Article
Chemistry, Multidisciplinary
Mathias Pont, Anne-Laurence Phaneuf-L'Heureux, Regis Andre, Sebastien Francoeur
Summary: Motional narrowing is a phenomenon where a quantum state can be entangled with a noisy environment and retain coherence. Accelerating spectral diffusion into the THz regime can approach the optimal coherence limit set by the radiative rate.
Article
Chemistry, Multidisciplinary
Logan P. Keating, Hyunho Lee, Steven P. Rogers, Conan Huang, Moonsub Shim
Summary: By using transient electroluminescence and time-resolved photoluminescence measurements, the effects of offset voltage on charging and charge transport were examined, revealing different charging processes and mechanisms.
Article
Chemistry, Multidisciplinary
Yuanqing Xu, Weibiao Wang, Zhexue Chen, Xinyu Sui, Aocheng Wang, Cheng Liang, Jinquan Chang, Yanhong Ma, Luting Song, Wenyu Jiang, Jin Zhou, Xinfeng Liu, Yong Zhang
Summary: A general strategy has been developed to mechanically tailor semiconductor bulk materials into quantum dots, resulting in high yields of various semiconductor QDs. The produced QDs exhibit outstanding water solubility and remarkable photoluminescence, showing potential for practical applications in solid-state fluorescence and nonlinear saturation absorption.
Article
Chemistry, Multidisciplinary
Athanasios Smponias, Dionisis Stefanatos, Emmanuel Paspalakis
Summary: In this study, a hybrid nanostructure composed of a semiconductor quantum dot coupled to a metallic nanoparticle was investigated for the efficient creation of biexciton state using linearly polarized laser pulses. Numerical simulations showed that a simple on-off-on pulse-sequence can efficiently prepare the biexciton state even in the presence of the nanoparticle, for various interparticle distances and biexciton energy shifts. The pulse durations in the sequence were determined by solving a transcendental equation.
Article
Quantum Science & Technology
Manish Kumar Mehta, Joseph Thomas Andrews, Pratima Sen
Summary: In this paper, a novel method is proposed to overcome the limitations of exciton and biexciton states only appearing at low temperatures, as well as the complexity of using lasers with different polarization states for CNOT operations. By utilizing ultrafast magnetic pulse CNOT gate operation in Mn-doped InSb quantum dots at room temperature, with only a circularly polarized laser pulse, the proposed method shows a significantly large fidelity calculation for CNOT gate.
QUANTUM INFORMATION PROCESSING
(2021)
Article
Chemistry, Multidisciplinary
Thomas Lettner, Samuel Gyger, Katharina D. Zeuner, Lucas Schweickert, Stephan Steinhauer, Carl Reuterskiold Hedlund, Sandra Stroj, Armando Rastelli, Mattias Hammar, Rinaldo Trotta, Klaus D. Joens, Val Zwiller
Summary: By utilizing micromachined piezoelectric actuators, fine-structure suppression in InAs quantum dots has been achieved, leading to the generation of highly entangled photons at 1550 nm with high fidelity. The concurrence remains relatively high even with moderate (weak) temporal filtering, showing the potential for utilizing entangled photons from quantum dots in fiber-based quantum communication protocols.
Article
Quantum Science & Technology
Si-Si Gu, Bao-Chuan Wang, Ming-Bo Chen, Ting Lin, Yuan Kang, Hai-Ou Li, Gang Cao, Guo-Ping Guo
Summary: The integration of quantum dots with a microwave resonator in the hybrid circuit quantum electrodynamics architecture has created a controllable artificial system and enriched physics through electron-photon interaction. The study investigates a hybrid device where a triple quantum dot is dipole coupled with the electric field of a superconducting quantum interference device array resonator. The results suggest that the hybrid system has the potential to investigate exotic many-body effects and matter-light interaction, depending on the relationship between various Coulomb energy in the quantum dot and the cavity photon energy.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Jingwei Mu, Shaoyun Huang, Zhi-Hai Liu, Weijie Li, Ji-Yin Wang, Dong Pan, Guang-Yao Huang, Yuanjie Chen, Jianhua Zhao, H. Q. Xu
Summary: The research team successfully demonstrated a highly tunable linear quadruple QD system in a nanowire and obtained characteristic two-dimensional charge stability diagrams through electron transport measurements, providing important experimental evidence for studying multiple QD systems.
Article
Nanoscience & Nanotechnology
Heidi Potts, Markus Aspegren, Rousan Debbarma, Sebastian Lehmann, Claes Thelander
Summary: We investigate tunnel transport spectroscopy on a quantum dot molecule with a superconducting contact. The scattering between quantum dot spins and Bogoliubov quasiparticles leads to the formation of Yu-Shiba-Rusinov states within the superconducting gap. We find that the interaction between inter-dot spin-triplet state and the superconductor is stronger than the corresponding singlet, indicating stronger screening.
Article
Optics
Emad Alkhazraji, Weng W. Chow, Frederic Grillot, John E. Bowers, Yating Wan
Summary: This work investigates the physics underlying spectral narrowing of self-injection-locked on-chip lasers to Hz-level lasing linewidth using a composite-cavity structure. Heterogeneously integrated III-V/SiN lasers with quantum-dot and quantum-well active regions are analyzed, and the effects of carrier quantum confinement are studied. Parametric studies reveal tradeoffs involved with tailoring the linewidth, output power, and injection current for different device configurations. These findings can guide more detailed parametric studies for engineering design.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Chris Whittle, Evan D. Hall, Sheila Dwyer, Nergis Mavalvala, Vivishek Sudhir, R. Abbott, A. Ananyeva, C. Austin, L. Barsotti, J. Betzwieser, C. D. Blair, A. F. Brooks, D. D. Brown, A. Buikema, C. Cahillane, J. C. Driggers, A. Effler, A. Fernandez-Galiana, P. Fritschel, V. V. Frolov, T. Hardwick, M. Kasprzack, K. Kawabe, N. Kijbunchoo, J. S. Kissel, G. L. Mansell, F. Matichard, L. McCuller, T. McRae, A. Mullavey, A. Pele, R. M. S. Schofield, D. Sigg, M. Tse, G. Vajente, D. C. Vander-Hyde, Hang Yu, Haocun Yu, C. Adams, R. X. Adhikari, S. Appert, K. Arai, J. S. Areeda, Y. Asali, S. M. Aston, A. M. Baer, M. Ball, S. W. Ballmer, S. Banagiri, D. Barker, J. Bartlett, B. K. Berger, D. Bhattacharjee, G. Billingsley, S. Biscans, R. M. Blair, N. Bode, P. Booker, R. Bork, A. Bramley, K. C. Cannon, X. Chen, A. A. Ciobanu, F. Clara, C. M. Compton, S. J. Cooper, K. R. Corley, S. T. Countryman, P. B. Covas, D. C. Coyne, L. E. H. Datrier, D. Davis, C. Di Fronzo, K. L. Dooley, P. Dupej, T. Etzel, M. Evans, T. M. Evans, J. Feicht, P. Fulda, M. Fyffe, J. A. Giaime, K. D. Giardina, P. Godwin, E. Goetz, S. Gras, C. Gray, R. Gray, A. C. Green, E. K. Gustafson, R. Gustafson, J. Hanks, J. Hanson, R. K. Hasskew, M. C. Heintze, A. F. Helmling-Cornell, N. A. Holland, J. D. Jones, S. Kandhasamy, S. Karki, P. J. King, Rahul Kumar, M. Landry, B. B. Lane, B. Lantz, M. Laxen, Y. K. Lecoeuche, J. Leviton, J. Liu, M. Lormand, A. P. Lundgren, R. Macas, M. MacInnis, D. M. Macleod, S. Marka, Z. Marka, D. Martynov, K. Mason, T. J. Massinger, R. McCarthy, D. E. McClelland, S. McCormick, J. McIver, G. Mendell, K. Merfeld, E. L. Merilh, F. Meylahn, T. Mistry, R. Mittleman, G. Moreno, C. M. Mow-Lowry, S. Mozzon, T. J. N. Nelson, P. Nguyen, L. K. Nuttall, J. Oberling, Richard J. Oram, C. Osthelder, D. J. Ottaway, H. Overmier, J. R. Palamos, W. Parker, E. Payne, R. Penhorwood, C. J. Perez, M. Pirello, H. Radkins, K. E. Ramirez, J. W. Richardson, K. Riles, N. A. Robertson, J. G. Rollins, C. L. Romel, J. H. Romie, M. P. Ross, K. Ryan, T. Sadecki, E. J. Sanchez, L. E. Sanchez, T. R. Saravanan, R. L. Savage, D. Schaetz, R. Schnabel, E. Schwartz, D. Sellers, T. Shaffer, B. J. J. Slagmolen, J. R. Smith, S. Soni, B. Sorazu, A. P. Spencer, K. A. Strain, L. Sun, M. Thomas, P. Thomas, K. A. Thorne, K. Toland, C. Torrie, G. Traylor, A. L. Urban, G. Valdes, P. J. Veitch, K. Venkateswara, G. Venugopalan, A. D. Viets, T. Vo, C. Vorvick, M. Wade, R. L. Ward, J. Warner, B. Weaver, R. Weiss, B. Willke, C. C. Wipf, L. Xiao, H. Yamamoto, L. Zhang, M. E. Zucker, J. Zweizig
Summary: The motion of a mechanical object, even a human-sized object, should follow the rules of quantum mechanics, but the thermal environment can mask quantum signatures. By reducing temperature and using feedback, researchers were able to prepare a mechanical oscillator with a 10-kilogram mass close to its ground state motion, enabling the possibility of probing gravity in massive quantum systems.
Article
Physics, Multidisciplinary
Ting Lin, Hai-Ou Li, Gang Cao, Guo-Ping Guo
Summary: In this work, we propose a mechanism for coupling a plane structure of four quantum dots with a resonator. We investigate the dependence of the quadruple coupling strength and qubit decoherence rate, and identify the optimal operating position for the hybrid system. Using the input-output theory, we predict the signatures in the resonator spectrum. Additionally, based on previous research, we demonstrate that the device described in this paper can achieve the strong coupling limit, allowing for system extension under existing technical conditions.
Article
Nanoscience & Nanotechnology
Stijn Jooken, Yovan de Coene, Olivier Deschaume, Daniel Zambo, Tangi Aubert, Zeger Hens, Dirk Dorfs, Thierry Verbiest, Koen Clays, Geert Callewaert, Carmen Bartic
Summary: The research demonstrates that the electric field sensitivity of fluorescence intensity of type-I and quasi-type-II quantum dots and quantum rods is enhanced under two-photon excitation, allowing them to track fast switching E-fields. This suggests the potential of semiconductor nanoparticles as cellular voltage probes in multiphoton imaging.
Article
Chemistry, Multidisciplinary
Minho Choi, Mireu Lee, Sung-Yul L. Park, Byung Su Kim, Seongmoon Jun, Suk In Park, Jin Dong Song, Young-Ho Ko, Yong-Hoon Cho
Summary: In this study, a method is proposed to deterministically integrate single quantum dots with tailor-made photonic structures. A nondestructive luminescence picking method called nanoscale-focus pinspot (NFP) is used to reduce the luminous quantum dot density. The selected quantum dot is then deterministically integrated with a tailor-made photonic structure, leading to improved extraction efficiency.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
I. K. M. Reaz Rahman, Shiekh Zia Uddin, Matthew Yeh, Naoki Higashitarumizu, Jongchan Kim, Quanwei Li, Hyeonjun Lee, Kyuho Lee, Hoyeon Kim, Cheolmin Park, Jaehoon Lim, Joel W. Ager III, Ali Javey
Summary: In this study, a metal-oxide-semiconductor capacitor based on CdSe/CdS quantum dot thin films was used to investigate the influence of background charge on the luminescence efficiency and lifetime. By applying a gate voltage, the concentration ratio of charged and neutral quasiparticles in the quantum dots can be controlled, leading to modulation of the photoluminescence intensity and effective lifetime. The findings have potential applications in voltage-controlled electrochromics.
Article
Optics
C. E. Whittaker, T. Dowling, A. Nalitov, A. Yulin, B. Royall, E. Clarke, M. S. Skolnick, I. A. Shelykh, D. N. Krizhanovskii
Summary: An experimental synthetic non-Abelian gauge field for photons was successfully realized in a honeycomb microcavity lattice, revealing its symmetry in the optical spin Hall effect and paving the way for photon manipulation via spin on a chip. The unique fine structure of eigenstates around Dirac points in photonic graphene made of coupled polaritonic microcavities was demonstrated, showing the formation of a Dresselhaus-like effective magnetic field that can be mapped to a non-Abelian gauge field.
Article
Materials Science, Multidisciplinary
Daniel J. Gillard, Armando Genco, Seongjoon Ahn, Thomas P. Lyons, Kyung Yeol Ma, A-Rang Jang, Toby Severs Millard, Aurelien A. P. Trichet, Rahul Jayaprakash, Kyriacos Georgiou, David G. Lidzey, Jason M. Smith, Hyeon Suk Shin, Alexander Tartakovskii
Summary: Two-dimensional semiconducting transition metal dichalcogenides embedded in optical microcavities in the strong exciton-photon coupling regime show promising applications in polaritonic logic gates and circuits. Scalability issues associated with mechanical exfoliation have been addressed with an alternative fabrication method using chemical vapor deposition, enabling the development of large area transition metal dichalcogenide based devices operating in a wide range of temperatures and demonstrating strong light-matter coupling.
Article
Materials Science, Multidisciplinary
Vasily Kravtsov, Aleksey D. Liubomirov, Roman Cherbunin, Alessandro Catanzaro, Armando Genco, Daniel Gillard, Evgeny M. Alexeev, Tatiana Ivanova, Ekaterina Khestanova, Ivan A. Shelykh, Alexander Tartakovskii, Maurice S. Skolnick, Dmitry N. Krizhanovskii, Ivan Iorsh
Summary: Research shows that stable valley polarization can be achieved by adjusting the spin-valley relaxation dynamics in heterobilayers with different structures and optical properties. Through experimental and theoretical analysis, the contributions of interlayer exciton recombination and charge carrier spin depolarization to valley dynamics are uncovered.
Article
Engineering, Electrical & Electronic
Charlotte Ovenden, Ian Farrer, Maurice S. Skolnick, Jon Heffernan
Summary: Atomic force microscopy (AFM) assisted local anodic oxidation (LAO) is a low contamination method for semiconductor fabrication. In this study, we demonstrate the fabrication of deep and highly reproducible nanohole arrays on InP using LAO. The size and depth of the nanoholes and nano-oxide mounds can be controlled independently by altering AFM tip bias and humidity. The oxidation mechanism of semi-insulating InP during LAO is found to be similar to that of plasma oxidation.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Dominic Hallett, Andrew P. Foster, David Whittaker, Maurice S. Skolnick, Luke R. Wilson
Summary: This study demonstrates numerically that spin-dependent chiral coupling can be achieved by embedding a quantum emitter with circularly polarized optical transitions in a waveguide-coupled nanocavity. The experimentally feasible cavity design supports high chiral contrast, efficient cavity-waveguide coupling, and enhanced light-matter interaction strength.
Article
Physics, Applied
Feng Li, Yiming Li, L. Giriunas, M. Sich, D. D. Solnyshkov, G. Malpuech, A. A. P. Trichet, J. M. Smith, E. Clarke, M. S. Skolnick, D. N. Krizhanovskii
Summary: In this study, a tunable open-access microcavity was established to achieve polariton condensation by controlling the light-matter coupling strength through nanopositioners. The experimental results showed that the lowest condensation threshold always occurred at a fixed energy trap depth for different coupling strengths.
JOURNAL OF APPLIED PHYSICS
(2022)
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
Biochemistry & Molecular Biology
Dean A. Houston, Louise A. Stephen, Soher N. Jayash, Katherine Myers, Kirsty Little, Mark Hopkinson, Andrew A. Pitsillides, Vicky E. MacRae, Jose Luis Millan, Katherine A. Staines, Colin Farquharson
Summary: The administration of intermittent parathyroid hormone (iPTH) can enhance bone mineralization and osteogenesis by regulating the expression of key enzymes such as PHOSPHO1.
CELL BIOCHEMISTRY AND FUNCTION
(2023)
Article
Orthopedics
Mark Hopkinson, Gareth Jones, Lucinda Evans, Stephanie Gohin, Ran Magnusdottir, Phil Salmon, Chantal Chenu, Richard Meeson, Behzad Javaheri, Andrew A. Pitsillides
Summary: The need to better understand bone repair processes under different pathophysiological states due to fracture burden highlights the importance of evaluating the structural and material properties of mineralized callus for restoring biomechanical stability. This study shares a new automatic method for segmenting callus in micro-CT tomograms, allowing for objective and quantitative analysis of bone fracture microarchitecture. The results demonstrate that the automatic segmentation reliably and consistently segments callus from cortical bone, providing a faster and less user-dependent tool for studying bone callus in fractures and potentially other applications.
JOURNAL OF ORTHOPAEDIC RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Yun-Ran Wang, Im Sik Han, Mark Hopkinson
Summary: Regular arrays of single III-V quantum dots and quantum rings with high uniformity and good optical quality have been fabricated using molecular beam epitaxy assisted by in situ direct laser interference patterning. These structures serve as a next-generation platform for functional nanophotonic devices and contribute to the future quantum revolution.
Article
Optics
Anthonin Delphan, Maxim N. Makhonin, Tommi Isoniemi, Paul M. Walker, Maurice S. Skolnick, Dmitry N. Krizhanovskii, Dmitry V. Skryabin, Jean-Francois Carlin, Nicolas Grandjean, Raphael Butte
Summary: We observed polariton lasing in micro-ring resonators based on GaN/AlGaN slab waveguides in the UV spectral range, with stimulated polariton relaxation into multiple ring resonator modes. The strong exciton-photon coupling regime was confirmed by the reduction of the free spectral range and the blueshift of the exciton-like modes with increasing pulse energy. The absence of broadening in the exciton emission further confirmed lasing at low electron-hole densities. Overall, our work paves the way for the development of novel UV devices based on high-speed slab waveguide polariton geometry operating up to room temperature and integrated into complex photonic circuits.
Article
Quantum Science & Technology
Hamidreza Siampour, Christopher O'Rourke, Alistair J. Brash, Maxim N. Makhonin, Rene Dost, Dominic J. Hallett, Edmund Clarke, Pallavi K. Patil, Maurice S. Skolnick, A. Mark Fox
Summary: Quantum states of light and matter can be manipulated on the nanoscale to aid the implementation of scalable photonic quantum technologies. A nanophotonic waveguide platform with embedded quantum dots (QDs) was demonstrated, allowing for Purcell-enhanced emission and strong chiral coupling. Record-large radiative decay rate and Purcell enhancement were achieved through electric-field tuning and quasi-resonant excitation. The results show promising prospects for using QDs in scalable implementations of on-chip spin-photonics relying on chiral quantum optics.
NPJ QUANTUM INFORMATION
(2023)
Article
Nanoscience & Nanotechnology
Fahrettin Sarcan, Nicola J. Fairbairn, Panaiot Zotev, Toby Severs-Millard, Daniel J. Gillard, Xiaochen Wang, Ben Conran, Michael Heuken, Ayse Erol, Alexander I. Tartakovskii, Thomas F. Krauss, Gordon J. Hedley, Yue Wang
Summary: Focused ion beam (FIB) is used for precise nanoscale fabrication in functional nanomaterials such as TMDCs. This study investigates the lateral damage caused by FIB milling in large-area monolayer WS2 and identifies three distinct zones of emission with different wavelengths and decay lifetimes. The results provide new avenues for tailoring TMDCs’ optical properties and suggest that distant destruction can be reduced by lowering the ion beam current. It paves the way for creating nanostructures and realizing optoelectronic devices on a wafer scale.
NPJ 2D MATERIALS AND APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Roman Kolodka, Alexander Bartenev, Ki-Tae Eom, Jong-Hoon Kang, Eric E. Hellstrom, Chang-Beom Eom, Armando Rua, Sergiy Lysenko
Summary: The Co-doped BaFe2As2 superconducting films exhibit complex nonlinear optical dynamics and structural transformation over a wide range of temperatures. The angle-resolved light scattering conoscopy reveals the temperature-dependent structural transformation of optimally doped BaFe2As2. Photoinduced excited states dynamics demonstrate the instantaneous formation of nonequilibrium quasiparticles, followed by multi-step thermalization within several picoseconds. These transient processes show noticeable temperature dependence below the superconducting transition point Tc, where they correlate with the surface morphology.
Article
Materials Science, Multidisciplinary
Alexander Bartenev, Roman Kolodka, Camilo Verbel, Manuel Lozano, Felix Fernandez, Armando Rua, Sergiy Lysenko
Summary: We investigated the nonequilibrium dynamics of photoinduced collective excitations in FeSe0.8Te0.2 superconducting thin film. The transient reflectance traces showed three distinct regions corresponding to different dynamical processes. The first two processes occurred within a sub-picosecond timescale and were associated with the photoexcitation of quasi-particles (QP). The first process was attributed to QPs accumulation and was found to be sensitive to structural anisotropy. The longer timescale revealed the generation of strong acoustic phonons.
