Context
While the information processing demand endlessly grows, microprocessor (MP) limitations are progressively reached. This does not come from the MP cores themselves but rather from energy losses in the interconnections. Photonics could address this issue with the rise of hybrid MPs where light is used to transfer information deep to the MP core clusters. One of the essential building blocks of these new MPs will most likely be optical resonators such as microdisks. But the unknown is still in the choice of the material for their realization.
Unlike most research labs worldwide, which focus on silicon devices or heterogeneous photonic integration, the MuSTANG project proposes to explore the optical properties of microresonators realized by pseudomorphic III-V integration on silicon. We will more specifically investigate the optical nonlinearities of gallium-phosphide microdisks epitaxially grown on silicon for their potential application as laser sources, optical memories, gates, tunable filters etc.
Goals
The MuSTANG project has two main goals :
The first goal consists in the technological development of GaP-based microdisk resonators. Several issues will be under scrutiny such as the optimization of optical confinement in these structures, the geometrical tuning of the optical modes, the development of integrated coupling solutions adapted to the large band gap of GaP and last but not least the optimization of GaP-microdisk grown on Si substrates.
The second goal consists in the investigation of second order optical nonlinearities such as second harmonic generation and parametric down conversion in GaP microdisks. To that purpose an experimental setup will be develop to couple the resonators to tapered fibers for injection and detection of optical signals at different frequencies. Tailored optical nonlinearities in GaP microdisk, coupled with lasing properties, could at last lead to the development of novel photonic functionalities.
Scientific Production
see in HAL
Coordinator
Yoan LÉGER
(person in charge at SP/PLA : Yannick DUMEIGE)
Funding
40 k€
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