Article
Physics, Condensed Matter
Y. B. Band, Y. Japha
Summary: The spin dynamics of diamond nitrogen vacancy (NV) centers in the presence of oscillating and transverse magnetic fields were studied. It was found that by controlling the coupling between the Zeeman levels, the adiabaticity of spin dynamics can be controlled. Moreover, the strength and direction of the transverse magnetic fields can be used to determine the local strain and electric fields.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Jan Fait, Marian Varga, Karel Hruska, Alexander Kromka, Bohuslav Rezek, Lukas Ondic
Summary: Researchers have demonstrated a new and simple two-step method for fabricating diamond PhC slabs with leaky modes overlapping the emission line of the silicon vacancy (SiV) centers. By first fabricating a PhC structure with leaky modes blue shifted from the SiV emission line in nanocrystalline diamond without SiV centers, and then depositing a thin layer of SiV-rich diamond over the PhC slab to adjust the spectral position of the PhC leaky modes to the emission line of the SiV centers, an intensity enhancement of the zero-phonon line of the SiV centers by a factor of nine is achieved. This PhC tuning method has potential applications for other optical centers and photonic structures in various materials.
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
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
Materials Science, Multidisciplinary
Lukas Razinkovas, Marek Maciaszek, Friedemann Reinhard, Marcus W. Doherty, Audrius Alkauskas
Summary: The study conducted ab initio calculations on the photoionization characteristics of the NV center in diamond, revealing the mechanism of spin polarization induced electron state transition. These findings are crucial for interpreting and designing experiments on photoionization of NV centers.
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
Optics
Zong-Da Zhang, Si-Yu Yin, Li-Cheng Wang, Ying-De Wang, Yun-Fei Li, Zhen-Nan Tian, Qi-Dai Chen
Summary: An array of single NV centers was prepared using the femtosecond laser direct writing method to address the accuracy and consistency issues in static magnetic field detection. The prepared NV centers have fewer defects and good stress uniformity, with an average spatial positioning error of only 0.2 μm. This array enables high accuracy measurement of magnetic field vector and gradient.
Article
Chemistry, Multidisciplinary
Changhao Li, Rouhollah Soleyman, Mohammad Kohandel, Paola Cappellaro
Summary: A molecular transducer based on NV centers has been proposed to convert SARS-CoV-2 RNA into magnetic noise signal for optical readout. This sensor demonstrates high sensitivity, low false negative rate, and fast detection of the virus.
Article
Chemistry, Multidisciplinary
Frantisek Trojanek, Karol Hamracek, Martin Hanak, Marian Varga, Alexander Kromka, Oleg Babcenko, Lukas Ondic, Petr Maly
Summary: Diamond thin films with a high-density of light-emitting negatively charged silicon vacancy (SiV) centers can be prepared at a relatively low cost, which has potential applications in photonics or sensing. The composition of the films, which consist of diamond grains with SiV centers and sp(2)-carbon phase, can be adjusted by changing the preparation conditions. Surface defects and the sp(2)-related defects in the grains can trap the carriers excited within the SiV centers, leading to a decrease in their internal photoluminescence (PL) quantum efficiency.
Article
Physics, Applied
Kelsey M. Bates, Matthew W. Day, Christopher L. Smallwood, Rachel C. Owen, Tim Schroder, Edward Bielejec, Ronald Ulbricht, Steven T. Cundiff
Summary: An ensemble of silicon vacancy (SiV-) centers in diamond was probed using two-pulse correlation spectroscopy and multidimensional coherent spectroscopy. Two main distinct families of SiV- centers were identified, and local strain tensor was calculated based on measured spectra. Variations in strain tensor were observed at multiple points on the sample surface.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Nattakarn Suntornwipat, Saman Majdi, Markus Gabrysch, Kiran Kumar Kovi, Viktor Djurberg, Ian Friel, Daniel J. Twitchen, Jan Isberg
Summary: Researchers demonstrate electrostatic control of valley currents in ultrapure single-crystalline diamond, proposing a model to interpret experimental data and paving the way for the development of valleytronic devices.
Article
Optics
V. P. Mironov, E. N. Tel'minov, D. E. Genin, E. I. Lipatov, M. A. Shulepov, A. E. Dormidonov, A. D. Savvin, A. P. Yelisseyev, V. G. Vins
Summary: The characteristics of diamond affecting laser generation in the context of NV-diamond laser creation were investigated using optical pumping by the second harmonic of the Nd:YAG laser. Nonlinear intensity increase in the 700-750 nm spectral region and a pronounced peak of superluminescence at approximately 718 nm were observed under high intensity irradiation. Nonlinear pumping radiation absorption and accumulation of NV centers in the excited state were detected with increasing pumping intensity. The calculated position of the photoluminescence band matches experimental data closely, considering the population inversion density of the color centers and diamond's absorption spectrum.
APPLIED PHYSICS B-LASERS AND OPTICS
(2023)
Article
Nanoscience & Nanotechnology
Aedan Gardill, Ishita Kemeny, Yanfei Li, Maryam Zahedian, Matthew C. Cambria, Xiyu Xu, Vincenzo Lordi, Adam Gali, Jeronimo R. . Maze, Jennifer T. Choy, Shimon Kolkowitz
Summary: Super-resolution Airy disk microscopy, a novel technique presented in this study, allows nanoscale microscopy in a standard confocal microscope without specialized optics. The technique, combined with ground state depletion, successfully images and controls NV centers in diamond below the diffraction limit, achieving more than 14-fold improvement in resolution compared to the conventional limit.
Article
Materials Science, Multidisciplinary
Jiaqi Lu, Bing Yang, Biao Yu, Haining Li, Nan Huang, Lusheng Liu, Xin Jiang
Summary: This study introduces a simple two-step method to enhance the photoluminescence efficiency of optically active silicon-vacancy (SiV) centers using silicon-doped diamond nanoneedles. By selectively etching nanocrystalline diamond and sp(2) carbon, the photoluminescence emission of SiV centers in diamond nanoneedles is increased by up to 12.1 times, revealing the significant impact of sp(2) carbon on the optical collection of color centers at the sidewall.
ADVANCED OPTICAL MATERIALS
(2021)
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)
Article
Chemistry, Physical
Jinhie Skarda, Rahul Trivedi, Logan Su, Diego Ahmad-Stein, Hyounghan Kwon, Seunghoon Han, Shanhui Fan, Jelena Vuckovic
Summary: This paper proposes a distribution strategy and GPU-based method for fast and accurate simulation of large-area metasurfaces.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Avik Dutt, Luqi Yuan, Ki Youl Yang, Kai Wang, Siddharth Buddhiraju, Shanhui Fan
Summary: The authors propose a straightforward method to construct sharp boundaries in synthetic dimensions using a modulated ring resonator strongly coupled to an auxiliary ring. Various effects associated with such boundaries are explored, and the demonstration of sharp boundaries expands the capability of exploring topological physics, with applications in classical and quantum information processing in synthetic frequency dimensions.
NATURE COMMUNICATIONS
(2022)
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
Sigurd Flagan, Patrick Maletinsky, Richard J. Warburton, Daniel Riedel
Summary: This research demonstrates precise control of the absolute frequency and frequency difference between two resonator modes in Fabry-Perot microcavities by incorporating a diamond micromembrane with a small thickness gradient. The double-resonance enhancement of nonlinear optical processes is achieved by tuning the mirror separation and diamond thickness, allowing for a wide frequency range for pump laser tuning.
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)
