Article
Multidisciplinary Sciences
Alexander Savvin, Alexander Dormidonov, Evgeniya Smetanina, Vladimir Mitrokhin, Evgeniy Lipatov, Dmitriy Genin, Sergey Potanin, Alexander Yelisseyev, Viktor Vins
Summary: The authors successfully demonstrated lasing in (NV-) centers in diamond, achieving improved laser efficiency by fine-tuning the pump conditions to reduce photoionization. Investigation into lasing conditions and gain saturation was conducted under high-power laser pulse pumping of diamond crystal.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Umberto Celano, Hai Zhong, Florin Ciubotaru, Laurentiu Stoleriu, Alexander Stark, Peter Rickhaus, Felipe Favaro de Oliveira, Mathieu Munsch, Paola Favia, Maxim Korytov, Patricia Van Marcke, Patrick Maletinsky, Christoph Adelmann, Paul van der Heide
Summary: In this study, nonperturbative field distribution mapping in ultra-scaled magnetic nanowires with diameters down to 6 nm was achieved using scanning nitrogen-vacancy magnetometry, enabling localized, minimally invasive magnetic imaging with sensitivity down to 3 μT Hz(-1/2). The imaging revealed the presence of weak magnetic inhomogeneities inside in-plane magnetized nanowires, largely undetectable with standard metrology. The strong magnetic field confinement in the nanowires allowed for the study of the interaction between the stray magnetic field and the nitrogen-vacancy sensor, clarifying the formation mechanisms for technologically relevant magnetic nanostructures.
Article
Materials Science, Multidisciplinary
Maxime Rollo, Aurore Finco, Rana Tanos, Florentin Fabre, Thibaut Devolder, Isabelle Robert-Philip, Vincent Jacques
Summary: The study investigates the acceleration of longitudinal spin relaxation in NV defects in the presence of magnetic noise with a spectral component at its electron spin resonance frequency. By applying calibrated and tunable magnetic noise on a single NV defect, it is demonstrated that an increase in the longitudinal spin relaxation rate leads to a reduction in the emitted photoluminescence signal under continuous optical illumination. This photoluminescence quenching mechanism presents a simple all-optical method for detecting magnetic noise sources at the nanoscale.
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
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
Optics
Yulei Chen, Tongtong Li, Dawei Wang, Bin Lu, Guoqiang Chai, Jin Tian
Summary: This paper reports a multi-channel laser beam antenna for NV magnetometers, which provides a uniform magnetic field and efficient fluorescence excitation. By optimizing the antenna size and laser incidence angle, the path length of the excitation beam is increased by three orders of magnitude, significantly improving the sensitivity.
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
Zhonghao Li, Yanling Liang, Chong Shen, Zhenrong Shi, Huanfei Wen, Hao Guo, Zongmin Ma, Jun Tang, Jun Liu
Summary: In this study, wide-field tomography imaging of double circuits was performed using nitrogen-vacancy (NV) center ensembles in a diamond. By employing an inversion model and vector magnetic superposition, the magnetic-field distribution on the surface of the lower layer circuit was obtained. The results provide a simple and highly accurate reference for the detection and fault diagnosis of multilayer and integrated circuits.
Article
Physics, Applied
Si Gao, Si-Yu Yin, Zhao-Xin Liu, Zong-Da Zhang, Zhen-Nan Tian, Qi-Dai Chen, Nian-Ke Chen, Hong-Bo Sun
Summary: This study successfully prepared single NV color centers in diamonds with narrow optical linewidths and long coherence time using the femtosecond laser direct writing technique, which showed narrower linewidths compared to NV color centers prepared using ion implantation method. The density functional theory was used to explain the difference.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Adam Filipkowski, Mariusz Mrozek, Grzegorz Stepniewski, Jakub Kierdaszuk, Aneta Drabinska, Tanvi Karpate, Maciej Glowacki, Mateusz Ficek, Wojciech Gawlik, Ryszard Buczynki, Adam Wojciechowski, Robert Bogdanowicz, Mariusz Klimczak
Summary: This research proposes a novel method for integrating diamond particles containing nitrogen-vacancy centers directly into the fiber core, and verifies its magnetic sensing performance. By manually controlling the distribution of diamond particles in the fiber core, precise control over nanoscale features is achieved. The experimental results show that this integration method can achieve uniform distribution of diamond particles in the fiber without significant agglomeration. Furthermore, the fiber demonstrates good magnetic sensing capabilities in the presence of a magnetic field, with a large dynamic range.
Article
Biochemistry & Molecular Biology
Kaiqi Wu, Thea A. Vedelaar, Viraj G. Damle, Aryan Morita, Julie Mougnaud, Claudia Reyes San Martin, Yue Zhang, Denise P. van der Pol, Heidi Ende-Metselaar, Izabela Rodenhuis-Zybert, Romana Schirhagl
Summary: This study demonstrates the utility of diamond magnetometry in studying the free radical response during Semliki Forest virus infection. The alterations in free radical concentration near infectious viruses were measured using the spin-lattice relaxation of NV defect ensembles in intracellular nanodiamonds. The study provides insights into the real-time free radical variation during the early infectious process.
Article
Physics, Applied
Guillaume Villaret, Ludovic Mayer, Martin Schmidt, Simone Magaletti, Mary De Feudis, Matthew Markham, Andrew Edmonds, Jean-Francois Roch, Thierry Debuisschert
Summary: In this study, we realize the spin readout of nitrogen-vacancy (NV) centers in diamond through photoconductive detection using graphitic planar electrodes. The resistance and current-voltage characteristics of the NV-doped diamond junction are investigated by tuning the 532 nm pump beam intensity. We perform the photoconductive detection of the NV centers ensemble in the continuous-wave regime of the magnetic resonance for a magnetic field above 100 mT, enabling the integration of graphitic microstructures for electrical readout in all-carbon diamond quantum sensors.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Hiroshige Deguchi, Tsukasa Hayashi, Hiroya Saito, Yoshiki Nishibayashi, Minori Teramoto, Masanori Fujiwara, Hiroki Morishita, Norikazu Mizuochi, Natsuo Tatsumi
Summary: We have developed a compact and portable measuring instrument using diamond NV centers, which can be powered by a laptop computer's USB 3.0. The portability is achieved by low power consumption of the optics, thanks to the diamond corner cube that enhances the current of the photodiode by 2.1 times compared to planar diamond, and the microwave source that reduced power consumption by 20 dB using a microwave resonator with a λ/4 open stub to magnetically drive the NV center. These results contribute to the social implementation of diamond sensors.
APPLIED PHYSICS EXPRESS
(2023)
Article
Physics, Applied
Johannes Engel, Kaushalya Jhuria, Debanjan Polley, Tobias Luehmann, Manuel Kuhrke, Wei Liu, Jeffrey Bokor, Thomas Schenkel, Ralf Wunderlich
Summary: A common technique for creating color centers in wideband gap semiconductors is ion implantation followed by thermal annealing. Typically, this annealing process takes place in a vacuum oven. In this study, we utilized annealing based on femtosecond laser pulses. By implanting fluorine ions at 54 keV and chlorine ions at 74 keV into diamond, and performing micrometer precise annealing using focused femtosecond laser pulses (800 nm +/- (30) nm) with varying pulse numbers and repetition rates, we successfully created shallow spots with color centers of different brightness.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Lucas K. Nolasco, Flavio P. Almeida, Gustavo F. B. Almeida, Juliana M. P. Almeida, Valmor R. Mastelaro, Kelly T. Paula, Cleber R. Mendonca
Summary: This paper focuses on studying the incubation process and the threshold fluence dependence on the fs-laser microstructuring of DLC films. Raman spectroscopy analysis indicates a decrease in sp(3) fraction and a more ordered phase after fs-laser processing of DLC samples.
Article
Physics, Applied
A. N. Giakoumaki, G. Coccia, V. Bharadwaj, J. P. Hadden, A. J. Bennett, B. Sotillo, R. Yoshizaki, P. Olivero, O. Jedrkiewicz, R. Ramponi, S. M. Pietralunga, M. Bollani, A. Bifone, P. E. Barclay, A. Kubanek, S. M. Eaton
Summary: Integrated photonic circuits with the ability to confine and manipulate light show promise for applications in quantum information and sensing technologies. The negatively charged nitrogen vacancy (NV-) diamond color center is a leading candidate as a spin-active quantum emitter, with the capability of optically reading its ground spin state and long coherence times at room temperature. The use of femtosecond laser writing allows for the fabrication of optical waveguides and NV complexes. This Perspective reviews the physical mechanisms of laser fabrication in diamond, analyzes the properties of waveguides, single- and ensemble-NV centers, and discusses the potential for their integration into photonic devices for quantum information and sensing.
APPLIED PHYSICS LETTERS
(2022)
Article
Environmental Sciences
Ryan N. Lehman, Gregg R. Poulakis, Rachel M. Scharer, Jill M. Hendon, Alia G. Court, Andrew K. Wooley, Ariel M. Williams, Matthew J. Ajemian, John P. Hadden, Jeff L. Beal, Michael P. McCallister, Nicole M. Phillips
Summary: This study used environmental DNA (eDNA) surveys to confirm the reappearance of critically endangered smalltooth sawfish in two historically occupied estuaries in US waters, providing additional evidence for the recovery of this species.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2022)
Article
Physics, Applied
S. G. Bishop, J. P. Hadden, R. Hekmati, J. K. Cannon, W. W. Langbein, A. J. Bennett
Summary: This paper reports on a bright color center in a semi-polar gallium nitride substrate emitting quantum light at room temperature in the near-infrared. By using a hemispherical solid immersion lens with an index close to the semiconductor, the photon collection efficiency can be improved by a factor of 4.3 +/- 0.1, while also enhancing the lateral resolution.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Blaine McLaughlin, David P. Lake, Matthew Mitchell, Paul E. Barclay
Summary: We demonstrate the simultaneous generation of second and third harmonic signals from a telecom wavelength pump in a gallium phosphide (GaP) microdisk. Using power scaling analysis and calculations of nonlinear cavity mode coupling factors, we investigate the contributions of direct and cascaded sum frequency generation processes to the third harmonic signal. We find that despite the high material absorption in GaP at the third harmonic wavelength, both of these processes can be significant and their relative magnitudes depend closely on the detuning between the second harmonic wavelengths of the cavity modes.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Physics, Applied
J. P. Hadden, Cobi Maynard, Daryl M. Beggs, Robert A. Taylor, Anthony J. Bennett
Summary: This study presents simulations of elements designed to couple light into, and out of, triangular waveguides. The devices demonstrate coupling efficiencies approaching 50%, which will enable fast and efficient testing of closely spaced integrated circuit components.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Prasoon K. K. Shandilya, Sigurd Flagan, Natalia C. C. Carvalho, Elham Zohari, Vinaya K. K. Kavatamane, Joseph E. E. Losby, Paul E. E. Barclay
Summary: Integrated photonic devices in diamond show great potential in quantum applications such as quantum communication, quantum information processing, and quantum sensing. Diamond's exceptional thermal, optical, and mechanical properties make it an ideal host for optical active spin qubits, which are crucial for quantum technologies. Recent advances in diamond nanofabrication techniques have opened up new possibilities for scaling up these experiments towards practical quantum technologies.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Alberto Taffelli, Giovanni Ligorio, Lucio Pancheri, Alberto Quaranta, Riccardo Ceccato, Andrea Chiappini, Marco Vittorio Nardi, Emil J. W. List-Kratochvil, Sandra Dire
Summary: This study optimizes a sol-gel synthesis method for the fabrication of MoS2 films, enabling the deposition of large area MoS2 films on different substrates. The films exhibit desired chemical and physical properties expected for 2D-MoS2 and show uniformity across the entire film area. Photodetector devices made using this fabrication method demonstrate responsivity values of few mA/W in the NUV-VIS-NIR spectrum, expanding the spectral response range of MoS2-based photodetectors previously reported. Despite the influence of residual electronic defects on the device response time and light-to-dark current ratio, this work presents a scalable and versatile process for fabricating 2D-MoS2 and photodetectors based on it.
Article
Optics
Hamidreza Kaviani, Bishnupada Behera, Ghazal Hajisalem, Gustavo de Oliveira Luiz, David P. Lake, Paul E. Barclay
Summary: Using light to measure an object's motion is crucial in mechanical sensing. Incorporating mechanical resonators inside optical resonators can enhance the sensitivity of optomechanical measurements. In this study, we have successfully measured the high-frequency twisting motion of a nanodisk by converting it to vibrations of a photonic crystal cavity. The nanodisk's torsional resonances were measured with a sensitivity ranging from 5.1 x 10(-21) to 1.2 x 10(-19) Nm/root Hz for a mechanical frequency range of 5-800 MHz using optomechanical readout. Additionally, the system allows for the installation of magnetic nanostructures or metasurfaces without affecting the cavity's optical properties, making it suitable for torque magnetometry and structured light sensing.
Article
Physics, Applied
J. K. Cannon, S. G. Bishop, J. P. Hadden, H. B. Yagci, A. J. Bennett
Summary: Color centers in wide-bandgap semiconductors, such as aluminum nitride, are a promising class of solid-state quantum light sources. We present a technique to rapidly map and identify a family of color centers in aluminum nitride that emit light at around 620 nm. Unlike many other emitters in crystalline materials, these color centers exhibit a uniform distribution in their absorption polarization orientation in the c-plane.
APPLIED PHYSICS LETTERS
(2023)
Review
Chemistry, Physical
Giancarlo C. C. Righini, Cristina Armellini, Maurizio Ferrari, Alice Carlotto, Alessandro Carpentiero, Andrea Chiappini, Alessandro Chiasera, Anna Lukowiak, Thi Ngoc Lam Tran, Stefano Varas
Summary: In this review, the development of sol-gel glasses for photonics applications is overviewed, with a focus on the interesting results obtained by the authors and their collaborators. Silicate glasses with specific optical and spectroscopic properties are discussed, including their roles in luminescent systems, light-confining structures, and memristors. The effects of rare-earth doping, matrix composition, densification process, and fabrication protocol on the photonic systems are illustrated using appropriate examples. The achievements in fabricating sol-gel optical waveguides, microstructures, and nanostructures for light confinement are also briefly mentioned.
Article
Multidisciplinary Sciences
Reza Hekmati, John P. Hadden, Annie Mathew, Samuel G. Bishop, Stephen A. Lynch, Anthony J. Bennett
Summary: This research designs circular bullseye cavities suitable for enhancing the emission from various materials and achieves efficient coupling and collection using both periodic and apodised designs. This study is of great significance for coupling light from a point source to a propagating mode in nano-photonics and quantum optics.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Analytical
Paloma Almodovar, Belen Sotillo, David Giraldo, Joaquin Chacon, Inmaculada Alvarez-Serrano, Maria Luisa Lopez
Summary: This study presents a cost-effective method for producing high-performance cathodes for aluminum-air batteries. The electrochemical activity is enhanced by modifying commercial fuel cell cathodes through electrodeposition of nickel and manganese species. By combining the favorable properties of electrodeposited manganese species with nickel species, a high-performance cathode is obtained. The simplicity and cost-effectiveness of the electrodeposition method make it a viable option for large-scale production of high-performance cathodes for next-generation energy storage devices.
Article
Chemistry, Applied
Lorena Alcaraz, Belen Sotillo, Carlos Iglesias, Felix A. Lopez, Paloma Fernandez, Claudia Belviso, Ana Urbieta
Summary: This study focused on the use of a synthetic LTA zeolite functionalized with nanomagnetite for the absorption of Dysprosium (Dy). The results showed that the zeolite had a high adsorption capacity for Dy and followed Langmuir and Temkin models as well as pseudo-second-order kinetics. Thermodynamic analysis indicated that the adsorption of Dy onto the zeolite was a spontaneous and favorable process. These findings provide valuable insights for the design and optimization of zeolite-based processes for the recovery and recycling of rare earth elements, contributing to the development of a more sustainable and circular economy.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
