuits fabrication run is planned for April 2022.<\/p>\n
![\"\"](\"https:\/\/project.inria.fr\/daterac\/files\/2022\/03\/WP2_Fig1a_Shunt_stub-300x98.png\")
\u00a0\u00a0\u00a0<\/a>![\"\"](\"https:\/\/project.inria.fr\/daterac\/files\/2022\/03\/WP2_Fig1b_series_switch-300x233.png\")
<\/a><\/p>\nFigure 2.1 – Examples of simple reconfigurable circuits (shunt stub and series switch) for chalcogenide materials characterization.<\/strong><\/em><\/p>\nStudy and development of optical biasing architectures<\/em><\/strong><\/h5>\nIn the first task of this WP, we will use heating process first to switch the chalcogenide materials from amorphous to crystalline states. We will also quickly use non-integrated laser source for photo-induced optical control. Several lasers have been identified and are available from our partner\u00a0FOTON Institute, recently integrated in DATERAC project. All the available lasers will allow us to test different configurations in Continuous Wave (CW) with different wavelengths (405 nm, 532 nm and 1064 nm) or in pulsed mode (Laser TI or OPO).<\/p>\n
In order to develop the manufacturing process between our partners, ISCR and FOTON, chalcogenide glasses deposition are currently in progress on 2 substrates. The first one is consist of a full plate deposit of chalcogenide glasses without any further step. It will mainly used for materials chalcogenide characterizations (see WP1). The second one will consists of some glasses areas closed in shape and size to the structures used in the demonstrators developed in the third task of this WP. A lift-off process will be used here. The layout of this second substrate is presented in Figure 2.2.<\/p>\n
![\"\"](\"https:\/\/project.inria.fr\/daterac\/files\/2022\/03\/WP2_Fig1a_Shunt_stub.png\")
\u00a0\u00a0\u00a0<\/a>![\"\"](\"https:\/\/project.inria.fr\/daterac\/files\/2022\/03\/WP2_Fig1b_series_switch.png\")
<\/a><\/p>\nFigure 2.1 – Examples of simple reconfigurable circuits (shunt stub and series switch) for chalcogenide materials characterization.<\/strong><\/em><\/p>\n In the first task of this WP, we will use heating process first to switch the chalcogenide materials from amorphous to crystalline states. We will also quickly use non-integrated laser source for photo-induced optical control. Several lasers have been identified and are available from our partner\u00a0FOTON Institute, recently integrated in DATERAC project. All the available lasers will allow us to test different configurations in Continuous Wave (CW) with different wavelengths (405 nm, 532 nm and 1064 nm) or in pulsed mode (Laser TI or OPO).<\/p>\n In order to develop the manufacturing process between our partners, ISCR and FOTON, chalcogenide glasses deposition are currently in progress on 2 substrates. The first one is consist of a full plate deposit of chalcogenide glasses without any further step. It will mainly used for materials chalcogenide characterizations (see WP1). The second one will consists of some glasses areas closed in shape and size to the structures used in the demonstrators developed in the third task of this WP. A lift-off process will be used here. The layout of this second substrate is presented in Figure 2.2.<\/p>\nStudy and development of optical biasing architectures<\/em><\/strong><\/h5>\n