Valerio Torrelli

PhD Student in Ingegneria Elettrica, Elettronica E Delle Comunicazioni , 37th cycle (2021-2024)
Department of Electronics and Telecommunications (DET)



Research topic

Multi-physics simulations of vertical-cavity surface-emitting lasers (VCSELs)


Research presentation

Video presentation


Research interests

Electronic devices: modeling and characterization
Micro- and nanotechnologies, devices, systems and applications
Modeling, simulation and CAD
Photonic devices and solar cells


I deal with multi-physics simulations of semiconductor-based opto-electronic devices using in-house TCAD (technology computer aided design) tools developed by our research group. Specifically, I deal with a specific type of laser called VCSEL (vertical-cavity surface-emitting laser), useful in many applications ranging from datacenters to gas sensing to face recognition.

To properly simulate such devices it is required to analyse them from the optical standpoint, from the electronic transport standpoint (drift-diffusion of electrons and holes) and from the thermal standpoint self-consistently. Furthermore, as technology advances, the tendency is to go towards lasers that are more and more nanostructured, thus non-negligible quantum effects can play a key role, to be included in the simulations and hardly treatable within commercial tools in a simple way.

All of these aspects, based on different physical mechanisms and on different spatial scales, represent a challenging task from the simulating point of view, which is one of the goals of our research group.


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