Nanophotonic UV
Over the past decade, we have developed a wide range of “building blocks” to advance nitride-integrated photonics devices. Our UV microphotoluminescence platform has been enhanced with new spectroscopy and imaging techniques, allowing us to demonstrate the first deep-UV microdisk laser, emitting at 275 nm under optical pumping, as well as a complete series of microdisk lasers spanning the blue to UV spectrum. In 2018, these microdisk lasers were integrated with a waveguide and light extraction gratings, marking a first in the field of integrated photonics with a nitride microlaser.
Currently, as part of the LUTEM project, we are exploring, for the first time, operating nanolasers with the goal of achieving sub-wavelength-scale understanding of a single nanowire. This collaboration will enable us to develop novel experiments inside an ultrafast transmission electron microscope (CEMES), facilitating the study of various GaN-based nanolasers. We will be able to map the resonances and dynamics of different optical cavity modes with sub-wavelength resolution, both at and above the laser emission threshold. This will help us describe the operating nanolaser systems, assess the gain coefficient of the amplifying material below and above the laser threshold, and relate these results to crystallographic defects and doping inhomogeneities.
References :
- Applied Physics Letters, 2020, 117, pp.121103. ⟨10.1063/5.0015252⟩ https://hal.science/L2C/hal-02946015v1
- Optics Letters, 2020, 45 (15), pp.4276-4279. ⟨10.1364/OL.395371⟩ https://hal.science/L2C/hal-02908380v1
- Scientific Reports, 2019, 9, pp.18095. ⟨10.1038/s41598-019-54416-3⟩ https://hal.science/L2C/hal-02393815v1
- Applied Physics Letters, 2016, 109 (23), pp.231101. ⟨10.1063/1.4971357⟩ https://hal.science/L2C/hal-01469387v1
Recent theses :
- SANTINI Cléo (2023-2026)