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| 1 | Optical tuning of exciton and trion emissions in monolayer phosphorene显示文摘Monolayer phosphorene provides a unique two-dimensional(2D)platform to investigate the fundamental dynamics of excitons and trions(charged excitons)in reduced dimensions.However,owing to its high instability,unambiguous identification of monolayer phosphorene has been elusive.Consequently,many important fundamental properties,such as exciton dynamics,remain underexplored.We report a rapid,noninvasive,and highly accurate approach based on optical interferometry to determine the layer number of phosphorene,and confirm the results with reliable photoluminescence measurements.Furthermore,we successfully probed the dynamics of excitons and trions in monolayer phosphorene by controlling the photo-carrier injection in a relatively low excitation power range.Based on our measured optical gap and the previously measured electronic energy gap,we determined the exciton binding energy to be~0.3 eV for the monolayer phosphorene on SiO_(2)/Si substrate,which agrees well with theoretical predictions.A huge trion binding energy of~100 meV was first observed in monolayer phosphorene,which is around five times higher than that in transition metal dichalcogenide(TMD)monolayer semiconductor,such as MoS_(2).The carrier lifetime of exciton emission in monolayer phosphorene was measured to be,220 ps,which is comparable to those in other 2D TMD semiconductors.Our results open new avenues for exploring fundamental phenomena and novel optoelectronic applications using monolayer phosphorene. | Jiong Yang Renjing Xu Jiajie Pei Ye Win Myint Fan Wang Zhu Wang Shuang Zhang Zongfu Yu Yuerui Lu | 2015 | Light(Science & Applications)2015，4，1： | 8 |
| 2 | Enhanced second-harmonic generation from two-dimensional MoSe_(2) on a silicon waveguide显示文摘Two-dimensional transition-metal dichalcogenides(TMDCs)with intrinsically broken crystal inversion symmetry and large secondorder nonlinear responses have shown great promise for future nonlinear light sources.However,the sub-nanometer monolayer thickness of such materials limits the length of their nonlinear interaction with light.Here,we experimentally demonstrate the enhancement of the second-harmonic generation from monolayer MoSe_(2) by its integration onto a 220-nm-thick silicon waveguide.Such on-chip integration allows for a marked increase in the interaction length between the MoSe_(2) and the waveguide mode,further enabling phase matching of the nonlinear process.The demonstrated TMDC–silicon photonic hybrid integration opens the door to second-order nonlinear effects within the silicon photonic platform,including efficient frequency conversion,parametric amplification and the generation of entangled photon pairs. | Haitao Chen Vincent Corboliou Alexander S Solntsev Duk-Yong Choi Maria A Vincenti Domenico de Ceglia Costantino de Angelis Yuerui Lu Dragomir N Neshev | 2017 | Light(Science & Applications)2017，6，1： | 7 |
| 3 | 2D organic semiconductors, the future of green nanotechnology显示文摘The discovery of 2D organic semiconductors of atomically thin structures has attracted great attention due to their emerging optical, electronic, optoelectronic and mechatronic properties. Recent progress in such organic nanostructures has opened new opportunities for engineering material properties in many ways, such as, 0D/1D/2D nanoparticles hybridization, strain engineering, atomic doping etc. Moreover, 2D organic nanostructures exhibit a unique feature of bio–functionality and are highly sensitive to bio-analytes. Such peculiar behavior in 2D organics can be utilized to design highly-efficient bio-sensors. Also, a bio-molecular integrated electronic/optoelectronic device with enhanced performance can be attained. Furthermore, the bio-degradable, biocompatible, biometabolizable, non-toxic behaviour and natural origin of organic nanomaterials can address the current ecological concerns of increasing inorganic material based electronic waste. This review highlights the benefits of 2D organic semiconductors. Considering the importance of strategic techniques for growing thin 2D organic layers,this review summarizes progress towards this direction. The possible challenges for long-time stability and future research directions in 2D organic nano electronics/optoelectronics are also discussed. We believe that this review article provides immense research interests in organic 2D nanotechnology for exploiting green technologies in the future. | Guru Prakash Neupane Wendi Ma Tanju Yildirim Yilin Tang Linglong Zhang Yuerui Lu | 2019 | Nano Materials Science2019，1，4： | 3 |
| 4 | Two-dimensional materials for light emitting applications:Achievement,challenge and future perspectives显示文摘The two-dimensional(2D)materials have been widely developed recently in material characteristics with advanced optical and electrical properties,and they have been extensively studied as candidates for the next generation of optoelectronic devices.This review will mainly focus on the preparation methods and the light emitting applications of 2D transition metal dichalcogenides(TMDs),2D black phosphorene(BP)and 2D perovskites.The review will first introduce the preparation methods for TMDs and BP.Due to the variations of band structure,exciton binding energies and light-matter interaction in TMDs and BP,the different light emitting devices(LEDs)designs based on TMDs and BP will be discussed and summarized.Then the review will turn the focus to 2D perovskites,starting with a description of the preparation methods for the different structural perovskites.In order to review and summarize the achievements of 2D perovskites-based LEDs,the high efficiency perovskites LEDs are discussed.Finally,the review will present challenges,opportunities,and outlook for the future development of 2D materials-based light emitting applications. | Yi Zhu Xueqian Sun Yilin Tang Lan Fu Yuerui Lu | 2021 | Nano Research2021，14，6： | 2 |
| 5 | Anisotropic polaritons in van der Waals materials显示文摘Polaritons in two-dimensional(2D)materials continues to garner significant attention due to their favorable ability of field-confinement and intriguing potential for low-loss and ultrafast optical and photonic devices.The recent experimental observation of in-plane anisotropic dispersion in natural van der Waals materials has revealed much richer physics as compared to isotropic plasmonic materials,which provides new insight to manipulate the polaritons and manufacture flat optical devices with unprecedented controls.Herein,we give an overview of the recent progress in in-plane anisotropic polaritons launched and visualized in the near-field range in 2D layered van der Waals materials.Furthermore,future prospects in this promising but emerging field are featured on the basis of its peculiar applications.This review article will stimulate the scientific community to explore other hyperbolic materials and structures in order to develop optical technologies with novel functionalities and further improve the understanding of the exotic photonic phenomena. | Weiliang Ma Babar Shabbir Qingdong Ou Yemin Dong Huanyang Chen Peining Li Xinliang Zhang Yuerui Lu Qiaoliang Bao | 2020 | InfoMat2020，2，5： | 2 |
| 6 | High-speed multiwavelength InGaAs/InP quantum well nanowire array micro-LEDs for next generation optical communications显示文摘Miniaturized light sources at telecommunication wavelengths are essential components for on-chip optical communication systems.Here,we report the growth and fabrication of highly uniform p-i-n core-shell InGaAs/InP single quantum well(QW)nanowire array light emitting diodes(LEDs)with multi-wavelength and high-speed operations.Two-dimensional cathodoluminescence mapping reveals that axial and radial QWs in the nanowire structure contribute to strong emission at the wavelength of~1.35 and~1.55μm,respectively,ideal for low-loss optical communications.As a result of simultaneous contributions from both axial and radial QWs,broadband electroluminescence emission with a linewidth of 286 nm is achieved with a peak power of~17μW.A large spectral blueshift is observed with the increase of applied bias,which is ascribed to the band-filling effect based on device simulation,and enables voltage tunable multi-wavelength operation at the telecommunication wavelength range.Multi-wavelength operation is also achieved by fabricating nanowire array LEDs with different pitch sizes on the same substrate,leading to QW formation with different emission wavelengths.Furthermore,high-speed GHz-level modulation and small pixel size LED are demonstrated,showing the promise for ultrafast operation and ultracompact integration.The voltage and pitch size controlled multi-wavelength highspeed nanowire array LED presents a compact and efficient scheme for developing high-performance nanoscale light sources for future optical communication applications. | Fanlu Zhang Zhicheng Su Zhe Li Yi Zhu Nikita Gagrani Ziyuan Li Mark Lockrey Li Li Igor Aharonovich Yuerui Lu Hark Hoe Tan Chennupati Jagadish Lan Fu | 2023 | Opto-Electronic Science2023，2，5： | 1 |
| 7 | Supertransport of excitons in atomically thin organic semiconductors at the 2D quantum limit显示文摘Long-range and fast transport of coherent excitons is important for the development of high-speed excitonic circuits and quantum computing applications.However,most of these coherent excitons have only been observed in some low-dimensional semiconductors when coupled with cavities,as there are large inhomogeneous broadening and dephasing effects on the transport of excitons in their native states in materials.Here,by confining coherent excitons at the 2D quantum limit,we first observed molecular aggregation-enabled‘supertransport’of excitons in atomically thin two-dimensional(2D)organic semiconductors between coherent states,with a measured high effective exciton diffusion coefficient of ~346.9 cm^(2)/s at room temperature.This value is one to several orders of magnitude higher than the values reported for other organic molecular aggregates and low-dimensional inorganic materials.Without coupling to any optical cavities,the monolayer pentacene sample,a very clean 2D quantum system(~1.2 nm thick)with high crystallinity(J-type aggregation)and minimal interfacial states,showed superradiant emission from Frenkel excitons,which was experimentally confirmed by the temperature-dependent photoluminescence(PL)emission,highly enhanced radiative decay rate,significantly narrowed PL peak width and strongly directional in-plane emission.The coherence in monolayer pentacene samples was observed to be delocalised over~135 molecules,which is significantly larger than the values(a few molecules)observed for other organic thin films.In addition,the supertransport of excitons in monolayer pentacene samples showed highly anisotropic behaviour.Our results pave the way for the development of future high-speed excitonic circuits,fast OLEDs,and other optoelectronic devices. | Ankur Sharma Linglong Zhang Jonathan O.Tollerud Miheng Dong Yi Zhu Robert Halbich Tobias Vogl Kun Liang Hieu T.Nguyen Fan Wang Shilpa Sanwlani Stuart K.Earl Daniel Macdonald Ping Koy Lam Jeffrey A.Davis Yuerui Lu | 2020 | Light(Science & Applications)2020，9，1： | 1 |
| 8 | High-efficiency ordered silicon nano-conieal-frustum array solar ceils by self-powered parallel e- lectron Lithography显示文摘 | LU Yuerui LMIT A | 2010 | Nano Lett2010，10，： | 1 |
| 9 | Atomically thin optical lenses and gratings显示文摘Two-dimensional(2D)materials have emerged as promising candidates for miniaturized optoelectronic devices due to their strong inelastic interactions with light.On the other hand,a miniaturized optical system also requires strong elastic light–matter interactions to control the flow of light.Here we report that a single-layer molybdenum disulfide(MoS2)has a giant optical path length(OPL),around one order of magnitude larger than that from a single-layer of graphene.Using such giant OPL to engineer the phase front of optical beams we have demonstrated,to the best of our knowledge,the world’s thinnest optical lens consisting of a few layers of MoS2 less than 6.3 nm thick.By taking advantage of the giant elastic scattering efficiency in ultra-thin high-index 2D materials,we also demonstrated high-efficiency gratings based on a single-or few-layers of MoS2.The capability of manipulating the flow of light in 2D materials opens an exciting avenue towards unprecedented miniaturization of optical components and the integration of advanced optical functionalities.More importantly,the unique and large tunability of the refractive index by electric field in layered MoS2 will enable various applications in electrically tunable atomically thin optical components,such as micro-lenses with electrically tunable focal lengths,electrical tunable phase shifters with ultra-high accuracy,which cannot be realized by conventional bulk solids. | Jiong Yang Zhu Wang Fan Wang Renjing Xu Jin Tao Shuang Zhang Qinghua Qin Barry Luther-Davies Chennupati Jagadish Zongfu Yu Yuerui Lu | 2016 | Light(Science & Applications)2016，5，1： | 1 |
| 10 | A prospective future towards bio/medical technology and bioelectronics based on 2D vdWs heterostructures显示文摘Nano-biotechnology research has become extremely important due to the possibilities in manipulation and characterization of biological molecules through nanodevices.Nanomaterials exhibit exciting electrical,optoelectronic,magnetic,mechanical and chemical properties that can be exploited to develop efficient biosensors or bio-probes.Those unique properties in nanomaterials can also be used in bioimaging and cancer therapeutics,where biomolecules influence the inherent properties in nanomaterials.Effective manipulation of nanomaterial properties can lead to many breakthroughs in nanotechnology applications.Nowadays,2D nanomaterials have emerged as viable materials for nanotechnology.Large cross-section area and functional availability of 2D or 1D quantum limit in these nanomaterials allow greater flexibility and better nanodevice performance.2D nanomaterials enable advanced bioelectronics to be more easily integrated due to their atomic thickness,biocompatibility,mechanical flexibility and conformity.Furthermore,with the development of 2D material heterostructures,enhanced material properties can be obtained which can directly influence bio-nanotechnology applications.This article firstly reviews the development of various types of 2D heterostructures in a wide variety of nano-biotechnology applications.Furthermore,future 2D heterostructure scopes in bioimaging,nanomedicine,bio-markers/therapy and bioelectronics are discussed.This paper can be an avenue for providing a wide scope for 2D van der Waals(vdWs)heterostructures in bio-and medical fields. | Guru Prakash Neupane Linglong Zhang Tanju Yildirim Kai Zhou Bowen Wang Yilin Tang Wendi Ma Yunzhou Xue Yuerui Lu | 2020 | Nano Research2020，13，1： | 1 |
| 11 | 12英寸二维半导体批量生产:填补实验室与加工厂之间沟渠显示文摘Two-dimensional(2D)van der Waals materials stand out as a family of atomic-thickness crystals with fascinating properties that span electronics,optoelectronics,photonics,acoustics,and beyond.As supplementary to zero-band graphene,limited-gap MXenes[1,2]and insulator hBN,2D transition metal dichalcogenides(TMDs),which are free of dangling bonds and possess a sizeable bandgap,inherently restrict the carrier pathway in atomically thin channels and are immune to short-channel effects naturally.Their excellent electrical performance within extreme thickness positions them as promising candidates for the next-generation semi-conductor material in the post-Moore era[3-7]. | Yuerui Lu | 2023 | Science Bulletin2023，68，20： | 0 |
| 12 | Exciton dynamics in 2D organic semiconductors显示文摘Two-dimensional(2D)semiconducting materials have been studied extensively for their interesting excitonic and optoelectronic properties arising from strong many-body interactions and quantum confinement at 2D limit.Most of these materials have been inorganic,such as transition metal dichalcogenides,phosphorene,etc.Organic semiconductor materials,on the other hand been investigated for their excellent electrical conductivity and low dielectric coefficients for similar applications in the thin film or bulk material phase.The lack of crystallinity in the thin film and bulk phases has led to ambiguity over the excitonic and electronic/optical band gap characteristics.The recent emergence of 2D organic materials has opened a new domain of high crystallinity and controlled morphology,allowing for the study of low-lying excitonic states and optoelectronic properties.They have been demonstrated to have different excitonic properties compared with the Wannier–Mott excitons in inorganic 2D materials.Here we present our recent experimental observations and analysis of 2D organic semiconductor materials.We discuss the role of high-crystalline and morphology-controlled growth of single-crystalline materials and their optoelectronic properties.The report explains the Frenkel(FR)and charge-transfer(CT)excitons and subsequent light emission and absorption properties in organic materials.The true nature of low-lying excitonic states,which arises from the interaction between CT and FR excitons,is experimentally studied and discussed to reveal the electronic band structure.We then discuss the pure FR behaviour we observed in J–type aggregated organic materials leading to coherent superradiant excitonic emissions.The supertransport of excitons within the organic materials,facilitated by their pure FR nature,and the delocalization of excitons over a large number of molecules are also demonstrated.Finally,we discuss the applications and our vision for these organic 2D materials in fast organic light-emitting diodes,high-speed excitonic circuits,quantum computing devices,and other optoelectronic devices. | Ankur Sharma Md Mehedi Hasan Yuerui Lu | 2022 | Materials Futures2022，1，4： | 0 |
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