Quantum photonics devices such as front-illuminated single-photon avalanche diodes (SPAD) or Vertical Cavity Surface Emitting Lasers (VCSEL) have a clear benefit in quantum efficiency from micro-optics. For a light sensor, e.g. single-photon counting detectors or imagers, microlenses are used to redirect photons initially impinging on the pixel surrounding electronics into the photosensitive surface/volume of the photosensitive device, i.e. increasing the quantum collection efficiency dramatically. Other quantum devices such as atomic clocks benefit from diffractive nano-optics to be more affordable to produce, more compact and reliable.

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Bio

Guillaume Basset is an expert in micro-optics, optical document security, diffractive and subwavelength optics, resonant waveguide-gratings and micro-nano structuration. He graduated in 2007 from INP Grenoble, Politecnico di Torino and EPFL in nanotechnologies for integrated systems. G. Basset has managed various projects developing new security features for banknotes, ID documents and brand protection, new micro-optics for various industries such as space, telecom/datacom, consumer electronics, lasers, biology etc. He has developed and optimized new processes to originate and replicate micro and nano-optical structures. He is now leading the micro and nano-optics group at CSEM SA.