Invited talk by G. Volpe at SCOP2020, 25 September 2020

Student Conference on Optics and Photonics (SCOP), organized by the OSA student chapter of the Physical Research Laboratory, Ahmedabad, India.

Giovanni Volpe will give an online invited presentation at the Student Conference on Optics and Photonics (SCOP), organized by the OSA student chapter of Physical Research Laboratory, Ahmedabad, India.

The conference addresses various topics in optics with an emphasis on non linear optics and quantum optics, will be held during 23-25 September, 2020 at the Physical Research Laboratory (PRL), Ahmedabad, India.
The conference includes invited talks by eminent scientists from India and abroad, as well as posters and oral presentations by student participants and research fellows.

The contribution of Giovanni Volpe will be presented according to the following schedule:

Giovanni Volpe
Deep Learning for microscopy and optical trapping
Date: 25 September 2020
Time: 15:10 IST (GMT+5:30)
Place: Online

Career Seminar by OSA Ambassador Aura Higuera Rodriguez, 6 October 2020

Aura Higuera, Technical Account Manager PIC technology and Optical Society Ambassador

The OSA Chapter of Gothenburg together with the Association of Graduate Students in Physics (FFF) will organise an online career talk by Aura Higuera Rodriguez, OSA ambassador and Technical Account Manager at Synopsys Photonic Solutions. The seminar will take place online via Zoom on Tuesday 6th of October at 5 pm.

Aura completed her PhD at Eindhoven University of Technology in the photonic integration group. Afterwards, she worked at the Photonic Integration Technology Center as JePPIX Coordinator and Application Support and since January 2019 she joined Synopsys Photonic Solutions as Technical Account Manager. More about Aura on the OSA website .

Aura is among the OSA Ambassadors 2020 and her talk will focus on Career Development and Emotional Intelligence. The seminar is open to all members of the University of Gothenburg and Chalmers University of Technology via registration using the institutional email.

The seminar will be held on Zoom and the link will be available one hour before the start. To attend the talk, please register on   For information or questions you can contact OSA-GU at or FFF at

Place: Zoom (online)
Date: 6 October 2020
Time: 17:00 CET

New OSA chapter established at Gothenburg University!

Screenshot of the GU-OSA Student Chapter kick-off meeting, autumn semester 2020.

A new student chapter of the Optical Society of America (OSA) has been established at the Physics Department of Gothenburg University!

The founding members of the GU-OSA student chapter are students from the Soft Matter Lab, the Biophysics Group, and Optical Levitation Group, all part of the Physics Department of Gothenburg University. The chapter activity started on the autumn semester of 2020 with the online kick-off meeting, where the future plans and activities of the GU-OSA chapter were discussed.

The Optical Society of America (OSA) supports outreach and networking through the student chapters. So far, there are over 370 Student Chapter across the world organising events such as seminars, colloquiums, and outreach activities focused on increasing awareness of the importance of optics in our daily life and society.

To keep you updated on the GU-OSA student chapter activities, follow us on social media:
Facebook: OSA-GU Student chapter

or contact us via email:

Non-equilibrium properties of an active nanoparticle in a harmonic potential on ArXiv

Non-spherical nanoparticle held by optical tweezers. The particle is trapped against the cover slide.

Non-equilibrium Properties of an Active Nanoparticle in a Harmonic Potential
Falko Schmidt, Hana Šípovà-Jungová, Mikael Käll, Alois Würger & Giovanni Volpe
arXiv: 2009.08393

Active particles break out of thermodynamic equilibrium thanks to their directed motion, which leads to complex and interesting behaviors in the presence of confining potentials. When dealing with active nanoparticles, however, the overwhelming presence of rotational diffusion hinders directed motion, leading to an increase of their effective temperature, but otherwise masking the effects of self-propulsion. Here, we demonstrate an experimental system where an active nanoparticle immersed in a critical solution and held in an optical harmonic potential features far-from-equilibrium behavior beyond an increase of its effective temperature. When increasing the laser power, we observe a cross-over from a Boltzmann distribution to a non-equilibrium state, where the particle performs fast orbital rotations about the beam axis. These findings are rationalized by solving the Fokker-Planck equation for the particle’s position and orientation in terms of a moment expansion. The proposed self-propulsion mechanism results from the particle’s non-sphericity and the lower critical point of the solute.

Jesús Pineda joins the Soft Matter Lab

Jesús Pineda starts his PhD at the Physics Department of the University of Gothenburg on 16th September 2020.

Jesús has a Master degree in Electrical and Electronic Engineering at the Universidad Tecnológica de Bolívar, Cartagena, Colombia.

In his PhD, he will focus on Microscopy and Deep Learning.

Gustaf Sjösten joins the Soft Matter Lab

Gustaf Sjösten joined the Soft Matter Lab on 1 September 2020.

Gustaf Sjösten is a Master student in the Complex Adaptive Systems Master at Chalmers University of Technology.

He will work on his Master thesis on the characterization of nanoparticles in nanochannels with machine learning methods.

Agaton Fransson joins the Soft Matter Lab

Agaton Fransson joined the Soft Matter Lab on 1 September 2020.

Agaton Fransson is a Master student in the Complex Adaptive Systems Master at Chalmers University of Technology.

He will work on his Master thesis on the development of a neural network to track and identify different types of plankton.