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Integrated diamond networks for quantum nanophotonics
Birgit J M Hausmann1, Brendan Shields, Qimin Quan
1School of Engineering and Applied Sciences, Harvard University, 33 Oxford Street, Cambridge, Massachussetts, USA.
Nano Letters
|February 21, 2012
Summary
Researchers developed an integrated nanophotonic network in diamond for single photon generation and routing. This system achieved a 10% photon extraction efficiency at room temperature using a nitrogen-vacancy center.
Area of Science:
- Quantum optics and photonics
- Solid-state physics
- Materials science
Background:
- Integrated nanophotonic networks are crucial for quantum information processing.
- Diamond is a promising material for quantum applications due to its robust properties and the presence of color centers like nitrogen-vacancy (NV) centers.
Purpose of the Study:
- To demonstrate an integrated nanophotonic network in diamond for efficient single photon generation and routing.
- To characterize the performance of the nanophotonic components, including photon extraction efficiency and resonator quality factors.
Main Methods:
- Fabrication of a diamond nanophotonic network comprising a ring resonator coupled to an optical waveguide.
- Integration of a nitrogen-vacancy (NV) color center within the ring resonator to act as a single photon source.
- Utilizing grating in- and outcouplers for optical signal management.
Main Results:
- Successful demonstration of single photon generation and routing at room temperature.
- Achieved a high overall photon extraction efficiency of 10%.
- Measured high quality factors (Q-factors) for the ring resonators: 3200 for the waveguide-coupled system and 12,600 for a bare ring.
Conclusions:
- The integrated nanophotonic network in diamond effectively enables on-chip single photon manipulation.
- The demonstrated system shows significant potential for scalable quantum technologies and photonic integrated circuits.
- High extraction efficiency and Q-factors highlight the viability of diamond as a platform for advanced photonic devices.
