Article
Chemistry, Multidisciplinary
Alexander Wood, Artur Lozovoi, Zi-Huai Zhang, Sachin Sharma, Gabriel I. Lopez-Morales, Harishankar Jayakumar, Nathalie P. de Leon, Carlos A. Meriles
Summary: Using confocal fluorescence microscopy, we observe the charge interconversion process between all three charge states of the silicon vacancy (SiV) center in diamond at room temperature. We uncover the two-step capture process of diffusing, photogenerated holes that leads to the formation of SiV0, and demonstrate the reverse process induced by continuous red illumination. These findings provide insight into the charge dynamics of SiV and hold promise for nanoscale sensing and quantum information processing.
Article
Chemistry, Physical
Mariusz Mrozek, Mateusz Schabikowski, Marzena Mitura-Nowak, Janusz Lekki, Marta Marszalek, Adam M. Wojciechowski, Wojciech Gawlik
Summary: The experimental study focused on the longitudinal and transverse relaxation of negatively charged nitrogen-vacancy centers in diamond monocrystals prepared by 1.8 MeV proton implantation. Results showed that proton implantation technique can be versatile in controlling the production of nitrogen-vacancy color centers in thin films.
Article
Chemistry, Multidisciplinary
Andris Berzins, Hugo Grube, Einars Sprugis, Guntars Vaivars, Ilja Fescenko
Summary: This study investigates the implantation of helium ions into diamonds to create NV layers. By measuring various parameters, it is found that increasing the implantation dose improves the magnetic sensitivity of the sensors. Additionally, subsequent annealing only has a slight impact on sensitivity.
Article
Physics, Applied
Shahriar Aghaeimeibodi, Daniel Riedel, Alison E. Rugar, Constantin Dory, Jelena Vuckovic
Summary: The study investigates the electrical tuning of Sn-V- centers in diamond through the direct-current Stark effect, demonstrating a tuning range beyond 1.7 GHz with both quadratic and linear dependence on the applied electric field. The researchers confirm that the observed tuning effect is a result of the applied electric field, distinct from thermal tuning due to Joule heating, suggesting Stark tuning as a promising avenue to overcome detunings between emitters and enabling the realization of multiple identical quantum nodes.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Physical
Chengyuan Yang, Zhaohong Mi, Huining Jin, Thirumalai Venkatesan, Ratnakar Vispute, Andrew A. Bettiol
Summary: We report a method for large-scale fabrication of negatively charged Silicon-vacancy (SiV-) centers in diamond membranes using MeV Helium ion implantation. Despite the polycrystalline structure of the diamond membranes, the SiV- centers exhibit a fluorescence lifetime comparable to those fabricated in single crystal diamonds. Patterning of SiV- centers with varying densities is demonstrated using a focused ion beam.
Article
Quantum Science & Technology
Lukas Hunold, Stefano Lagomarsino, Assegid M. Flatae, Haritha Kambalathmana, Florian Sledz, Silvio Sciortino, Nicla Gelli, Lorenzo Giuntini, Mario Agio
Summary: This research presents the scalable production of silicon-vacancy color centers in single-crystal diamond by ion implantation for the fabrication of quantum emitters. The lateral position of SiV is spatially controlled using a 1-micrometer pinhole, while the initial implantation position is monitored by ion beam position and scattering through the pinhole. This study also discusses the role of ions scattered by the pinhole and the activation yield of SiV color centers for the creation of single quantum emitters.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Materials Science, Multidisciplinary
Takeyuki Tsuji, Hitoshi Ishiwata, Takeharu Sekiguchi, Takayuki Iwasaki, Mutsuko Hatano
Summary: Diamond film sensors with large volumes and perfectly aligned NV ensembles, synthesized using MPCVD, have the potential for highly sensitive quantum magnetometers. This study achieved a high growth rate and contrast of diamond film containing perfectly aligned NV ensembles by using high power density plasma and controlling gas flow rate ratios. The EPR spectroscopy and Ramsey sequence results confirmed the high quality of the obtained diamond sensor films.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Tobias Luehmann, Severine Diziain, Jan Meijer, Sebastien Pezzagna
Summary: This study reveals that the ST1 center is composed of oxygen and lattice defects. The involvement of oxygen is confirmed through two independent experiments. Moreover, it is found that oxygen implantation at 1200 degrees C with energy ranging from 6 to 50 keV can create ST1 centers with low efficiency. The addition of vacancies and thermal treatment can further activate oxygen into ST1 centers.
Article
Quantum Science & Technology
Takeyuki Tsuji, Takeharu Sekiguchi, Takayuki Iwasaki, Mutsuko Hatano
Summary: Extending the spin-dephasing time of NV centers in CVD diamonds can enhance the magnetic sensitivity. The study shows that adjusting the misorientation angle can mitigate stress distribution and increase the spin-dephasing time of NV centers.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
A. M. Zaitsev, N. M. Kazuchits, K. S. Moe, J. E. Butler, O. V. Korolik, M. S. Rusetsky, V. N. Kazuchits
Summary: The study revealed a close relationship between the 468 nm center and vacancy clusters in brown CVD diamonds, with the former being a highly sensitive indicator of trace vacancy clusters. This center was found in practically every grown CVD diamond, including colorless diamonds of high structural perfection and purity.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Physics, Multidisciplinary
He Jian, Jia Yan-Wei, Tu Ju-Ping, Xia Tian, Zhu Xiao-Hua, Huang Ke, An Kang, Liu Jin-Long, Chen Liang-Xian, Wei Jun-Jun, Li Cheng-Ming
Summary: Shallow nitrogen-vacancy centers can be created in diamond through low energy carbon ion implantation and vacuum annealing. The mechanism of transformation of nitrogen-vacancy centers in diamond was studied using Raman spectroscopy, X-ray photoelectron spectroscopy, and positron annihilation analysis.
ACTA PHYSICA SINICA
(2022)
Article
Materials Science, Multidisciplinary
Arne Goetze, Nico Striegler, Alastair Marshall, Philipp Neumann, Christian Giese, Patricia Quellmalz, Peter Knittel
Summary: The process of creating NV centers on single-crystalline diamond microstructures by chemical vapor deposition (CVD) allows for control of the NV center positions, resulting in exclusive generation of NV centers on the {111} pyramid side faces and preferential alignment in a single {111} direction with a T 2 time of 55 µs.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Vadim Sedov, Artem Martyanov, Ivan Tiazhelov, Alexey Romshin, Dmitrii Pasternak, Kirill Boldyrev, Vladimir Krivobok, Sergey Savin, Pavel Pivovarov, Milos Nesladek, Victor Ralchenko
Summary: In this study, Ge-doped polycrystalline diamond (PCD) and single-crystal diamond (SCD) materials were synthesized using microwave plasma chemical vapor deposition (MPCVD). The structure and luminescence characteristics of these materials were analyzed. The absorption of Ge-V centers in both PCD and SCD materials at low temperatures was demonstrated for the first time. The narrowing of the Ge-V photoluminescence line for the SCD sample compared to the PCD sample was observed, while the intensity of the Ge-V signal was higher in the PCD sample. Single Ge-V centers formed during chemical vapor deposition (CVD) were also demonstrated. These results provide a foundation for the manufacture and design of various photonic devices based on Ge-V color centers.
DIAMOND AND RELATED MATERIALS
(2023)
Review
Physics, Multidisciplinary
S. Lagomarsino, A. M. Flatae, H. Kambalathmana, F. Sledz, L. Hunold, N. Soltani, P. Reuschel, S. Sciortino, N. Gelli, M. Massi, C. Czelusniak, L. Giuntini, M. Agio
Summary: Silicon-vacancy (SiV) centers in diamond are being increasingly studied for their potential applications in quantum communication and sensing. Different fabrication methods can influence the optical properties of SiV centers, while polycrystalline micro and nanostructures are of interest for nano-optics applications.
FRONTIERS IN PHYSICS
(2021)
Article
Quantum Science & Technology
Milad Nonahal, Simon J. U. White, Blake Regan, Chi Li, Aleksandra Trycz, Sejeong Kim, Igor Aharonovich, Mehran Kianinia
Summary: Bottom-up approaches are promising for generating single-crystal diamond structures with color centers. By controlling growth conditions, single-crystal structures can be grown from polycrystalline substrates, and introducing germanium impurities leads to enhanced emission in pyramid shaped diamonds. The method is a significant step towards integrated diamond photonics with 3D structures.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Optics
Melissa A. Guidry, Daniil M. Lukin, Ki Youl Yang, Rahul Trivedi, Jelena Vuckovic
Summary: This study utilizes second-order photon correlations to investigate the quantum processes of soliton microcombs in an integrated silicon carbide microresonator, showing that a stable temporal lattice of solitons can achieve all-to-all entanglement.
Article
Optics
C. Shirpurkar, J. Zang, K. Y. Yang, D. Carlson, S. P. Yu, E. Lucas, S. Pericherla, J. Yang, M. Guidry, D. Lukin, G. H. Ahn, J. Lu, L. Trask, F. Aflatouni, J. Vuckovic, S. B. Papp, P. J. Delfyett
Summary: The experimental demonstration presents a 400 Gbit/s optical communication link utilizing wavelength-division multiplexing and mode-division multiplexing, with a novel 400 GHz frequency comb source and 4x4 mode-division multiplexer structures for increased data capacity.
Article
Nanoscience & Nanotechnology
Alexander D. White, Logan Su, Daniel I. Shahar, Ki Youl Yang, Geun Ho Ahn, Jinhie L. Skarda, Siddharth Ramachandran, Jelena Vuckovic
Summary: Vortex beams are stable solutions of Maxwell's equations that have phase singularities and orbital angular momentum. They have unique properties and find applications in various fields. This study presents a general framework for generating integrated vortex beam emitters using photonic inverse design. Experimental demonstrations and the design of a vortex beam multiplexer are shown. The foundry-fabricated beam emitters with wide bandwidths and high efficiencies are also described.
Article
Optics
Alexander D. White, Geun Ho Ahn, Kasper Van Gasse, Ki Youl Yang, Lin Chang, John E. Bowers, Jelena Vuckovic
Summary: This article demonstrates an integrated approach for passively isolating a continuous-wave laser using the non-reciprocal Kerr nonlinearity in ring resonators. By using silicon nitride as the model platform, the authors achieve single ring isolation of 17-23 dB with 1.8-5.5 dB insertion loss, and cascaded ring isolation of 35 dB with 5 dB insertion loss. They also demonstrate hybrid integration and isolation with a semiconductor laser chip using these devices.
Article
Physics, Multidisciplinary
Daniil M. Lukin, Melissa A. Guidry, Joshua Yang, Misagh Ghezellou, Sattwik Deb Mishra, Hiroshi Abe, Takeshi Ohshima, Jawad Ul-Hassan, Jelena Vuckovic
Summary: This study reports on the integration of near-transform-limited silicon vacancy (VSi) defects into microdisk resonators fabricated in a CMOS-compatible 4H-silicon carbide-on-insulator platform. It demonstrates a single-emitter cooperativity of up to 0.8 and optical superradiance from a pair of color centers coupled to the same cavity mode. The effect of multimode interference on the photon scattering dynamics from this multiemitter cavity quantum electrodynamics system is investigated. These results are crucial for the development of quantum networks in silicon carbide and bridge the classical-quantum photonics gap by uniting optically coherent spin defects with wafer-scalable, state-of-the-art photonics.
Article
Optics
Geun Ho Ahn, Alexander D. White, Hyungjin Kim, Naoki Higashitarumizu, Felix M. Mayor, Jason F. Herrmann, Wentao Jiang, Kevin K. S. Multani, Amir H. Safavi-Naeini, Ali Javey, Jelena Vuckovic
Summary: Many attractive photonics platforms lack integrated photodetectors due to material incompatibilities and lack of process scalability. This research shows that tellurium can be evaporated onto photonic chips using a thermal evaporation and deposition technique, resulting in air-stable, high-speed, ultrawide-band photodetectors. These photodetectors demonstrate detection from visible to short-wave infrared, a bandwidth of over 40 GHz, and platform-independent scalable integration with various photonic structures.
Article
Nanoscience & Nanotechnology
Henry Carfagno, Melissa A. . Guidry, Joshua Yang, Lauren McCabe, Joshua M. O. Zide, Jelena Vuckovic, Matthew F. Doty
Summary: Highly efficient photonic couplers for quantum emitters in fiber networks were designed and tested. The inverse-designed structures outperformed traditional grating outcouplers. A novel fabrication method with smaller feature size constraint improved the device transmission efficiency. Employing broadband optimization criteria resulted in a more robust design.
Article
Optics
G. Spektor, D. Carlson, Z. Newman, J. L. Skarda, N. Sapra, L. Su, S. Jammi, A. R. Ferdinand, A. Agrawal, J. Vuckovic, S. B. Papp
Summary: Visible light wavelengths are crucial for controlling quantum matter and advancing quantum technologies. The development of visible integrated photonics allows for scalable circuits with complex functionalities, pushing the boundaries of science and technology. Our experimental approach demonstrates the generation and control of free-space radiation within a single Ta2O5 layer, enabling the production of circularly polarized beams at challenging wavelengths and paving the way for atomic-physics-based quantum technologies.
Article
Optics
Melissa A. Guidry, Daniil M. Lukin, Ki Youl Yang, Jelena Vuckovic
Summary: In this work, we theoretically study the collective dynamics of the quantum fluctuations of soliton microcombs, which are self-organized pulses of light sustained in driven Kerr microresonators. We find that a dissipative Kerr soliton crystal is accompanied by pulses of squeezed multimode vacuum and derives its operational stability from the strong detuning of the below-threshold parametric process. We present a photonic architecture that enables independent control of the above-and below-threshold states and achieves a high degree of squeezing (>15 dB) in the output waveguide with realistic losses.
Article
Chemistry, Multidisciplinary
Ryan J. Gelly, Alexander D. White, Giovanni Scuri, Xing Liao, Geun Ho Ahn, Bingchen Deng, Kenji Watanabe, Takashi Taniguchi, Jelena Vuckovic, Hongkun Park
Summary: Efficient nanophotonic devices are crucial in applications such as quantum networking, optical information processing, sensing, and nonlinear optics. However, integrating two-dimensional materials into photonic structures is often limited by size and material quality. This study uses hexagonal boron nitride as a waveguiding layer to improve the optical quality of embedded films. By combining it with photonic inverse design, it provides a complete platform for interfacing with optically active 2D materials and enables various functionalities. This work opens up possibilities for advanced 2D-material nanophotonic structures in classical and quantum nonlinear optics.
Article
Chemistry, Multidisciplinary
Kinfung Ngan, Yuan Zhan, Constantin Dory, Jelena Vuckovic, Shuo Sun
Summary: This study presents a new technique that allows for the deterministic assembly of diamond color centers in a silicon nitride photonic circuit, enabling maximum light-matter interaction strength and paving the way for scalable manufacturing of large-scale quantum photonic circuits.
Article
Optics
Joshua Yang, Melissa A. Guidry, Daniil M. Lukin, Kiyoul Yang, Jelena Vuckovic
Summary: Inverse design has brought revolutionary changes to the field of photonics by automating the development of complex structures with unique functionalities. However, its application in nonlinear photonics has been limited. In this study, we demonstrate quantum and classical nonlinear light generation in silicon carbide nanophotonic inverse-designed Fabry-Perot cavities, showcasing the power of inverse design for nonlinear optics.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Guillermo Angeris, Theo Diamandis, Jelena Vuckovic, Stephen P. Boyd
Summary: In this paper, a method for computing bounds for various efficiency metrics in photonics is presented, with a focus on the case where the objective function can be expressed as the ratio of two quadratic functions of the field. A simple semidefinite programming relaxation for this problem is demonstrated. A numerical example of bounding the maximal mode conversion purity for a given device size is provided. The paper is accompanied by an open source Julia package for basic simulations and bounds.
Article
Chemistry, Multidisciplinary
Amani A. Hariri, Alyssa P. Cartwright, Constantin Dory, Yasser Gidi, Steven Yee, Ian A. P. Thompson, Kaiyu X. Fu, Kiyoul Yang, Diana Wu, Nicolo Maganzini, Trevor Feagin, Brian E. Young, Behrad Habib Afshar, Michael Eisenstein, Michel J. F. Digonnet, Jelena Vuckovic, H. Tom Soh
Summary: This study presents a design architecture that can convert existing aptamers into reversible aptamer switches, allowing for tuning of their kinetic and thermodynamic properties without prior knowledge of the ligand binding domain. By combining these switches with evanescent-field-based optical detection hardware, the study demonstrates a biosensor system that can continuously measure multiple biomarkers in complex samples with rapid time responses.
ADVANCED MATERIALS
(2023)
Article
Quantum Science & Technology
Rahul Trivedi, Kevin Fischer, Shanhui Fan, Jelena Vuckovic
Summary: This paper presents a formalism for studying the interaction between localized quantum systems and bosonic environments in structured media. By providing the exact relationship between the quantum scattering matrix and the frequency domain solution of the inhomogeneous wave-equation, the spatial distribution of the scattered few-particle wave-packet can be accessed. This formalism paves the way for computationally understanding the impact of structured media on the scattering properties of localized quantum systems without simplifying assumptions on the physics of the structured media.
