Room temperature single-photon emitters
Bright single-photon emitters (SPEs) are essential building blocks for quantum communication, linear optical quantum computing, and sensing as they can emit exactly one photon at a time and thus be used to encode information. However, most of those emitters require cryogenic temperatures to operate as a single photon source, which constitutes a bottleneck for large-scale (…)
AIN-on-sapphire photonic integrated circuits
 Due its wide transparency windowâspanning from the ultraviolet to the mid-infraredâ high thermal conductivity, reduced thermo-optic coefficient and the presence of both second- and third- order intrinsic optical nonlinearities, aluminum nitride (AlN) is a promising material for various integrated photonic applications be they nonlinear optics, quantum photonics and quantum metrology or biosensing. LASPEâs expertise on (…)
Optical properties of 2D-material/III-nitride van der Waals heterostructures
Our research focuses on the optical properties of hybrid van der Waals heterostructures, combining two-dimensional (2D) layered materials with III-nitride surface quantum wells (QWs). These systems provide an exciting platform to study near-field interactions and surface effects at the atomic scale, offering insights into phenomena such as surface state passivation, charge transfer, and energy transfer (…)
Surface properties of III-nitride semiconductors
We investigate the optical properties of III-nitride surface quantum wells (QWs) and the effects of advanced surface treatments, such as 2D material coatings. Our recent study [1] demonstrated a remarkable enhancement in surface QW light emission with monolayer MoSâ coating (Fig. 1), yielding a luminescence intensity comparable to QWs with conventional epitaxial caps (Fig. 2). (…)
Physics of point defects in visible III-nitride light-emitting diodes
One of the main research activities in our laboratory focuses on the investigation of the efficiency of InGaN/GaN quantum wells (QWs), the active region of visible light-emitting diodes (LEDs), which are nowadays widely used for solid-state lighting. Several defects severely impact the device performance, leading to a significant efficiency drop. For decades, dislocations have been (…)