Renzoni's group is internationally recognized as a pioneer in electromagnetic induction imaging (EMI) with optical atomic magnetometers. Research directions: (1) All-optical 87Rb atomic magnetometer MIT — demonstrated first magnetic induction tomography (MIT) with atomic magnetometers (2013), first EMI of biological tissues below the 1 Sm⁻¹ threshold (Applied Physics Letters 2020), enabling non-invasive cardiac conductivity imaging; (2) Unshielded RF atomic magnetometer operation with general regression neural network auto-optimization; (3) Non-destructive evaluation — industrial corrosion/defect imaging via quantum-sensitive MIT; (4) Sub-Fourier signal processing with nonlinear systems for frequency resolution beyond classical limits. Collaborates with NPL on quantum sensing standards. Applications span medicine (atrial fibrillation), security, and materials inspection.

The LARISSA group develops multi-step resonance ionization laser spectroscopy and RIMS: element- and isotope-selective laser ionization used both as an ultratrace analytical technique (actinide detection at extreme selectivity, environmental and nuclear-forensic samples) and as a spectroscopy tool for exotic and short-lived isotopes, feeding ion-source development for facilities such as ISOLDE/CERN. A major current thrust is the atomic and ionic spectroscopy of thorium, including the 229mTh isomer that underpins the nuclear-clock effort, done jointly with Schmidt-Kaler's trap group and Duellmann's nuclear chemistry. Relative to the established NV-ensemble quantum-sensing playbook (DEER, nanoscale NMR, T1 relaxometry at pT/sqrt(Hz) ensemble sensitivity), the transferable capability here is selective, quantum-state-resolved detection of single atoms/ions -- the readout problem, approached spectroscopically rather than magnetically.