Integrated sources of entangled photons at telecom wavelength in femtosecond-laser-written circuits
Posted on 2018-03-19 - 14:02
Photon entanglement is at the basis of many protocols in photonic quantum technologies, from quantum computing, to simulation and sensing. The generation of entangled photons in integrated waveguides is particularly advantageous due to the enhanced stability and more efficient nonlinear
interaction. Here we realize an integrated source of entangled wavelength-degenerate photons, based on the hybrid interfacing of photonic circuits in different materials, all inscribed by femtosecond laser pulses. We show that our source, based on spontaneous parametric down-conversion at telecom wavelength, gives access to different classes of output states, allowing to switch from path-entangled to polarization-entangled states with net visibilities above 0.92 for all selected combinations of integrated devices.
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Atzeni, Simone; Rab, Syed Adil; Corrielli, Giacomo; Polino, Emanuele; Valeri, Mauro; Mataloni, Paolo; et al. (2018). Integrated sources of entangled photons at telecom wavelength in femtosecond-laser-written circuits. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4012135.v1
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AUTHORS (10)
SA
Simone Atzeni
SR
Syed Adil Rab
GC
Giacomo Corrielli
EP
Emanuele Polino
MV
Mauro Valeri
PM
Paolo Mataloni
NS
Nicolo Spagnolo
AC
Andrea Crespi
FS
Fabio Sciarrino
RO
Roberto Osellame