Article
Chemistry, Multidisciplinary
Jingang Li, Kan Yao, Yun Huang, Jie Fang, Pavana Siddhartha Kollipara, Donglei Emma Fan, Yuebing Zheng
Summary: In this work, chemically synthesized transition metal dichalcogenide (TMDC) nanowires are used as dielectric nanoresonators to support both excitonic and Mie resonances. Strong light-matter couplings and tunable exciton polaritons are demonstrated in individual nanowires. The TMDC nanoresonators, with highly tunable optical properties, have potential applications in tunable optical nanodevices.
ADVANCED MATERIALS
(2022)
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
Chemistry, Multidisciplinary
Di Zhang, Dawei Zhai, Sha Deng, Wang Yao, Qizhong Zhu
Summary: Excitons in monolayer transition metal dichalcogenide are entangled in both valley and orbital angular momentum when confined by a strain field. By tuning the trap profile and magnetic field, the exciton states can be engineered and used as polarization-OAM locked single photon emitters, which can also be entangled under certain conditions and highly tunable by strain trap and magnetic field. This proposal provides a novel scheme for generating polarization-OAM locked/entangled photons at the nanoscale, with high integrability and tunability, promising exciting opportunities for quantum information applications.
Article
Chemistry, Multidisciplinary
Chentao Li, Xin Lu, Ajit Srivastava, S. David Storm, Rachel Gelfand, Matthew Pelton, Maxim Sukharev, Hayk Harutyunyan
Summary: This study presents the first experimental investigation of the nonlinear properties of monolayer transition metal dichalcogenides coupled to metal plasmonic nanocavities, showing a pronounced splitting in the pump-frequency dependence of the second-harmonic signal. Numerical simulations utilizing a nonperturbative nonlinear hydrodynamic model of conduction electrons support this interpretation and reproduce experimental results.
Article
Optics
Min-Soo Hwang, Hong-Gyu Park
Summary: Lithographically designed potential wells in monolayer WS2 microcavities can manipulate nonlinear transition-metal dichalcogenide polaritons and enhance the interaction strength between polaritons and the reservoir.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Biswajit Datta, Mandeep Khatoniar, Prathmesh Deshmukh, Felix Thouin, Rezlind Bushati, Simone De Liberato, Stephane Kena Cohen, Vinod M. Menon
Summary: Realizing nonlinear optical response in the low photon density limit in solid-state systems has been a long-standing challenge. Semiconductor microcavities hosting exciton-polaritons have emerged as attractive candidates in this context. However, the weak interaction between these quasiparticles has been a hurdle in this quest. Dipolar excitons provide an attractive strategy to overcome this limitation. The interlayer dipolar excitons in bilayer MoS2 alleviate this issue and demonstrate unprecedented nonlinear interaction strengths compared to conventional A excitons. These highly nonlinear dipolar polaritons will likely be a frontrunner in the quest for solid-state quantum nonlinear devices.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Philip A. Thomas, Kishan S. Menghrajani, William L. Barnes
Summary: The study demonstrates that external structures are unnecessary for achieving room-temperature ultrastrong light-matter coupling. This discovery could aid in the design of experiments to probe polaritonic chemistry and suggests that polaritonic states may be easier to realize than previously thought.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Multidisciplinary Sciences
L. Lackner, M. Dusel, O. A. Egorov, B. Han, H. Knopf, F. Eilenberger, S. Schroeder, K. Watanabe, T. Taniguchi, S. Tongay, C. Anton-Solanas, S. Hoefling, C. Schneider
Summary: Researchers demonstrated lattice polaritons with excitons in a WS2 monolayer strongly coupled to an imprinted photonic lattice in a tunable open optical cavity at room temperature, showing reconfigurability over a spectral window exceeding 85 meV and systematic variation of nearest-neighbor coupling. The technology presented in this work is a critical step towards reconfigurable photonic emulators operated with non-linear photonic fluids, offering simple experimental implementation and working at ambient conditions.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
F. A. Benimetskiy, A. Yulin, A. O. Mikhin, V Kravtsov, I. Iorsh, M. S. Skolnick, I. A. Shelykh, D. N. Krizhanovskii, A. K. Samusev
Summary: Recently reported large values of exciton-polariton nonlinearity of transition metal dichalcogenide (TMD) monolayers coupled to optically resonant structures approach the values characteristic for GaAs-based systems in the regime of strong light-matter coupling. Contrary to the latter, TMD-based polaritonic devices remain operational at ambient conditions and therefore have greater potential for practical nanophotonic applications.
Article
Nanoscience & Nanotechnology
Zhen Wang, Hao Sun, Qiyao Zhang, Jianxing Zhang, Jialu Xu, Jiacheng Tang, Cun-Zheng Ning
Summary: This paper investigates the evolution of the coupled exciton-trion system in electrically gated monolayer MoTe2 devices. The exciton density exhibits an abnormal three-stage scaling behavior, which is different from traditional linear scaling. Surprisingly, the authors discovered a complete analogy of this behavior with the threshold of a conventional laser and proved mathematically that the exciton-trion equations are identical to the laser equations.
Article
Chemistry, Multidisciplinary
Qing-Hua Xu, Jia Shi, Zexin Lin, Ziyu Zhu, Jiadong Zhou, Guo Qin Xu
Summary: The optoelectronic properties of two-dimensional transition metal dichalcogenide monolayers, such as WS2, are largely determined by excitons. The study demonstrates that incorporating a plasmonic cavity enhances the nonlinear optical properties of WS2, allowing for the precise determination of high order Rydberg excitonic states.
Article
Nanoscience & Nanotechnology
Javier Hernandez-Rueda, Marc L. Noordam, Irina Komen, L. Kuipers
Summary: This study investigates the nonlinear optical properties of a WS2 monolayer at room temperature, demonstrating a correlation between nonlinear photoluminescence and several nonlinear optical processes. The results contribute to a better understanding of the optical mechanisms in transition-metal dichalcogenides and have the potential to expand the applications of nonlinear processes of 2D materials in various fields.
Article
Chemistry, Multidisciplinary
Diego Scolfaro, Matheus Finamor, Luca O. Trinchao, Barbara L. T. Rosa, Andrey Chaves, Paulo Santos, Fernando Iikawa, Odilon D. D. Couto
Summary: Researchers have successfully tuned the optical emission energies and dissociated excitonic states in MoSe2 monolayers using the 220 MHz in-plane piezoelectric field carried by surface acoustic waves. By transferring the monolayers to high dielectric constant piezoelectric substrates, they efficiently quenched and red-shifted the excitonic optical emissions. The in-plane polarizabilities obtained from the acoustically induced Stark effect are considerably larger than those reported for monolayers encapsulated in hexagonal boron nitride, showing potential for manipulating and modulating multiexciton interactions in two-dimensional semiconductor nanostructures for optoelectronic applications.
Article
Physics, Multidisciplinary
C. Mc Keever, M. H. Szymanska
Summary: Accurately describing the dynamics steady states of driven and/or dissipative but quantum correlated lattice models is crucial in various scientific fields, from quantum information to biology. The developed tensor network method, based on an infinite projected entangled pair operator ansatz, is efficient for numerical simulations in the thermodynamic limit. By incorporating techniques for optimal truncations and comparing with numerically exact calculations, the method demonstrates power in capturing substantial entanglement in non-mean-field limits.
Article
Chemistry, Multidisciplinary
Rafal Mirek, Andrzej Opala, Paolo Comaron, Magdalena Furman, Mateusz Krol, Krzysztof Tyszka, Bartlomiej Seredynski, Dario Ballarini, Daniele Sanvitto, Timothy C. H. Liew, Wojciech Pacuski, Jan Suffczynski, Jacek Szczytko, Michal Matuszewski, Barbara Pietka
Summary: The rapid development of artificial neural networks and applied artificial intelligence has led to various applications, but current software implementation is limited in terms of performance and energy efficiency. Further progress may require the development of neuromorphic systems mimicking the structure of the human brain. By utilizing an optical network of nodes and semiconductor microcavities, efficient computation with nonlinearity can be achieved, showing promising results in pattern recognition tasks. This work opens up possibilities for ultrafast and energy-efficient neuromorphic systems leveraging the optical nonlinearity of polaritons.
Article
Physics, Multidisciplinary
Yan Meng, Xiaoxiao Wu, Yaxi Shen, Dong Liu, Zixian Liang, Xiang Zhang, Jensen Li
Summary: This article introduces a new device based on non-Hermitian topological systems, which combines the advantages of topological robustness and non-Hermiticity to achieve continuous and quantitative control of energy distribution ratio of waves. The device can be used as a sensitive beam splitter or a coupler switch, with potential applications in elastic circuits or networks.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Materials Science, Multidisciplinary
Lei Kang, Yuhao Wu, Xuezhi Ma, Shoufeng Lan, Douglas H. Werner
Summary: Momentum-space polarization vortices in photonic structures based on BICs can generate optical vortex beams, while harmonic generation from nanostructures exhibits a nonlinear geometric phase. Third- and fifth-harmonic optical vortex generation from an amorphous silicon photonic crystal slab has been numerically demonstrated, showing that the topological charge of the nth-harmonic OV beams follows a certain pattern determined by the nonlinearity phase. By exploiting harmonic multiplexing, the channel capacity of OV generators based on topologically protected optical BICs can be significantly improved.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Chemical
Tianzhu Fan, Wei Deng, Xuhui Feng, Shoufeng Lan, John Pellessier, Ying Li
Summary: This study developed a unique water desalination process that integrates solar steam generation with electrochemical degradation to effectively treat saline water containing organics. The process exhibits strong synergistic effects and achieves improved degradation rate and steam generation rate through optimized structural design.
Review
Nanoscience & Nanotechnology
Sean P. Rodrigues, Preston Cunha, Kaushik Kudtarkar, Ercan M. Dede, Shoufeng Lan
Summary: Advanced photonic nanostructures have enabled the maximization of synthetic chiroptic activities. The unique structuring of these building blocks has empowered chiral selective interactions with electromagnetic waves in plasmonic structures and dielectric media. The advances in active and nonlinear chiral metamaterials have the potential to revolutionize applications in biochemistry, valleytronics, spintronics, and chiral quantum optics.
JOURNAL OF NANOPHOTONICS
(2022)
Article
Nanoscience & Nanotechnology
Muzhaozi Yuan, Xuhui Feng, Tian-Hao Yan, Jingfan Chen, Xuezhi Ma, Preston Cunha, Shoufeng Lan, Ying Li, Hong-Cai Zhou, Ya Wang
Summary: In this study, a novel superparamagnetic iron oxide-enclosed hollow gold nanoshell (SPIO-HGNS) structure with tunable size and surface plasmon resonance (SPR) in the near-infrared (NIR) range was designed and synthesized. The study explored the tuning of SPR properties in NIR-responsive magneto-plasmonic nanoparticles through a facile preparation procedure, paving the way for potential applications in photothermal therapies.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Optics
Xuezhi Ma, Yuan Ma, Preston Cunha, Qiushi Liu, Kaushik Kudtarkar, Da Xu, Jiafei Wang, Yixin Chen, Zi Jing Wong, Ming Liu, M. Cynthia Hipwell, Shoufeng Lan
Summary: Resonance plays a crucial role in modern optics and photonics. Traditional deep learning approaches struggle to predict high-quality-factor resonances accurately, but the Resonance Informed Deep Learning (RIDL) strategy achieves rapid and precise prediction of optical responses for ultra-high-Q-factor resonances.
LASER & PHOTONICS REVIEWS
(2022)
Article
Multidisciplinary Sciences
Kai Peng, Renjie Tao, Louis Haeberle, Quanwei Li, Dafei Jin, Graham R. Fleming, Stephane Kena-Cohen, Xiang Zhang, Wei Bao
Summary: In this study, a series of quantum fluid phase transitions from classical fluids to superfluids and supersonic fluids were observed in halide perovskite single crystals at room temperature. This provides a foundation for exploring non-equilibrium quantum fluid many-body physics at room temperature.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Xuezhi Ma, Kaushik Kudtarkar, Yixin Chen, Preston Cunha, Yuan Ma, Kenji Watanabe, Takashi Taniguchi, Xiaofeng Qian, M. Cynthia Hipwell, Zi Jing Wong, Shoufeng Lan
Summary: This study introduces an efficient solution to manipulate dark excitons by reintroducing photonics bound states in the continuum (BICs), enabling giant enhancement and highly directional emission of dark excitons. The directional emission is coherent at room temperature, shown through polarization analyses and interference measurements.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Zhao-dong Meng, Zhong-qun Tian, Jun Yi
Summary: Tip-enhanced Raman spectroscopy (TERS) provides nanoscale topographic and chemical information with high sensitivity and spatial resolution, determined by the lightning-rod effect and local surface plasmon resonance (LSPR). Traditional 3D numerical simulations for optimizing TERS probe structure are resource-intensive, but a rapid theoretical method using inverse design can achieve effective optimization while reducing computational loading. By applying this method to a TERS probe, an order of magnitude improvement in enhancement factor (|E/E0|2) was observed compared to a parameter sweeping 3D simulation that would take around 7000 hours. This method shows promise for designing TERS probes, near-field optical probes, and optical antennas.
Article
Engineering, Chemical
Tianzhu Fan, Shoufeng Lan, Ying Li
Summary: A synergistic, adaptive, continuous-flow, and low-carbon solar evaporation and electrochemical treatment (SEET) system was proposed and researched for energy-efficient and sustainable decentralized water treatment. The system integrated anodic oxidation with solar evaporation to enhance organic degradation and optimize mass transport. A novel four-step numerical simulation method was used to design the system and examine the water evaporation process and mass transport of salts and organics. A case study showed strong interdependence between system parameters and established adaptive water flow rate ranges for efficient organic degradation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Ye-Chuang Han, Shi-Hao Yin, Jun-Rong Zheng, Yuan-Fei Hu, Li Sun, Li Zhang, Zhong-Qun Tian, Jun Yi
Summary: This study reports a thermal shock annealing method that enables fast and high-quality epitaxial growth of graphene on SiC. The method effectively mitigates structural defects and improves the flatness of graphene on SiC. The study also demonstrates the significant enhancement of surface-enhanced infrared absorption using graphene on SiC.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yu Gu, Shuai Tang, Jun Yi, Si-Heng Luo, Chao-Yu Li, Guokun Liu, Jiawei Yan, Jian-Feng Li, Bing-Wei Mao, Zhong-Qun Tian
Summary: The physicochemical properties of the solid-electrolyte interphase (SEI) at anodes of lithium-based batteries are crucial. Nanostructure-based plasmon-enhanced Raman spectroscopy (PERS) techniques have offered significant opportunities for nondestructive and real-time studies of SEI. This Perspective highlights the recent progress in PERS and discusses its advantages and limitations for characterizing SEI and related interfacial processes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Cheng Gong, Peiyao Zhang, Tenzin Norden, Quanwei Li, Zhen Guo, Apoorva Chaturvedi, Arman Najafi, Shoufeng Lan, Xiaoze Liu, Yuan Wang, Shi-Jing Gong, Hao Zeng, Hua Zhang, Athos Petrou, Xiang Zhang
Summary: The isolation of graphene has sparked interest in two-dimensional materials, and recently, ferromagnetism has been observed in several. Gong et al. have found a ferromagnetic state at the interface of antiferromagnetic FePS3 and non-magnetic WS2, providing an alternative approach to achieve two-dimensional ferromagnetism.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Jun-Rong Zheng, En-Ming You, Yuan-Fei Hu, Jun Yi, Zhong-Qun Tian
Summary: Hot carriers injected into semiconductor enable below-bandgap photodetection, and the performance of hot carrier-based devices is related to the absorptivity of metal. Strategies such as surface plasmons, metamaterials, and optical cavities are used to enhance metal absorption, but narrow resonance bandwidth limits detection range. In this study, a purely planar hot-hole photodetector based on ultrathin gold film, an impedance-matched absorber, is designed. The device achieves high photoresponsivity and wide detection range, setting a new record for hot carrier photodetectors.
Article
Multidisciplinary Sciences
Chao Zhan, Jun Yi, Shu Hu, Xia-Guang Zhang, De-Yin Wu, Zhong-Qun Tian
Summary: Plasmon-mediated chemical reactions (PMCRs) utilize nanostructure-based surface plasmons to drive chemical reactions. This review outlines the primary considerations and techniques for designing and constructing plasmonic catalysts, as well as the typical methods used to characterize these catalysts and their reaction mechanisms.
NATURE REVIEWS METHODS PRIMERS
(2023)