Article
Nanoscience & Nanotechnology
Saskia Fiedler, Sergii Morozov, Danylo Komisar, Evgeny A. A. Ekimov, Liudmila F. F. Kulikova, Valery A. A. Davydov, Viatcheslav N. N. Agafonov, Shailesh Kumar, Christian Wolff, Sergey I. I. Bozhevolnyi, N. Asger Mortensen
Summary: Impurity-vacancy centers in diamond provide a class of robust photon sources with versatile quantum properties. The ensembles of color centers have tunable photon-emission statistics and their emission properties can be controlled by different types of excitation. Electron-beam excitation can synchronize the emitters' excitation and control the second-order correlation function g(2)(0), as confirmed by experimental results in this letter. Such a photon source based on an ensemble of few color centers in a diamond crystal offers a highly tunable platform for room temperature informational technologies.
Article
Nanoscience & Nanotechnology
Magdalena Sola-Garcia, Kelly W. Mauser, Matthias Liebtrau, Toon Coenen, Silke Christiansen, Sophie Meuret, Albert Polman
Summary: Photon bunching in incoherent cathodoluminescence spectroscopy results from the interaction of high-energy electrons with a material, generating multiple photons and revealing key properties of electron-matter excitation. An analytical model has been developed to describe the amplitude and shape of the second order autocorrelation function for continuous and pulsed electron beams, including ultrashort pulses. Experimental data on InGaN/GaN quantum wells show good agreement with the model, providing insights on excitation efficiencies and nonlinear effects.
Article
Microscopy
Michael Scheucher, Thomas Schachinger, Thomas Spielauer, Michael Stoeger-Pollach, Philipp Haslinger
Summary: We propose a method to separate coherent and incoherent contributions of cathodoluminescence (CL) using a time-resolved coincidence detection scheme. The method allows discrimination and quantification of coherent and incoherent CL, providing additional information for material characterization and facilitating the study of coherent electron-matter interaction.
Article
Astronomy & Astrophysics
Roy Barzel, David Edward Bruschi, Andreas W. Schell, Claus Laemmerzahl
Summary: We study the influence of the relativistic redshift on Hong-Ou-Mandel (HOM) interference and present a genuine quantum test of general relativity. We use Glauber's theory of quantum coherence to predict the coincidence probability of realistic broadband photons in HOM experiments and extend the quantum field theoretical framework to describe the deformation of the spectral profile of multiple photons. The results show that the mutual redshift between sender and receiver can switch the coincidence statistics from photon bunching to photon antibunching and vice versa.
Article
Physics, Multidisciplinary
V. Ye Len, M. M. Byelova, V. A. Uzunova, A. A. Semenov
Summary: This paper investigates realistic photodetection in a generalization of the Hong-Ou-Mandel experiment, revealing important nonclassical properties. Imperfections in realistic detectors may cause deviations in photocounting probabilities from theoretical values. Analytical expressions for photocounting distributions in the generalized Hong-Ou-Mandel experiment for realistic photon-number resolving detectors were derived, showing that probabilities of properly postselected events are proportional to those obtained for perfect detectors.
Article
Physics, Applied
H. Li, J. Y. Ou, B. Gholipour, J. K. So, D. Piccinotti, V. A. Fedotov, N. Papasimakis
Summary: Our experimental results show that embedding nanodiamonds in thin chalcogenide films can significantly decrease the distribution of decay rates of nitrogen-vacancy centers in diamonds by over five times.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Applied
Yujiro Eto
Summary: The proposed method aims to improve imaging depth of two-photon excitation microscopy using correlated ultrafast intensity fluctuations within pulses. Experimental demonstration shows local control of two-photon excitation can be achieved by harnessing ultrafast intensity cross-correlation generated by high-gain parametric down-conversion. It is expected that background photons' influence can be suppressed by applying this technique to the two-photon excitation microscopy.
APPLIED PHYSICS EXPRESS
(2021)
Article
Physics, Multidisciplinary
Ya Yang, Jing Lu, Lan Zhou
Summary: In this study, a few-photon router is proposed, which utilizes a single qubit chirally coupled to two independent waveguides to achieve photon routing. The results show that the router is capable of directing one and two photons from one waveguide to an arbitrarily selected port of the other waveguide.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Fatemeh Davoodi, Nahid Talebi
Summary: Van der Waals materials such as TMDCs exhibit strongly bound exciton states in the visible spectrum, providing an ideal platform for exciton-photon couplings. Utilizing nanometer-thick semiconducting TMDCs combined with metals can significantly increase light-matter interaction. In gold-WSe2 multilayers, both exciton A and exciton B can strongly interact with surface-plasmon polaritons, leading to CL emission suppression and revealing energy transfer between excitons and plasmons in the form of nonradiating guided waves.
ACS APPLIED NANO MATERIALS
(2021)
Article
Optics
Poulami Ghosh, Dapeng Yu, Gaomin Li, Mingyuan Huang, Yingkai Liu
Summary: Through various optical measurements, it was found that the decrease in diameter of gallium nitride microrods results in a blueshift in the band gap energy due to the formation of whispering gallery mode polaritons. Raman spectra confirmed that the band gap energy changes were not due to stress/strain or different doping concentrations. Photoluminescence experiments revealed that the exciton photon coupling strength depends on the microrod diameter and decreases as the diameter decreases.
Article
Physics, Multidisciplinary
Yanqiang Guo, Jianfei Zhang, Xiaomin Guo, Stephan Reitzenstein, Liantuan Xiao
Summary: The emission characteristics of quantum-dot micropillar lasers (QDMLs) lie at the intersection of nanophotonics and nonlinear dynamics, providing an ideal platform for studying the optical interface between classical and quantum systems. In this research, a noise-induced bimodal QDML with orthogonal dual-mode outputs is modeled, and the nonlinear dynamics, stochastic mode jumping, and quantum statistics are investigated. The results show that noise-induced effects lead to the emergence of two intensity bifurcation points for the strong and weak modes, and the maximum output power of the strong mode increases with the noise intensity. The anti-correlation of the two modes reaches its maximum at the second intensity bifurcation point. The dual-mode stochastic jumping frequency and effective bandwidth can exceed 100 GHz and 30 GHz under the noise-induced effect. Photon bunching (g((2))(0) > 1) of both modes is observed over a wide range of noise intensities and injection currents. The photon number distribution of the strong or weak mode becomes a mixture of Bose-Einstein and Poisson distributions, with the proportion of the Poisson distribution increasing in the high injection current region for the strong mode and decreasing for the weak mode.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Sotatsu Yanagimoto, Naoki Yamamoto, Tatsuro Yuge, Hikaru Saito, Keiichirou Akiba, Takumi Sannomiya
Summary: This study proposes a time-correlated electron and photon counting microscopy that allows tracking of the relaxation dynamics of luminescent materials. By counting coincidence events of primary electrons and generated photons, a unique lifetime of the emitter can be extracted. Through observation of correlation changes, the presence of pair correlation from electron-photon entanglement is also discovered.
COMMUNICATIONS PHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Ourania Altiparmaki, Marcel Kleinherenbrink, Marc Naeije, Cornelis Slobbe, Pieter Visser
Summary: This article presents the first spectral analysis of fully-focused Synthetic Aperture Radar (FFSAR) altimetry data, aiming to study backscatter modulations caused by swells. By normalizing and projecting the waveforms, satellite altimetry can be utilized to retrieve swell information. The analysis of FFSAR spectra is supported by buoy-derived swell-wave spectra, and it helps to understand the side-looking SAR spectra.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Optics
Sally Cole Johnson
Summary: Quantum physicists have proven that the polarization of photons can be fine-tuned to enhance photon bunching, contradicting a rule in quantum photonics.
Article
Optics
P. R. Berman, H. Nguyen, Y. Mei, Y. Li, A. Kuzmich
Summary: This paper investigates the phenomenon of superbunching or antibunching when a coherent field is combined with the phase-matched output of an atomic ensemble. It also explores how the nonclassical characteristics of atomic emission can be amplified through homodyning. Furthermore, the effects of dephasing produced by Rydberg-Rydberg interactions on bunching and antibunching are analyzed, highlighting the critical roles of the particle separation probability distribution and the joint particle separation probability distribution.
Article
Materials Science, Multidisciplinary
Murilo Moreira, Matthias Hillenkamp, Giorgio Divitini, Luiz H. G. Tizei, Caterina Ducati, Monica A. Cotta, Varlei Rodrigues, Daniel Ugarte
Summary: Scanning transmission electron microscopy is a crucial tool for achieving sub-nanometric spatial resolution in nanoscience. Machine learning, particularly principal component analysis (PCA), can be used to denoise large datasets generated by this technique. In this study, the effect of PCA on quantitative chemical analysis of binary alloy nanoparticles was analyzed using experiments and simulations. The results demonstrate the potential of PCA denoising, but also highlight the need for careful analysis and design to avoid artifacts and ensure reliable quantification.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Yves Auad, Cyrille Hamon, Marcel Tence, Hugo Lourenco-Martins, Vahagn Mkhitaryan, Odile Stephan, F. Javier Garcia de Abajo, Luiz H. G. Tizei, Mathieu Kociak
Summary: Whispering-gallery mode resonators contain multiple trapped narrow-band circulating optical resonances, with potential applications in quantum electrodynamics, optomechanics, and sensing. Despite the challenges posed by the spherical symmetry and low field leakage of dielectric microspheres, the interaction between whispering-gallery modes and metallic nanoparticles can effectively excite high-quality cavity modes with the potential for optical sensing and light manipulation.
Article
Materials Science, Multidisciplinary
Murilo Moreira, Matthias Hillenkamp, Giorgio Divitini, Luiz H. G. Tizei, Caterina Ducati, Monica A. Cotta, Varlei Rodrigues, Daniel Ugarte
Summary: Analytical studies of nanoparticles often rely on large datasets and machine learning tools. This study investigated the impact of principal component analysis (PCA) processing on data reliability, and found that PCA treatment can reduce noise and improve the accuracy of quantitative analysis.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Vijayanath Elakkat, Eskedar Tessema, Chia-Her Lin, Xiaoping Wang, Huan-Cheng Chang, You-Ning Zheng, Yu-Cheng Huang, Zhong-Yun Gurumallappa, Zhong-Yun Zhang, Ka Long A. Chan, Hening A. S. Rahayu, Joseph S. Francisco, Norman Lu
Summary: To understand the effect of non-covalent weak interactions on molecules, we investigated different types of weak interactions in fluorinated chiral zinc complexes, including improper H-bonding, tetrel bonds, and halogen bonds. High resolution neutron diffraction studies revealed elongation and shortening of the methylene carbon-hydrogen bond due to tetrel bonds and improper H-bond interactions, respectively. We demonstrated how multiple weak interactions can cumulatively affect the C-H bond and offset its elongation through formation of an improper H-bond. Non-covalent interaction and electrostatic potential analysis investigations confirmed the nature of these interactions using density functional theory (DFT) and related calculations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Teng- Yang, Terumitsu Azuma, Yu-Wen Huang, Yuen Yung Hui, Cheng-Tien Chiang, Huan-Cheng Chang
Summary: This work measured the stimulated emission cross sections of neutral nitrogen-vacancy (NV0) defects in single-crystal diamond by two-photon excitation. The peak stimulated emission cross section of NV0 centers was found to be 1.43 +/- 0.07 x 10(-17) cm(2) at 650 nm. The thermal shifts of the zem-phonon line of NV0 centers in nanoscale diamonds were also examined, and a temperature measurement sensitivity of 0.2 K.Hz(-1/2) was achieved.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Ching-Shuan Huang, Chih-Hsun Hsiao, Yu-Chia Chang, Chih-Hsiang Chang, Jen-Chang Yang, James L. Gutmann, Huan-Cheng Chang, Haw-Ming Huang, Sung-Chih Hsieh
Summary: This study aimed to investigate the efficacy of using nano and submicron diamonds in irrigation solutions with sonic and ultrasonic oscillation for removing the smear layer during endodontic treatment. The results showed that specific sizes of nano and submicron diamond irrigation solutions can be used as an alternative approach to removing the smear layer through sonic and ultrasonic oscillation. The potential clinical application of root canal treatments can be expected.
Article
Chemistry, Multidisciplinary
Haotian Wen, David Kordahl, Inga C. Kuschnerus, Philipp Reineck, Alexander Macmillan, Huan-Cheng Chang, Christian Dwyer, Shery L. Y. Chang
Summary: Nitrogen vacancy (NV) centers in fluorescent nanodiamonds (FNDs) are important for quantum sensors due to their luminescence, stability, and biocompatibility. The shape of FNDs significantly affects their fluorescence brightness, with thin, flake-shaped particles being several times brighter and decreasing particle sphericity leading to increased fluorescence.
Article
Chemistry, Analytical
Trong-Nghia Le, Hsin-Yi Chen, Xuan Mai Lam, Chi-Chia Wang, Huan-Cheng Chang
Summary: Nanodiamonds (NDs) have been developed as in vitro diagnostic sensors for two complementary assays: particle-enhanced turbidimetric immunoassay (PETIA) and spin-enhanced lateral flow immunoassay (SELFIA). These NDs, with a largerefractiveindex, emit bright red fluorescence when excited by green light. In experiments using CRP as the target antigen, anti-CRP-conjugated NDs displayed high colloidal stability and low limits of detection.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Teng- Yang, Yuen Yung Hui, Jen-Iu Lo, Yu-Wen Huang, Yin-Yu Lee, Bing-Ming Cheng, Huan-Cheng Chang
Summary: This study demonstrates the use of fluorescent nanodiamonds (FNDs) with nitrogen-vacancy (NV) centers as scintillators for imaging and characterizing extreme ultraviolet (EUV) radiation. The FNDs form a stable thin film and can emit bright red fluorescence when excited by EUV light. An FND-based imaging device has been developed for beam diagnostics of synchrotron radiations.
Article
Biotechnology & Applied Microbiology
Hsin-Hung Lin, Chih-Yen Wang, Feng-Jen Hsieh, Fang-Zhen Liao, Yu-Kai Su, Minh Dinh Pham, Chih-Yuan Lee, Huan-Cheng Chang, Hsao-Hsun Hsu
Summary: This study investigated the use of nanodiamonds (NDs) and fluorescent nanodiamonds (FNDs) as additives in Freund's adjuvant to enhance immune responses and inhibit tumor growth. The results showed that the new formulation significantly enhanced immune responses and had therapeutic effects on tumor growth.
Article
Physics, Multidisciplinary
Hai-Yin Wu, Gokberk Kabacaoglu, Ehssan Nazockdast, Huan-Cheng Chang, Michael J. Shelley, Daniel J. Needleman
Summary: This article introduces two methods for studying subcellular dynamics, one using laser ablation and the other assessing fluid flow. It is found that cortical pulling forces can explain various behaviors of centrosomes.
Article
Nanoscience & Nanotechnology
Florian Semmer, Marie-Charlotte Emperauger, Colin Lopez, Christine Bogicevic, Francois Treussart, Karen Perronet, Francois Marquier
Summary: This article describes a three-dimensional real-time tracking technique based on nonlinear nanocrystals and a digital micromirror device, which can accurately assess biological processes and provide detailed information about molecular dynamics.
Article
Chemistry, Analytical
Wesley Wei -Wen Hsiao, Gianna Fadhilah, Cheng-Chung Lee, Ryu Endo, Yu-Jou Lin, Stefanny Angela, Chia-Chi Ku, Huan-Cheng Chang, Wei -Hung Chiang
Summary: Avian influenza virus (AIV), a zoonotic virus, can infect humans with a high mortality rate. The development of rapid, selective, and accurate detection methods is crucial. Nanotechnology provides a promising approach as nanomaterial-based biosensors offer eco-friendly, portable, and sensitive diagnostic systems with a low detection limit. This paper reviews advanced nanomaterial-based biosensors for AIV detection and discusses potential trial protocols and key issues in their development.
Article
Physics, Applied
Nadezda Varkentina, Yves Auad, Steffi Y. Woo, Florian Castioni, Jean-Denis Blazit, Marcel Tence, Huan-Cheng Chang, Jeson Chen, Kenji Watanabe, Takashi Taniguchi, Mathieu Kociak, Luiz H. G. Tizei
Summary: Electron-photon temporal correlations in electron energy loss spectroscopy and cathodoluminescence spectroscopy have been used to measure the relative quantum efficiency of materials. It has been found that cathodoluminescence excitation spectroscopy can also be used to measure the decay time of excitations and explore the energy dependence of decay time. By using well-known insulating materials, nanodiamonds with NV0 defects and hexagonal boron nitride with 4.1 eV defects, the instrumental response function has been characterized, and the measured lifetimes of the defects match previous reports.
APPLIED PHYSICS LETTERS
(2023)
Proceedings Paper
Thermodynamics
Emmanuel Sarraute, Thibauld Cazimajou, Frederic Richardeau
Summary: Understanding the behavior of electrothermal SiC power Mosfets in extremely abnormal operations such as short-circuits is crucial for certification, especially in critical or long-life applications. However, simulating short-circuits in electronic components is challenging and requires a fully electric and thermal Multiphysics model. This article presents a numerical finite element model that fully simulates in 2D the dynamic electrothermal behavior of a SiC power transistor in short-circuit regime, providing higher geometric precision compared to existing 1D models.
2023 24TH INTERNATIONAL CONFERENCE ON THERMAL, MECHANICAL AND MULTI-PHYSICS SIMULATION AND EXPERIMENTS IN MICROELECTRONICS AND MICROSYSTEMS, EUROSIME
(2023)
