Update photonics/index.html

photonics/index.html

@@ -74,6 +74,7 @@
   <!-- TODO logo Fresnel, ANR, ... -->
   <a href="http://www.ulg.ac.be"><img src="http://onelab.info/logo_uliege.jpg" height="68px"></a>&nbsp;
   <a href="http://www.wallonie.be"><img src="http://onelab.info/logo_rw.jpg" height="68px"></a>&nbsp;
+  <a href="http://www.fresnel.fr"><img src="../logo_fresnel.jpg" height="68px"></a>&nbsp;
 </center>
 
 </body>