Efficient Extraction of Zero-Phonon-Line Photons from Single Nitrogen-Vacancy Centers in an Integrated GaP-on-Diamond Platform

Gould, Michael N.; Schmidgall, E. R.; Dadgostar, Shabnam; Hatami, Fariba; Fu, Kai-Mei C.

doi:10.1103/physrevapplied.6.011001

Cited by 73 publications

(82 citation statements)

References 45 publications

(72 reference statements)

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“…The described transfer process was used due to its compatibility with transfer to mm-scale diamond chips for quantum information applications using the process described in Refs. [50][51][52]. Recently, wafer-scale GaP membrane transfer to silicon oxide has been realized by other groups via direct wafer bonding followed by substrate removal [45,53].…”

Section: Fabrication and Testingmentioning

confidence: 99%

400%/W second harmonic conversion efficiency in 14 μm-diameter gallium phosphide-on-oxide resonators

et al. 2018

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Second harmonic conversion from 1550 nm to 775 nm with an efficiency of 400% W −1 is demonstrated in a gallium phosphide (GaP) on oxide integrated photonic platform. The platform consists of doubly-resonant, phase-matched ring resonators with quality factors Q ∼ 10 4 , low mode volumes V ∼ 30(λ/n) 3 , and high nonlinear mode overlaps. Measurements and simulations indicate that conversion efficiencies can be increased by a factor of 20 by improving the waveguide-cavity coupling to achieve critical coupling in current devices.

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Section: Fabrication and Testingmentioning

confidence: 99%

400%/W second harmonic conversion efficiency in 14 μm-diameter gallium phosphide-on-oxide resonators

et al. 2018

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“…Based on the GaP‐on‐diamond hybrid system, coupling of NV centers to waveguides and to optical resonators has been demonstrated. Recently, an integrated system combining waveguide‐coupled microdisk resonators and grating couplers to couple out photons from NV centers have been published, demonstrating the potential of this hybrid platform for quantum communication applications (see Figure a,b).…”

Section: Coupling Color Centers To Photonic Structuresmentioning

confidence: 99%

Section: Coupling Color Centers To Photonic Structuresmentioning

confidence: 99%

Diamond as a Platform for Integrated Quantum Photonics

Lenzini¹,

Gruhler²,

Walter³

et al. 2018

Adv Quantum Tech

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Integrated quantum photonics enables the generation, manipulation, and detection of quantum states of light in miniaturized waveguide circuits. Implementation of these three operations in a single integrated platform is a crucial step toward a fully scalable approach to quantum photonic technologies. In this context, diamond has emerged as a particularly promising material as it naturally combines a large transparency range for the fabrication of low‐loss photonic circuits, and a variety of optically active defects for the realization of efficient single‐photon emitters. Furthermore, its high Young's modulus makes it ideal for the implementation of tunable optomechanical devices for active quantum state manipulation. This review reports recent progress on the realization of the main components required for a diamond‐based integrated quantum photonic architecture: single‐photon emitters, static and actively tunable waveguide circuits, and, as a last building block, integrated superconducting single‐photon detectors.

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“…22 Details on device fabrication and yield can be found in Ref. [19] and in the Supplemental Information (SI).…”

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confidence: 99%

“…19 There are several NV centers that couple to the cavity mode for this particular disk resonator. With the cavity mode tuned to resonance with two NV centers, we apply a square wave bias voltage (Figure 2 applied bias voltage (yellow arrow) and a third displays a large spectral diffusion (∼ 70…”

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confidence: 99%

Frequency Control of Single Quantum Emitters in Integrated Photonic Circuits

et al. 2018

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Generating entangled graph states of qubits requires high entanglement rates, with efficient detection of multiple indistinguishable photons from separate qubits. Integrating defect-based qubits into photonic devices results in an enhanced photon collection efficiency, however, typically at the cost of a reduced defect emission energy homogeneity. Here, we demonstrate that the reduction in defect homogeneity in an integrated device can be partially offset by electric field tuning. Using photonic device-coupled implanted nitrogen vacancy (NV) centers in a GaP-on-diamond platform, we demonstrate large field-dependent tuning ranges and partial stabilization of defect emission energies. These results address some of the challenges of chip-scale entanglement generation. 19 NV centers within ∼ 15 nm of the diamond surface, created via implantation and annealing, couple evanescently with the GaP layer. As a result of the static dipole moment of the defect's excited state, there is variation in emission energy both between different defects, due to variation in the local environment caused by implantation and processing damage, and in the emission energy of a single defect over time due to electric field fluctuations. However, this dipole moment also enables electric field control of the defect's emission energy. 6,15,20,21 We provide this control through the addition of Ti/Au electrodes to this GaP-on-diamond photonics platform.In the photonic devices used in these experiments, 22Measurements were performed between 12-14 K in a closed-cycle He cryostat. A 532 nm laser was used for optical excitation, focused onto the sample with a 0.7 NA microscope objective. Photoluminescence (PL) was collected from the grating coupler using the same objective, coupled into a grating spectrometer, and detected by a CCD camera (Figure 1(a)).The input and collection optical paths were separated by a 562 nm dichoric beamsplitter.Bias voltages were applied using a computer-controlled piezocontroller in the range of 0-100 V.We first demonstrate electric-field tuning of a waveguide-coupled NV center. Exciting We also electrically control the emission energy of a resonator-coupled NV center. We first tune the cavity mode of a waveguide-coupled disk resonator onto NV ZPL resonance via Xe gas deposition, while collecting the PL emission from the waveguide grating coupler.The Xe gas deposition results in a redshift of the resonator cavity mode. Figure 2 (b, left) shows the resulting Xe gas tuning curve for one disk resonator. Xe gas flow is halted from t ∼ 15 minutes to t ∼ 45 minutes to perform two voltage experiments and then resumed.NV centers that couple with the cavity mode are bright when in resonance with the cavity mode and not visible otherwise.19 There are several NV centers that couple to the cavity mode for this particular disk resonator. With the cavity mode tuned to resonance with two NV centers, we apply a square wave bias voltage (Figure 2(b)), and we see the two ZPL emission lines moving in response to the applied ...

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Efficient Extraction of Zero-Phonon-Line Photons from Single Nitrogen-Vacancy Centers in an Integrated GaP-on-Diamond Platform

Cited by 73 publications

References 45 publications

400%/W second harmonic conversion efficiency in 14 μm-diameter gallium phosphide-on-oxide resonators

400%/W second harmonic conversion efficiency in 14 μm-diameter gallium phosphide-on-oxide resonators

Diamond as a Platform for Integrated Quantum Photonics

Frequency Control of Single Quantum Emitters in Integrated Photonic Circuits

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