Article
Chemistry, Multidisciplinary
Jun-Yu Li, Wei Li, Jin Liu, Jie Zhong, Renming Liu, Huanjun Chen, Xue-Hua Wang
Summary: By integrating a single quantum dot with a single gold nanorod, the strong coupling between quantum dots and plasmonic nanoparticles has been achieved, opening up a new pathway for solid-state quantum information processing. Utilizing a wedge nanogap cavity, the plasmonic electric fields were effectively confined in the nanoshell of the quantum dot, leading to the largest spectral Rabi splitting reported so far.
Article
Quantum Science & Technology
Chol-Min Kim, Nam-Chol Kim, Myong-Chol Ko, Ju-Song Ryom, Hyok-Chol Choe
Summary: We propose a new scheme of multichannel quantum routing for single plasmons using cross-type plasmonic waveguides coupled to four two-level InGaAs quantum dots. The routing properties of the system for incident plasmons are theoretically studied, and the results show that the routing of incident plasmons can be achieved by adjusting physical parameters such as detuning, coupling strengths, and separation distance. The multichannel scheme has potential applications in realizing quantum devices such as quantum routers, filters, couplers, and switches.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Sude Hatem, Ahmad Salmanogli, H. Selcuk Gecim
Summary: In this study, a plasmonic system coupled to a quantum dot is used to generate entanglement between two non-simultaneously emitted output modes. The entanglement appears to be forbidden due to different transition rates, but simulation results show its existence, which can be attributed to the lattice plasmon coupling effect modifying the original transition rates of the quantum dot. This unique behavior allows for the entanglement between output modes with specific frequencies.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
M. Cubrei, V. A. Holovatsky, C. A. Duque
Summary: This study investigates the effect of magnetic field on electron states in Al$_{0.3}$0.3Ga0.7As/GaAs/Al0.3Ga0.7As multilayered quantum dots. The transition energies and photoionisation cross-section are found to strongly depend on impurity position and magnetic field induction. As magnetic field induction increases, the peaks of photoionisation cross-section shift accordingly.
PHILOSOPHICAL MAGAZINE
(2021)
Article
Multidisciplinary Sciences
Satyendra Nath Gupta, Ora Bitton, Tomas Neuman, Ruben Esteban, Lev Chuntonov, Javier Aizpurua, Gilad Haran
Summary: Plasmonic cavities can confine electromagnetic radiation to deep sub-wavelength regimes, allowing for strong coupling phenomena with individual quantum emitters. By studying scattering spectra and using interferometry, researchers observed Rabi splitting and non-classical emission in devices with semiconductor quantum dots, revealing complex interactions between bright and dark states. Model simulations based on an extended Jaynes-Cummings Hamiltonian explained the experimental findings, highlighting the potential of controlling quantum state dynamics through the coupling of quantum emitters to plasmonic cavities.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Jie Wen, Chunhua Yang, Hongmei Liu, Li Xu, Lei Huang, Zichao Jiang, Zhenbin Liang
Summary: This study combines graphene with a conventional quantum dot infrared photodetector, using the principle of surface plasmon to enhance the interaction between graphene and light, improving the absorption rate of QDIP. The highest absorptivity of QDIP with graphene structure is 1.29 times higher than that of conventional QDIP, and the highest absorptivity can reach 98.41%. Additionally, the designed graphene concentric ring structure significantly expands the absorption bandwidth of the QDIP through plasmonic hybridization.
Article
Optics
Pavel Melentiev, Arthur Kuzin, Dmitry Negrov, Victor Balykin
Summary: This study proposes and realizes a single-mode surface plasmon polariton (SPP) waveguide formed by two parallel grooves on a high-quality silver film, reducing metal loss and demonstrating a complex on-chip optical circuit involving SPP plane wave excitation, focusing, and coupling.
Article
Quantum Science & Technology
Nam-Chol Kim, Chol-Min Kim, Myong-Chol Ko, Ju-Song Ryom, Gang-Yong Ri, Gwang-Myong Ryom, Yong-Jin Kim
Summary: In this study, we propose a new multichannel scheme for routing of single plasmons using four quantum dots placed at the junctions of plasmonic waveguides. By controlling parameters such as detuning, coupling strengths, and spacing, different routing effects can be achieved. This multichannel scheme for routing of single plasmons could be used for realizing quantum devices.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Nikita Nefedkin, Michele Cotrufo, Andrea Alu
Summary: Nonreciprocity originating from classical interactions among nonlinear scatterers is explored in this work, offering a promising tool for quantum information processing and quantum computing. It is shown that large nonreciprocal responses can be achieved in nonlinear systems by controlling the position and transition frequencies of the atoms, without requiring a nonreciprocal environment. The connection between this effect and the asymmetric population of a slowly decaying dark state is demonstrated.
Article
Nanoscience & Nanotechnology
Chien-Yu Chen, Chia-Chun Ni, Ruei-Nan Wu, Sheng-Yang Kuo, Chia-Hao Li, Yean-Woei Kiang, C. C. Yang
Summary: The study reveals that surface plasmon coupling reduces FRET efficiency and creates competition. While R6G emission efficiency can be enhanced through SP coupling, the enhancement decreases when R6G is linked onto QD and then self-assembled onto Ag NP, especially when the number of R6G molecules is high.
Article
Quantum Science & Technology
Tasio Gonzalez-Raya, Rodrigo Asensio-Perea, Ana Martin, Lucas C. Celeri, Mikel Sanz, Pavel Lougovski, Eugene F. Dumitrescu
Summary: Digital-analog quantum computation aims to reduce resource requirements by replacing gate sequences with unitary transformations, and we extend the cross-resonance effect to analog Hamiltonians in superconducting architectures. By toggling between different analog Hamiltonians, we simulate the dynamics of Ising, XY, and Heisenberg spin models, achieving Trotter error-free simulations for certain models.
Article
Optics
Mark A. Cappelli, Hossein Mehrpour Bernety, Daniel Sun, Luc Houriez, Benjamin Wang
Summary: In this experiment, non-reciprocal waveguiding is achieved in a microstrip transmission line by coupling the microstrip fields to a magnetized gaseous plasma discharge column. The time-reversal symmetry is broken, resulting in one-way propagation of waves in the microstrip.
Article
Biochemistry & Molecular Biology
Shaobo Yang, Po-Yu Chen, Chia-Chun Ni, Jun-Chen Chen, Zong-Han Li, Yang Kuo, Chih-Chung Yang, Ta-Cheng Hsu, Chi-Ling Lee
Summary: In this paper, the effects of surface plasmon coupling on the modulation responses of LED emission and down-converted lights through quantum dots are elaborated. The enhancement of modulation bandwidth through SP coupling is demonstrated. The results provide insights into the potential applications of SP coupling in improving the performance of LED-based light conversion.
Article
Multidisciplinary Sciences
Mohammed S. Al-Ghamdi, Rafal Z. Bahnam, Ivan B. Karomi
Summary: This report experimentally measured the modal absorption spectra of InP and InAsP quantum dot lasers and calculated the optical absorption cross section and inhomogeneous broadening. The results showed different values for the absorption cross section and broadening between InP and InAsP QD lasers. Alloying can improve the spectral properties of optoelectronic devices.
Article
Chemistry, Multidisciplinary
Margherita Biondi, Min-Jae Choi, Zhibo Wang, Mingyang Wei, Seungjin Lee, Hitarth Choubisa, Laxmi Kishore Sagar, Bin Sun, Se-Woong Baek, Bin Chen, Petar Todorovic, Amin Morteza Najarian, Armin Sedighian Rasouli, Dae-Hyun Nam, Maral Vafaie, Yuguang C. Li, Koen Bertens, Sjoerd Hoogland, Oleksandr Voznyy, F. Pelayo Garcia de Arquer, Edward H. Sargent
Summary: This study introduces a new method to improve facet alignment in CQD solids by adjusting the surface of CQDs, leading to enhanced coupling and improved performance of optoelectronic devices. This approach results in a 10x increase in hole mobility compared to control CQD solids, and enables photodiodes with 70% external quantum efficiency and rapid response times.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Runfang Fu, Daniel E. Gomez, Qianqian Shi, Lim Wei Yap, Quanxia Lyu, Kaixuan Wang, Zijun Yong, Wenlong Cheng
Summary: The study introduces a partial ligand-stripping strategy to fabricate elastomer-supported gold nanobipyramid plasmene nanosheets, which exhibit complex orientation-dependent plasmonic responses to external strains. Plasmonic spectra of approximately 45 degrees oriented samples are shown to be most susceptible to strain at acute polarized angles.
Article
Chemistry, Physical
Chenhui Han, Daniel E. Gomez, Qi Xiao, Jingsan Xu
Summary: The presence of gold antennas significantly enhanced the activity of palladium nanoparticles in the Suzuki-Miyaura cross-coupling reaction. However, excessively high density of gold antennas suppressed the reaction, and the near-field effect affected different substrates to varying extents.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Daniel E. Gomez, Xu Shi, Tomoya Oshikiri, Ann Roberts, Hiroaki Misawa
Summary: We experimentally demonstrate and theoretically study the formation of coherent plasmon-exciton states, which exhibit high absorption of incident light and cancellation of absorption. Our research shows the potential implications of these coherent states and opens the prospect for devices exploiting coherent effects in applications.
Article
Optics
J. J. Miguel Varga, Jon Lasa-Alonso, Martin Molezuelas-Ferreras, Nora Tischler, Gabriel Molina-Terriza
Summary: The study focuses on spatio-temporal correlations of photons produced by spontaneous parametric down conversion, specifically examining how the waists of detection and pump beams influence spectral bandwidth. The results show that the parameter is significantly determined by the spatial properties of the detection beam compared to the pump beam, allowing for easy experimental control of bandwidth. The research also includes Hong-Ou-Mandel interferometry measurements to provide the phase and temporal shape of biphoton wavefunction, explained through a toy model based on certain approximations.
OPTICS COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Lukas Wesemann, Jon Rickett, Timothy J. Davis, Ann Roberts
Summary: The article presents a metasurface that utilizes photonic spin-orbit coupling to create an asymmetric optical transfer function for real-time phase imaging. Experimental results show the generation of high contrast pseudo-3D intensity images without the need for post-processing. This method has potential applications in biological live cell imaging and real-time wavefront sensing.
Article
Quantum Science & Technology
Sergei Slussarenko, Dominick J. Joch, Nora Tischler, Farzad Ghafari, Lynden K. Shalm, Varun B. Verma, Sae Woo Nam, Geoff J. Pryde
Summary: Violating a nonlocality inequality is key to remote quantum information tasks and fundamental tests of quantum physics. In this study, the completion of the quantum steering nonlocality task was demonstrated using optical vector vortex states for transmitting photons, closing the detection loophole. This important breakthrough opens up possibilities for high-efficiency encoding, free-space and satellite-based secure quantum communication devices, and device-independent protocols.
NPJ QUANTUM INFORMATION
(2022)
Article
Chemistry, Physical
Samantha Prabath Ratnayake, Jiawen Ren, Billy J. Murdoch, Joel van Embden, Daniel E. Gomez, Chris F. McConville, Enrico Della Gaspera
Summary: This study demonstrates the fabrication of two-dimensional SnO2 nanosheet arrays and their application as electrodes for solar water oxidation. The nanosheets, when deposited on transparent electrodes, serve as substrates for the deposition of photoactive semiconductors, resulting in improved photoelectrochemical performance. The SnO2 nanosheets alone exhibit negligible PEC activity, suggesting that their enhanced performance is mainly due to their morphology and electronic effects. These findings provide a foundation for further research on efficient photoanode architectures for water splitting.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
William Shepherd, Lesly Melendez, Owen Kendall, Yang Liu, Billy J. Murdoch, Joel van Embden, Daniel E. Gomez, Enrico Della Gaspera
Summary: This study investigates the optical and crystallographic effects of simultaneous doping at both cationic sites in barium stannate crystal. Using a wet chemical method, BaSnO3 nanoparticles were synthesized and doped with lanthanum and/or antimony. Doping was validated and analyzed using EDX, XPS, and absorption spectroscopy. The effects of doping on crystal size, strain, and plasmonic properties were evaluated through XRD and TEM. The findings show that doping at both sites reduces lattice strain, decreases defects, and increases particle size.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Lesly V. Melendez, Joel Van Embden, Timothy U. Connell, Noel W. Duffy, Daniel E. Gomez
Summary: Using single-particle electron energy loss spectroscopy, the relationship between the geometrical and compositional details of individual nanostructures and their carrier extraction efficiencies is explored. Rational design of metal-semiconductor nanostructures enables efficient energy harvesting, with optimal structures achieving efficiencies as high as 45%.
Article
Chemistry, Multidisciplinary
Michael Wilms, Lesly V. Melendez, Rohan J. Hudson, Christopher R. Hall, Samantha Prabath Ratnayake, Trevor Smith, Enrico Della Gaspera, Gary Bryant, Timothy U. Connell, Daniel E. Gomez
Summary: We introduce a novel composite material composed of silver nanoparticles and three-dimensional molecular organic cages based on light-absorbing porphyrins. The porphyrin cages not only stabilize the particles but also enable diffusion and trapping of small molecules near the metallic surface. The combination of these two photoactive components leads to a Fano-resonant interaction, resulting in increased energy transfer and enhanced photocurrent for water-splitting applications. This composite structure demonstrates the potential of advanced photosensitizer systems with intrinsic porosity for photocatalytic and sensing applications.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Daniel J. Tibben, Gus O. Bonin, Inseong Cho, Girish Lakhwani, James Hutchison, Daniel E. Gomez
Summary: Research into strong light-matter interactions continues to fascinate, driven by surprising experimental observations. Strong light-matter interactions have been found to significantly alter the properties of materials, particularly in intermolecular energy transfer. This review provides a concise account of the fundamental concepts of intermolecular energy transfer and how they are modified by strong light-matter interactions, highlighting recent experimental advances and the potential for future research in this exciting field.
Article
Chemistry, Multidisciplinary
Owen Kendall, Lesly Melendez, Jiawen Ren, Samantha Prabath Ratnayake, Billy J. Murdoch, Edwin L. H. Mayes, Joel van Embden, Daniel E. Gomez, Arrigo Calzolari, Enrico Della Gaspera
Summary: In this study, spinel copper gallate (CuGa2O4) nanocrystals with an average size of 3.7 nm were synthesized and characterized via a heat-up colloidal reaction. The CuGa2O4 nanocrystals have a band gap of -2.5 eV and exhibit p-type character, which is consistent with ab initio simulations. When deposited as thin films, these novel nanocrystals are shown to be photoactive, generating a clear and reproducible photocurrent under blue light irradiation. The ability to adjust the Cu/Ga ratio within the nanocrystals and its effect on their optical and electronic properties was also demonstrated. These findings position CuGa2O4 nanocrystals as a promising material for optoelectronic applications, including hole transport and light harvesting.
Article
Nanoscience & Nanotechnology
Thomas Feeney, Gabriel Aygur, Tony Nguyen, Sidra Farooq, Joao Mendes, Hayden Tuohey, Daniel E. Gomez, Enrico Della Gaspera, Joel van Embden
Summary: Post transition metal chalcohalides are promising semiconductor materials for optoelectronic applications. Bismuth oxyiodide (BiOI) is especially interesting due to its stability, low toxicity, and defect tolerance. In this study, pin-hole free and pure BiOI thin films were successfully fabricated using a solution processed method. All-inorganic solar cells based on these films were also fabricated for the first time, with device improvements rivaling vacuum deposited devices achieved through templating film growth. The BiOI thin films and devices presented here provide an excellent platform for the further development of solution processed bismuth chalcohalide optoelectronic devices.
Article
Nanoscience & Nanotechnology
Timothy J. Davis, Frank J. Meyer zu Heringdorf, Harald Giessen
Summary: This study investigates the topological properties of surface plasmon polariton fields with orbital angular momentum through theoretical expressions and experiments. It is found that phase singularities correspond to vortex centers in the rotating fields. The results show that the topology can change discontinuously as the orbital angular momentum varies, and the topological charges do not always equate with the orbital angular momentum.
Article
Chemistry, Multidisciplinary
Joao Otavio Mendes, Gabriel Aygur, Jesus Ibarra Michel, James Bullock, Daniel Gomez, Enrico Della Gaspera, Joel van Embden
Summary: In this study, highly (001) oriented Sb2Se3 nanorod layers were obtained via a novel template growth method and transferred to functional substrates. Photodetector devices with excellent electrical contact were fabricated using a low-temperature processable SnO2 nanoparticle transport layer and encapsulation/etching techniques. A proof-of-concept self-powered flexible heart rate monitor was also fabricated based on this platform. The achievement of transferable Sb2Se3 nanorod layers has significant implications for the development of new device architectures and potential applications in various fields.
ADVANCED MATERIALS INTERFACES
(2023)
