- Single photon avalanche detectors (SPAD)
The lab is a pioneer in this field and presently has the leadership at an international level in developing Single Photon Avalanche Diodes and the related electronics. We have introduced the “active-quenching circuit” (AQC) concept, which opened the way to the practical application of this kind of detectors and for the first time developed monolithically integrated AQCs that are needed in miniaturised analytical systems. The lab designed several generations of silicon SPAD (single pixel and arrays) with innovative topologies, producing the devices thanks to the strict scientific collaboration, intensified in the last years, with the Microelectronics and Microsystems Institute of CNR, Sezione di Bologna. The lab also opened the way to “photon counting and timing” in the infrared energy spectrum (wavelength above 1 micron) carrying out important researches on Germanium and InGaAs/InP diodes.
- SPAD applications
The lab applied SPAD and AQC in different fields in collaboration with several research laboratories at an international level. Since several years, the major applications are in the field of micro- and nano-analytical systems for DNA and protein analysis, of molecular imaging, of time-resolved near-infrared spectroscopy, of optical testing of VLSI integrated circuits.
Fig. 1. Instrumentation for electrical and optical characterization of single-photon detectors
Fig. 2. Design and development of electronics for single-photon detectors and related applications
Copyright © Ing. Giorgio Uccellini 2009
The activity takes place in laboratories located in Building 24 of the electronics section of DEI, in C. Golgi 40.