QUDOS 8th Plenary Meeting

January 2026 - QUDOS researchers gather at the University of Cambridge for 8th plenary meeting

More than 20 researchers from the four universities of QUDOS consortium (namely the University of Cambridge, Cardiff University, University of Southampton and UCL) gathered at Cambridge for the 8^th plenary meeting of the QUDOS Programme Grant on 12 January 2026. This plenary meeting was a consortium members-only meeting for detailed technical discussion of the project developments.

With a little more than one year before the expected completion of the QUDOS programme, Alwyn Seeds, Principal Investigator from UCL, started the meeting by highlighting the milestones and deliverables achieved, and the major challenges for the remaining part of the programme.

Researchers from the four universities then gave talks on the developments of their specific projects. Jae-Seong Park, Chong Chen and Hui Jia of UCL described recent advances in high temperature operation of all-MBE InAs/GaAs quantum dot lasers on V-groove (001) Si, InAs/GaAs quantum dot on patterned Si, high-gain multi-layer InAs/GaAs quantum dot lasers with 25 nm GaAs spacer layers, and InAs/InAlGaAs Quantum Dot Lasers on InP and Si under P1.

Jae-Seong Park, UCL	Chong Chen, UCL (who was also presenting on behalf of Mingchu Tang)
Hui Jia, UCL	Researchers listened to the presentations attentively

Lifeng Bao and Michele Paparella of the University of Southampton talked about the continuous wave InAs/GaAs QD laser integrated on V-grooved Si(100) substrate, and the integrated devices for gain, lasing, modulation and detection under P2.

Lifeng Bao, University of Southampton	Michele Paparella, University of Southampton

Finally, researchers of P3 and P4 presented in the same session given the close relationship of the two projects on integration and demonstrators. Pawan Mishra and Dun Qiao of the Cardiff University talked about the progress of intermixing, and the progress of tuneable laser and SS-OCT. Solomon McKiernan of UCL talked about the design of high-speed modulators in the QUDOS platform. Chunhui Yao of the University of Cambridge talked about the progress on photonic switch fabrics, and the progress on optical spectrometers.

Pawan Mishra, Cardiff University	Dun Qiao, Cardiff University
Solomon McKiernan, UCL	Chunhui Yao, University of Cambridge (who was also presenting on behalf of Yang Shi)

Researchers from the four universities also took the opportunity to highlight their research work through presentations, poster displays and informal exchange during tea and lunch breaks.

Throughout the plenary meeting, there were lively and intense exchange and discussions among researchers, providing useful insights for the further development of the programme to advance QUDOS’ goal of comprehensive optical integration on silicon.