People

Victor Torres-Company

Professor, Microtechnology and Nanoscience, Photonics Laboratory

Victor Torres-Company is Professor at the Department of Microtechnology and Nanoscience (MC2) and group leader of the Integrated Ultrafast Photonics group at Chalmers University of Technology. He obtained the PhD from the University of Valencia, Spain (2008), for which he won the Best Thesis award. Before joining Chalmers in 2012 he was a Postdoctoral Fellow at the Photonics Systems group in McGill University, Canada, and later a Marie Curie Research Fellow at Purdue University, USA. Victor’s expertise is on laser frequency comb science and technology, nonlinear integrated optics and fiber-optic communications. He has co-authored more than 100 papers in leading optics journals. He has been awarded twice a Marie Curie Fellowship and was the recipient of a European Research Council Consolidator grant. For his PhD work, he won the Best Thesis award.
ORCID: https://orcid.org/0000-0002-3504-2118

Kaiyi Wu

PhD in Electronic and Computer Engineering from the Hong Kong University of Science and Technology.
Postdoctoral researcher in Prof. Andrew Weiner’s group in Purdue University.

Kaiyi is mainly working on integration of microcomb systems. When not at work, she enjoys various types of exercise, such as playing badminton, hiking, and workout. 

Xiaomin Lyu

Xiaomin is working on advanced photonic components and the next generation of chip-based optical clocks.

In her spare time, she enjoys hiking and watching documentaries about animals and nature.

Yvan Klaver 

Yvan is working on microcomb generation, in particular the simulation and design aspect to understand and minimize the impact of noise.

In his free time, he enjoys a good boardgame and some fantasy novels. 

Mia Buchmayr

MSc. in Nanoscience and Nanotechnology from KU Leuven and Chalmers University of Technology. 

Mia joined the Integrated Ultrafast Photonics group in 2025. 

Niklas Hammerschmidt

MSc. University of Applied Sciences Cologne

Niklas joined the Integrated Ultrafast Photonics group as an industrial PhD Student in September 2024. He received his M.Sc. in mechanical engineering at the University of Applied Sciences, Cologne in cooperation with the Fraunhofer Institute of Laser Technology, Aachen. His research interests at Chalmers are octave-spanning microcombs for chip-scale optical clock technologies. His hobbies are designing and building lasers, but also hiking and fishing. 

Niklas is co-supervised by Victor Torres Company and Martin Zelan (RISE).

Tim Fuhrmann

MSc. Technical University of Darmstadt

Tim joined the Ultrafast Photonics Group in May 2024. Tim's research focuses on octave spanning microcombs. He received his B.Sc and M.Sc. degrees in Electrical Engineering and Information Technology from the University of Darmstadt (Germany) in 2021 and 2024, respectively. Moreover, he holds an M.Sc degree in Physical Engineering for Photonics and Microelectronics from the Grenoble (France) Institutes of Engineering and Management. In his free time, Tim likes to play and watch football, run and play tennis.

Vijay Shekhawat

MSc. Technical University of Denmark

Vijay completed his Bachelors degree (Nanotechnology) in 2020 from SRM Institute of Science and Technology, India and his M.Sc. (Photonics Engineering) in 2022 from Technical University of Denmark (DTU). He joined the Ultrafast Photonics Lab in September 2022. His research topic is developing parametric amplifiers on silicon nitride integrated photonics platform. He will work on the simulation of waveguides as well as their nanofabrication. Vijay is co-supervised by Victor Torres Company and Peter Andrekson.

Carmen Lopez

MSc Universidad Nacional Autónoma de México

​Carmen joined the Ultrafast Photonics Lab as a PhD student in 2022. She received her BSc degree in Telecommunications Engineering and MSc degree in Electrical Engineering from the National Autonomous University of México (UNAM).  Her research topic is microcombs for coherent optical communication systems.

Sara Persia

MSc. Royal Institute of Technology (KTH), Sweden

Sara joined the Ultrafast Photonics group at Chalmers University of Technology as a Ph.D. student in September 2022. She received her B.Sc. degree in Engineering Physics at Polytechnic University of Turin (Italy) in 2020 and her M.Sc. degree in Engineering Physics – Quantum Technologies at Royal Institute of Technology KTH (Stockholm, Sweden) in 2022. Her main topic of research is quantum information processing using ultra-low loss nanophotonics devices. Her project is about the investigation of the quantum properties of microcombs generated from silicon nitride microring resonators.

Yi Sun

MSc. Zhejiang University, China

Yi is a PhD student in the Ultrafast Photonics Laboratory. She graduated from Zhejiang University (China) in March 2021. Her research topic is the heterogeneous integration of ultralow-linewidth lasers and microcombs on the silicon nitride platform. She is learning all nanofabrication techniques for the ultra-low-loss silicon nitride waveguides and ultra-high-Q microresonators, and is constructing hybrid lasers based on microtransfer printing technology.

Postdocs

Krishna Twayana (postdoc fellow, 2023-2025) (now senior photonics engineer at Xanadu Quantum Technologies Inc.)
Fuchuan Lei (postdoc fellow, 2020-2023) (now Professor at Northeast Normal University, China)
Francisco R. Arteaga (postdoc fellow,  2019-2020) (now researcher at Max Born Institute, Germany)
Elham Nazemosadat (postdoc fellow, 2019) (now at CalSens, Spain)
Xiaonan Hu (postdoc fellow, 2018-2019) (now data scientist at Reinsight, Sweden)
Vicente Duran (Marie Curie fellow, 2014-2016) (now assistant professor at University of Jaume I, Spain)

PhD students

Yan Gao (PhD student from 2021-2025, present affiliation: Chalmers University of Technology)
YIsrael Rebolledo (PhD student from 2019-2023, present affiliation: RISE, Sweden)
Marcello Girardi (PhD student from 2018-2023, present affiliation: Iloomina AB, Sweden)
Krishna Twayana (PhD student from 2018-2023, present affiliation: Chalmers, Sweden)
Oskar B. Helgason (PhD student from 2017-2022, present affiliation: Iloomina AB, Sweden)
Zhichao Ye (PhD student from 2016-2021, present affiliation: QcoreTek Photonics, China)
Attila Fülöp (PhD student from 2013-2018) (present affiliation: Nvidia, Sweden)
Clemens Krückel (PhD student from 2012-2017) (present affiliation: IMEC, Belgium)
David Castello-Lurbe (PhD student from 2010-2014) (present affiliation: University of Valencia, Spain)