Review
Physics, Applied
Natalia Kryzhanovskaya, Alexey Zhukov, Eduard Moiseev, Mikhail Maximov
Summary: This review presents the recent advances in III-V microdisk/microring lasers, discussing the basic physics of photonic WGM resonators, laser cavity design, and the advantages and disadvantages of different laser active region types. Furthermore, it addresses key issues such as non-directional emission, high-speed direct modulation, and energy consumption characteristics of WGM microlasers under direct modulation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
B. Giroire, A. Garcia, S. Marre, T. Cardinal, C. Aymonier
Summary: A chemistry platform for the continuous synthesis of high-quality III-nitride quantum dots using supercritical solvents and short residence times was demonstrated. The GaN quantum dots produced exhibited strong UV photoluminescence and showed a continuous bandgap shift towards lower energies with increasing indium content. Additionally, an example of metal site substitution in the synthesis of InxGa1-xN solid solution was provided.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Soyoung Park, Satoshi Hiura, Junichi Takayama, Kazuhisa Sueoka, Akihiro Murayama
Summary: This research demonstrates the ability to control optical polarization by voltage at room temperature, with a significant change in relative spin polarization. By precise control of the spin-flip scattering rate within quantum dots, ultrafast spin-modulated optical signals can be achieved.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Physics, Multidisciplinary
Wei Zhang, Shuang Han, Xin-Jun Ma, Xianglian, Yong Sun, Jing-Lin Xiao
Summary: This study investigates the ground state energy of weak coupling polarons confined in III-V compound semiconductor quantum dots. The results demonstrate that the ground state energy splits into two branches due to the Rashba spin-orbit coupling effect. The spin splitting spacing is influenced by the strength of the Rashba spin-orbit coupling and the coupling strength and effective mass of the III-V compound semiconductor material.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Chemistry, Physical
A. K. Tan, N. A. Hamzah, M. A. Ahmad, S. S. Ng, Z. Hassan
Summary: In this study, InGaN/GaN heterostructures were grown on a flat sapphire substrate using MOCVD technique. Results showed that a higher V/III ratio led to parasitic behavior by hydrogen dissociated from ammonia, which etched the InN and changed the growth morphology. Moreover, the InGaN thin films grown at higher V/III ratios exhibited more stable bandgap energy and improved electrical properties. The correlation between strain and carrier density was also discussed, and it was concluded that high-quality and thick InGaN thin films could be grown for solar cell applications at higher V/III ratio conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Applied
Adrien Khalili, Claire Abadie, Tung Huu Dang, Audrey Chu, Eva Izquierdo, Corentin Dabard, Charlie Greboval, Mariarosa Cavallo, Huichen Zhang, Stefano Pierini, Yoann Prado, Xiang Zhen Xu, Sandrine Ithurria, Gregory Vincent, Christophe Coinon, Ludovic Desplanque, Emmanuel Lhuillier
Summary: This study proposes a method to broaden the spectral range of InGaAs by using HgTe nanocrystals and alleviating lattice matching constraints in short wave infrared sensing. A diode structure is designed, where a p-type HgTe NC array and n-type InGaAs wires are used to extract minority carriers. This work opens up new possibilities for infrared detection using epitaxially grown and colloidally grown semiconductors.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Jari Leemans, Vladimir Pejovic, Epimitheas Georgitzikis, Matthias Minjauw, Abu Bakar Siddik, Yu-Hao Deng, Yinghuan Kuang, Gunther Roelkens, Christophe Detavernier, Itai Lieberman, Pawel E. Malinowski, David Cheyns, Zeger Hens
Summary: QD photodiodes made from non-restricted In(As,P) QDs demonstrate sensitivity for SWIR light up to 1400 nm, making them promising for applications in QD image sensors.
Article
Physics, Applied
Jianzhuo Liu, Mingchu Tang, Huiwen Deng, Samuel Shutts, Lingfang Wang, Peter M. Smowton, Chaoyuan Jin, Siming Chen, Alywn Seeds, Huiyun Liu
Summary: InAs/GaAs quantum-dot (QD) lasers offer a promising method for Si-based on-chip light sources. However, the integration of III-V materials on Si introduces a high density of threading dislocations (TDs), which limits the lifetime of the laser device. In this study, a kinetic model was proposed to simulate the degradation process caused by TDs in the early stage of laser operation. By using a rate equation model, the current density in the wetting layer, where the TDs concentrate, was calculated. The rate of degradation of QD lasers with different cavity lengths and quantum-well lasers directly grown on Si substrates was compared by varying the fitting parameters in the calculation of current densities in the kinetic model.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Bin Sun, Amin Morteza Najarian, Laxmi Kishore Sagar, Margherita Biondi, Min-Jae Choi, Xiyan Li, Larissa Levina, Se-Woong Baek, Chao Zheng, Seungjin Lee, Ahmad R. Kirmani, Randy Sabatini, Jehad Abed, Mengxia Liu, Maral Vafaie, Peicheng Li, Lee J. Richter, Oleksandr Voznyy, Mahshid Chekini, Zheng-Hong Lu, F. Pelayo Garcia de Arquer, Edward H. Sargent
Summary: Colloidal quantum dots (CQDs) have tunable bandgap and solution processing, making them promising materials for infrared (IR) light detection. However, the time response of CQD IR photodiodes is currently inferior to that of Si and InGaAs. The high permittivity of II-VI CQDs leads to slow charge extraction, while III-Vs offer low permittivity and potential for high-speed operation. By managing the surface using amphoteric ligand coordination, the performance of InAs CQD solids is improved, achieving fast response time and high external quantum efficiency.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
J. Dimuna, T. Boyett, I. Miotkowski, A. K. Ramdas, T. M. Pekarek, J. T. Haraldsen
Summary: By using computational and experimental techniques, the effects of titanium doping on the +2 oxidation of CdSe crystal are examined. The presence of a robust spin-1 magnetic state of Ti is confirmed through stoichiometry and magnetization measurements. Density functional theory is used to investigate the electronic and magnetic states, and it is found that the Ti-d impurity band transitions from a metallic state to a semiconducting state as the Hubbard U parameter changes, resulting in the formation of the +2 state for the Ti ion.
Article
Physics, Multidisciplinary
Rohit Ramesh Nimje, Ashutosh Mahajan
Summary: The lifetime of electrons in a quantum well formed by III-V semiconductors has been obtained analytically by finding the poles of the scattering matrix in a small-width approximation. Airy functions, which are solutions of the Schrodinger equation for triangular potentials, are expanded for large and small arguments. The decay width is determined by solving the scattering problem for the triangular potential well using mixed boundary conditions, and is found to be in agreement with experimental measurements and numerical calculations.
Article
Multidisciplinary Sciences
J. Yoneda, W. Huang, M. Feng, C. H. Yang, K. W. Chan, T. Tanttu, W. Gilbert, R. C. C. Leon, F. E. Hudson, K. M. Itoh, A. Morello, S. D. Bartlett, A. Laucht, A. Saraiva, A. S. Dzurak
Summary: The article demonstrates high-fidelity coherent transport of an electron spin qubit between quantum dots in isotopically-enriched silicon, with a reported polarization transfer fidelity of 99.97% and an average coherent transfer fidelity of 99.4%. The results suggest that this method can reduce the cost of fault-tolerant quantum processors and provide key elements for high-fidelity, on-chip quantum information distribution.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Reyhaneh Toufanian, Margaret Chern, Victoria H. Kong, Allison M. Dennis
Summary: The study investigates the impact of core composition, shell composition, and shell thickness on the optical properties of semiconductor nanocrystal quantum dots, revealing the ability to produce brightness-matched green and red emitters by adjusting the thickness of the ZnSe shell.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Inorganic & Nuclear
Leo Angele, Sebastien Dreyfuss, Benoit Dubertret, Nicolas Mezailles
Summary: The role of indium carboxylate precursors in synthesizing monodisperse InP quantum dots was explored. The presence of carboxylic acid affected the reaction kinetics and optical properties of the InP QDs, leading to less controlled formation of nanocrystals. Luminescent quantum dots with a gradated ZnSeS shell were successfully obtained from the synthesized InP core.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Analytical
Pierre Fehlen, Guillaume Thomas, Fernando Gonzalez-Posada, Julien Guise, Francesco Rusconi, Laurent Cerutti, Thierry Taliercio, Denis Spitzer
Summary: Chemical warfare agents, such as sarin, are highly lethal to humans and require sensitive and selective detection. Infrared absorption spectroscopy is a powerful technique, but the mismatch between infrared light wavelength and molecule absorption cross-section dimensions reduces sensitivity. To address this, a plasmonic sensor using III-V semiconductors InAsSb with nano-antennas and enhanced electric field was proposed. Experiments using a sarin simulant showed that the sensor successfully detected the molecule at low concentrations. This work demonstrates the application of III-V semiconductor plasmonics for gas sensing of complex molecules using surface-enhanced infrared absorption.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Optics
Tintu Kuriakose, Paul M. Walker, Toby Dowling, Oleksandr Kyriienko, Ivan A. Shelykh, Phillipe St-Jean, Nicola Carlon Zambon, Aristide Lemaitre, Isabelle Sagnes, Luc Legratiet, Abdelmounaim Harouri, Sylvain Ravets, Maurice S. Skolnick, Alberto Amo, Jacqueline Bloch, Dmitry N. Krizhanovskii
Summary: Photonic platforms are ideal for quantum technologies due to weak photon-environment coupling and interactions between photons. This study demonstrates that the required nonlinearity can be achieved using exciton-polaritons in micropillars with embedded quantum wells, and observes the effect of cross-phase modulation.
Article
Optics
S. Francesconi, A. Raymond, R. Duhamel, P. Filloux, A. Lemaitre, P. Milman, M. I. Amanti, F. Baboux, S. Ducci
Summary: We demonstrate a chip-integrated semiconductor source that combines polarization and frequency entanglement, allowing the generation of entangled biphoton states in a hybrid degree of freedom without post-manipulation. The device is based on type-II spontaneous parametric downconversion in a counterpropagating phasematching scheme, enabling the direct generation of polarization-frequency entangled photons at room temperature and telecom wavelength. The state entanglement is quantified by a combined measurement of the joint spectrum and Hong-Ou-Mandel interference.
PHOTONICS RESEARCH
(2023)
Correction
Physics, Applied
Benedek Gaal, Martin Arentoft Jacobsen, Luca Vannucci, Julien Claudon, Jean-Michel Gerard, Niels Gregersen
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
B. Lefaucher, J. -b. Jager, V. Calvo, A. Durand, Y. Baron, F. Cache, V. Jacques, I. Robert-Philip, G. Cassabois, T. Herzig, J. Meijer, S. Pezzagna, M. Khoury, M. Abbarchi, A. Dreau, J. -m. Gerard
Summary: We demonstrate the incorporation of G centers in silicon-on-insulator (SOI) microrings through ion implantation and conventional nanofabrication. The coupling between the emitters and the resonant modes of the microrings is investigated using continuous-wave and time-resolved microphotoluminescence experiments. By adjusting the size of the microrings, we achieve resonance between the G centers and the microrings, resulting in enhanced zero-phonon line intensity. However, the average lifetime of the G centers remains unchanged, indicating a low radiative yield. We also discuss the impact of parasitic defects in heavily implanted silicon and the potential for quantum electrodynamics experiments with color centers in lightly implanted SOI rings.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Matteo Finazzer, Rana Tanos, Yoann Cure, Alberto Artioli, Saptarshi Kotal, Joel Bleuse, Yann Genuist, Jean-Michel Gerard, Fabrice Donatini, Julien Claudon
Summary: A photonic wire antenna with individual quantum dots embedded demonstrates promising prospects for quantum photonics and hybrid nanomechanics. By applying static or oscillating bending forces using on-chip electrodes, we achieve control over the bending direction and mechanical stress on the quantum dots, resulting in tunable quantum light sources. Operating in the dynamic regime, we excite the wire's flexural mode and detect mechanical vibration using the quantum dots' emission. The estimated operation bandwidth in the GHz range offers exciting possibilities for QD-nanowire hybrid mechanics exploration.
Article
Optics
N. Coste, D. A. Fioretto, N. Belabas, S. C. Wein, P. Hilaire, R. Frantzeskakis, M. Gundin, B. Goes, N. Somaschi, M. Morassi, A. Lemaitre, I. Sagnes, A. Harouri, S. E. Economou, A. Auffeves, O. Krebs, L. Lanco, P. Senellart
Summary: A three-partite cluster state made of one semiconductor spin and two indistinguishable photons is generated from an InGaAs quantum dot embedded in a pillar microcavity. The three-partite entanglement rate is 0.53 MHz at the output of the device.
Article
Nanoscience & Nanotechnology
Anne Rodriguez, Priya Priya, Edson R. Cardozo R. de Oliveira, Abdelmounaim Harouri, Isabelle Sagnes, Florian Pastier, Luc Le Gratiet, Martina Morassi, Aristide Lemaitre, Loic Lanco, Martin Esmann, Norberto Daniel Lanzillotti-Kimura
Summary: In this study, the polarization of excitation laser and Brillouin signal in bulk crystalline solids is manipulated using polarization-sensitive optical resonances in elliptical micropillars, allowing for measurement of acoustic phonons with frequencies difficult to access with standard Brillouin and Raman spectroscopies. This technique can have applications in various polarization-sensitive optical systems, and in optomechanical, optoelectronic, and quantum optics devices.
Article
Nanoscience & Nanotechnology
Felicien Appas, Othmane Meskine, Aristide Lemaitre, Jose Palomo, Florent Baboux, Maria I. Amanti, Sara Ducci
Summary: The ability to combine advanced functionalities on a single chip is crucial for both classical and quantum photonic technologies. Generating and handling orthogonally polarized photon pairs on a chip is a central challenge for scalable quantum photonics circuits. In this study, a monolithic AlGaAs chip was used to generate broadband orthogonally polarized photon pairs and split their polarizations, achieving a separation rate of 85% over a 60 nm bandwidth. The results demonstrate the validity of this approach and represent a significant step toward miniaturized and easy-to-handle photonic devices for quantum information processing.
Article
Chemistry, Multidisciplinary
E. Rongione, L. Baringthon, D. She, G. Patriarche, R. Lebrun, A. Lemaitre, M. Morassi, N. Reyren, M. Micica, J. Mangeney, J. Tignon, F. Bertran, S. Dhillon, P. Le Fevre, H. Jaffres, J. -m. George
Summary: By combining spin- and angle-resolved photoemission spectroscopy with time-resolved THz emission spectroscopy, it is demonstrated that spin-charge conversion mainly arises from the surface state in ultrathin films of Bi1-xSbx. The robustness of the surface state and the significant conversion efficiency in epitaxial Bi1-xSbx thin films bring new perspectives for ultra-low power magnetic random-access memories and broadband THz generation.
Article
Quantum Science & Technology
N. Coste, M. Gundin, D. A. Fioretto, S. E. Thomas, C. Millet, E. Mehdi, N. Somaschi, M. Morassi, M. Pont, A. Lemaitre, N. Belabas, O. Krebs, L. Lanco, P. Senellart
Summary: Spins in semiconductor quantum dots (QDs) are promising local quantum memories for generating polarization-encoded photonic cluster states. By utilizing acoustic phonon-assisted excitation, the polarization selective optical transitions can be fully exploited to initialize and measure single spin states. Through monitoring the spin Larmor precession during the radiative emission process of an excited state or in the QD ground state, we achieve a spin state detection fidelity of 94.7 +/- 0.2% and a hole spin coherence time of 25 +/- 5 ns, demonstrating the potential of this scheme and system for generating linear cluster states with a dozen of photons.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Physics, Applied
Eva Diaz, Alberto Anadon, Martina Morassi, Michel Hehn, Aristide Lemaitre, Jon Gorchon
Summary: This work focuses on the full characterization of terahertz pulses confined in waveguides. Terahertz photoconductive switch detectors were fabricated and used to sample the electrical pulses. Two calibration methods were developed to accurately characterize the pulse amplitude. These techniques provide a reliable tool to explore nonlinear phenomena at high THz intensities.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
C. Symonds, V. Toanen, A. Gassenq, J. -m. Benoit, A. Pereira, E. Cleyet-Merle, R. Fulcrand, F. Bessueille, S. Minot, M. Morassi, A. Lemaitre, J. Bellessa
Summary: This Letter presents a fabrication process for current injection into micrometer-size Ag/GaAs Tamm emitting diodes with special care to avoid surface damages. Electroluminescence from GaAs quantum wells is demonstrated at room temperature, showing dispersion following the Tamm mode. Additionally, for small diameters Tamm structures, electroluminescence occurs in discretized energy modes due to in-plane confinement. This observation of electrically excited emission from a confined diode is a significant advancement towards Tamm plasmon optical devices with novel functionalities.
APPLIED PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Debanjan Polley, Akshay Pattabi, Ashwin Rastogi, Kaushalya Jhuria, Eva Diaz, Hanuman Singh, Aristide Lemaitre, Michel Hehn, Jon Gorchon, Jeffrey Bokor
Summary: In this study, we experimentally demonstrate ultrafast spin-orbit torque-induced coherent magnetization switching dynamics in a ferromagnet and propose a unique magnetization switching mechanism that can significantly increase the writing speed of magnetic random-access memory devices.
Article
Chemistry, Multidisciplinary
Martin Arentoft Jacobsen, Yujing Wang, Luca Vannucci, Julien Claudon, Jean-Michel Gerard, Niels Gregersen
Summary: In this paper, we provide a detailed analysis of the physics behind the collection efficiency and Purcell enhancement of the nanopost single-photon source. We find that a standard single-mode Fabry-Perot model is insufficient to explain the device performance, as scattering from the fundamental mode to radiation modes plays a significant role. We also discover that the scattering mechanism decouples the collection efficiency from the Purcell enhancement, leading to maximum collection efficiency off-resonance. Lastly, we discuss the potential benefits of this scattering mechanism for future single-photon source designs.
Article
Nanoscience & Nanotechnology
Agostino Di Francescantonio, Attilio Zilli, Davide Rocco, Laure Coudrat, Fabrizio Conti, Paolo Biagioni, Lamberto Duo, Aristide Lemaitre, Costantino De Angelis, Giuseppe Leo, Marco Finazzi, Michele Celebrano
Summary: By utilizing a nonlinear periodic metasurface, we have demonstrated all-optical routing of telecom photons upconverted to the visible range. This was achieved through the interference between two frequency-degenerate upconversion processes, namely third-harmonic and sum-frequency generation, controlled by tuning the relative phase and polarization between the pump beams. This technique allows for the modulation of the upconverted signal among the diffraction orders of the metasurface with high efficiency.
NATURE NANOTECHNOLOGY
(2023)
