A perfectly symmetric system that ends up in a non-symmetric state: coupled optical nanocavities under coherent excitation

Symmetry governs nature… but not always the way we expect! Although systems tend to respect their initial symmetries in general, sometimes they may refuse to obey them. We then refer to “spontaneous symmetry breaking”, as it is the case …

Room temperature GeSn laser

A C2N team, in collaboration with CEA Grenoble (LETI and IRIG) and STMicroelectronics, presents the first room temperature laser with GeSn, a group IV semiconductor compatible with silicon fabrication. This major result is published in Optics Express. GeSn …

Metamaterial-Engineered Silicon Beam Splitter Fabricated with Deep UV Immersion Lithography

Subwavelength grating (SWG) metamaterials have garnered a great interest for their singular capability to shape the material properties and the propagation of light, allowing the realization of devices with unprecedented performance. However, practical SWG implementations are limited by fabrication …