 The emerging strategy to
overcome the limitations of bulk quantum optics experiments consists of taking
advantage of the robustness and compactness of the integrated waveguide
technology. Indeed, high-quality quantum photonic circuits can be conveniently
realized by femtosecond laser waveguide writing, exploiting the unique features
of this fabrication technique. The high processing speed enables
to produce with low cost and rapid turnaround many different circuit designs,
easing the experimental testing of new ideas. The unique three-dimensional
capabilities empower the design of devices and circuit configurations with
novel functionalities and enhanced compactness. In addition, the low
birefringence of femtosecond laser written waveguides makes them suitable for
propagating qubits encoded in the polarization degree of freedom. Several applications have
been addressed up to now, in the fields of quantum computing, quantum simulation and quantum metrology. An integrated CNOT logic gate has been realized. Circuits integrating tens of optical components in a single chip, injected with entangled two-photon states, have enabled to simulate the dynamics of bosonic or fermionic pairs of particles undergoing quantum walks. An optofluidic chip for quantum biosensing has been demonstrated. Collaborations: F. Sciarrino and P. Mataloni (La Sapienza Università), M. Lobino and J. O'Brien (Bristol University)
|
Research > Femtosecond Laser Micromachining >
