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A monolithically integrated polarization entangled photon pair source on a silicon chip.


ABSTRACT: Integrated photonic circuits are one of the most promising platforms for large-scale photonic quantum information systems due to their small physical size and stable interferometers with near-perfect lateral-mode overlaps. Since many quantum information protocols are based on qubits defined by the polarization of photons, we must develop integrated building blocks to generate, manipulate, and measure the polarization-encoded quantum state on a chip. The generation unit is particularly important. Here we show the first integrated polarization-entangled photon pair source on a chip. We have implemented the source as a simple and stable silicon-on-insulator photonic circuit that generates an entangled state with 91 ± 2% fidelity. The source is equipped with versatile interfaces for silica-on-silicon or other types of waveguide platforms that accommodate the polarization manipulation and projection devices as well as pump light sources. Therefore, we are ready for the full-scale implementation of photonic quantum information systems on a chip.

SUBMITTER: Matsuda N 

PROVIDER: S-EPMC3495342 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature

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A monolithically integrated polarization entangled photon pair source on a silicon chip.

Matsuda Nobuyuki N   Le Jeannic Hanna H   Fukuda Hiroshi H   Tsuchizawa Tai T   Munro William John WJ   Shimizu Kaoru K   Yamada Koji K   Tokura Yasuhiro Y   Takesue Hiroki H  

Scientific reports 20121112


Integrated photonic circuits are one of the most promising platforms for large-scale photonic quantum information systems due to their small physical size and stable interferometers with near-perfect lateral-mode overlaps. Since many quantum information protocols are based on qubits defined by the polarization of photons, we must develop integrated building blocks to generate, manipulate, and measure the polarization-encoded quantum state on a chip. The generation unit is particularly important.  ...[more]

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