A5061784963- Diamond and Carbon-based Materials Research
- Advanced Fiber Laser Technologies
- Electronic and Structural Properties of Oxides
- Photonic and Optical Devices
- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Mechanical and Optical Resonators
- Quantum and electron transport phenomena
- Photonic Crystals and Applications
- Advanced Surface Polishing Techniques
- High-pressure geophysics and materials
- Plasmonic and Surface Plasmon Research
- Force Microscopy Techniques and Applications
- Neural Networks and Reservoir Computing
- Optical Coatings and Gratings
- Molecular Communication and Nanonetworks
- Semiconductor Quantum Structures and Devices
- Optical Network Technologies
- Nonlinear Optical Materials Research
- Atomic and Subatomic Physics Research
- Nonlinear Optical Materials Studies
- Molecular spectroscopy and chirality
- Cold Atom Physics and Bose-Einstein Condensates
- Radio Frequency Integrated Circuit Design
- Advanced MEMS and NEMS Technologies
Massachusetts Institute of Technology
2020-2024
Cornell University
2024
University of Arizona
2024
Cambridge Electronics (United States)
2020
Harvard University
2020
Tin-vacancy centers in diamond are promising spin-photon interfaces owing to their high quantum efficiency, large Debye-Waller factor, and compatibility with photonic nanostructuring. Benchmarking single-photon indistinguishability is a key challenge for future applications. Here, we report the generation of single photons 99.7_{-2.5}^{+0.3}% purity 63(9)% from resonantly excited tin-vacancy center single-mode waveguide. We obtain control optical transition 1.71(1)-ns-long π pulses 77.1(8)%...
Abstract A contemporary challenge for the scalability of quantum networks is developing nodes with simultaneous high photonic efficiency and long-lived qubits. Here we present a fibre-packaged nanophotonic diamond waveguide hosting tin-vacancy centre spin-1/2 117 Sn nucleus. The interaction between electronic nuclear spins results in signature 452(7) MHz hyperfine splitting. This exceeds natural optical linewidth by factor 16, enabling direct spin initialization 98.6(3)% fidelity single-shot...
A quantum register coupled to a spin-photon interface is key component in communication and information processing. Group-IV color centers diamond (SiV−, GeV−, SnV−) are promising candidates for this application, comprising an electronic spin with optical transitions nuclear as the register. However, creation of these deterministic strong coupling remains challenging. Here, we make first-principles predictions hyperfine parameters group-IV centers, which verify experimentally comprehensive...
Color centers in diamond have emerged as leading solid-state artificial atoms for a range of quantum technologies, from sensing to networks. Concerted research activities are now underway identify new color that combine stable spin and optical properties the nitrogen vacancy (NV$^-$) with spectral stability silicon (SiV$^-$) diamond, recent identifying other group IV superior properties. In this Letter, we investigate class emitters first principles, III centers, which show be...
Modern low-temperature large-scale systems, such as high-sensitivity IR/THz imaging arrays and quantum computers, require massive signal connections between the cooled system core external room-temperature (RT) components. An error-protected computer needs thousands or even millions of qubits operating at cryogenic temperature. Albeit rapid development highly-integrated processors [1], future scalability may still be largely limited by cables connecting peripheral control/processing units...
Group-IV color centers in diamond are a promising platform for quantum entanglement distribution experiments. However, they suffer from phonon-mediated decoherence mechanism that limits the maximum temperature at which can operate. This theoretical work develops model accurately predicts coherence time, and further regimes be extended, potentially leading to higher-temperature operation.
Abstract Artificial atom qubits in diamond have emerged as leading candidates for a range of solid-state quantum systems, from sensors to repeater nodes memory-enhanced communication. Inversion-symmetric group IV vacancy centers, comprised Si, Ge, Sn, and Pb dopants, hold particular promise their neutrally charged electronic configuration results ground-state spin triplet, enabling long coherence above cryogenic temperatures. However, despite the tremendous interest these defects,...
We introduce a quantum system-on-chip (QSoC) architecture based on (I) co-designed diamond memory array, (II) custom CMOS backplane, and (III) protocol for fully connected cluster state generation.
A contemporary challenge for the scalability of quantum networks is developing nodes with simultaneous high photonic efficiency and long-lived qubits. Here, we present a fibre-packaged nanophotonic diamond waveguide hosting tin-vacancy centre spin-1/2 $^{117}$Sn nucleus. The interaction between electronic nuclear spins results in signature 452(7) MHz hyperfine splitting. This exceeds natural optical linewidth by factor 16, enabling direct nuclear-spin initialisation 98.6(3)% fidelity...
Color centers in diamonds have emerged as a leading solid-state platform for advancing quantum technologies, satisfying the DiVincenzo criteria and recently achieving advantage secret key distribution. Recent theoretical works estimate that general-purpose computing using local communication networks will require millions of physical qubits to encode thousands logical qubits, which presents substantial challenge hardware architecture at this scale. To address unanswered scaling problem,...
Artificial atom qubits in diamond have emerged as leading candidates for a range of solid-state quantum systems, from sensors to repeater nodes memory-enhanced communication. Inversion-symmetric group IV vacancy centers, comprised Si, Ge, Sn and Pb dopants, hold particular promise their neutrally charged electronic configuration results ground-state spin triplet, enabling long coherence above cryogenic temperatures. However, despite the tremendous interest these defects, theoretical...
A quantum register coupled to a spin-photon interface is key component in communication and information processing. Group-IV color centers diamond (SiV, GeV, SnV) are promising candidates for this application, comprising an electronic spin with optical transitions nuclear as the register. However, creation of these deterministic strong coupling remains challenging. Here, we make first-principles predictions hyperfine parameters group-IV centers, which verify experimentally comprehensive...
Group-IV color centers in diamond (SiV, GeV, SnV) have emerged as leading solid-state spin-photon interfaces for quantum information processing applications. However, these qubits require cryogenic temperatures to achieve high fidelity operation due interactions with the thermal phonon bath. In this work, we: (i) derive a detailed model of decoherence from first-order acoustic processes acting on spin-orbit fine structure centers; (ii) demonstrate agreement model's predicted coherence times...
<title>Abstract</title> Integrating nanophotonics with electronics promises revolutionary applications ranging from light detection and (LiDAR) to holographic displays. Although semiconductor manufacturing of in Silicon Photonic foundries is maturing, realizing active the ubiquitous bulk CMOS processes remains challenging. We introduce a fabless approach embed by co-designing back-end-of-line metal layers for optical functionality. Without changing any design rules imposed 65 nm process, we...
Color centers are defects within crystals that trap charge carriers in optically accessible levels. In diamonds, these color hold great potential for use quantum sensing and information. The utilization of the nitrogen vacancy (NV) center situated diamond has allowed demonstrations magnetic field, electric strain, temperature sensors [1]. more recent times, investigation employing group-IV elements, such as SiV, GeV, SnV, gained interests [2]. This interest is attributed to their zero dipole...
We experimentally demonstrate the integration of 128 waveguide-coupled diamond spin qubits with aluminum nitride photonics. This large-scale, tunable, efficient and optically coherent multi-qubit platform sets stage for high-rate entanglement distribution in a large quantum network.
We create nanophotonic devices using CMOS foundry processes where the top metal layers exhibit a plasmonic resonance. By integrating liquid crystals and applying bias, we measure 20 nm resonance shift at ~700 nm.
We present an efficient microwave and optical interface for quantum memories at 1.3 K based on tin-vacancy color centers in diamond scalable integrated photonics.
<title>Abstract</title> Color centers in diamonds have emerged as a leading solid-state platform for advancing quantum technologies, satisfying the DiVincenzo criteria and recently achieving advantage secret key distribution. Recent theoretical works estimate that general-purpose computing using local communication networks will require millions of physical qubits to encode thousands logical qubits, which presents substantial challenge hardware architecture at this scale. To address...
We show that metallic wires in CMOS chips can provide dual functionalities as electronic interconnects and plasmonic/metamaterial devices. demonstrate plasmonic resonances a chip fabricated bulk Si foundry (TSMC, 65 nm node). Through minimal post processing, we integrate the designed nanophotonic with liquid crystals high-speed crystal-based electro-optic modulator.
Integrating nanophotonics with electronics promises revolutionary applications, from LiDAR to holographic displays. Although silicon photonics is maturing, realizing active in the ubiquitous bulk CMOS processes remains challenging. We introduce a fabless approach embed by co-designing back-end-of-line metal layers for optical functionality. Using 65nm process, we create plasmonic liquid crystal modulators switching speeds 100x faster than commercial technologies. This zero-change method...
Tin-vacancy centres in diamond are spin-photon interfaces with intrinsic environmental noise insensitivity. We reveal their high optical coherence a nanostructured environment and generate single photons 99.7% purity an indistinguishability of 63(9)%. [1]