Applied Physics Letters最新文献_第7页

Coupling light into a guided Bloch surface wave using an inversely designed nanophotonic cavity 利用反向设计的纳米光子腔将光耦合到导波布洛赫表面波中

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0232450

Zongyuan Tang, Tian-Long Guo, Yannick Augenstein, Adriano Troia, Yanjun Liu, Matthieu Roussey, Carsten Rockstuhl, Emiliano Descrovi

{"title":"Coupling light into a guided Bloch surface wave using an inversely designed nanophotonic cavity","authors":"Zongyuan Tang, Tian-Long Guo, Yannick Augenstein, Adriano Troia, Yanjun Liu, Matthieu Roussey, Carsten Rockstuhl, Emiliano Descrovi","doi":"10.1063/5.0232450","DOIUrl":"https://doi.org/10.1063/5.0232450","url":null,"abstract":"Controlling the propagation of light in the form of surface modes on miniaturized platforms is crucial for multiple applications. For dielectric multilayers that sustain Bloch surface waves at their interface to an isotropic dielectric medium, a conventional approach to manipulate them exploits shallow surface topographies fabricated on top of the truncated stack. However, such structures typically exhibit low index contrasts, making it challenging to confine, steer, and guide the Bloch surface waves. Here, we theoretically and experimentally demonstrate a device for a Bloch surface wave platform that resonantly couples light from a cavity to a straight waveguide. The structure is designed using topology optimization in a 2D geometry under the effective index approximation. In particular, the cavity–waveguide coupling efficiency of the radiation emitted by an individual source in the cavity center is optimized. The cavity is experimentally found to exhibit a narrow resonant peak that can be tuned by scaling the structure. The waveguide is shown to guide only light that resonates in the cavity. Fully three-dimensional simulations of the entire device validate the experimental observations.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Estimation of the friction coefficient by identifying the evolution of rough surface topography 通过识别粗糙表面地形的演变估算摩擦系数

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0230431

Dafei Huang, Wurui Ta, Youhe Zhou

引用次数: 0

Atomistic first-principles modeling of single donor spin-qubit 单供体自旋量子比特的原子第一原理建模

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0221229

Songqi Jia, Félix Beaudoin, Pericles Philippopoulos, Hong Guo

{"title":"Atomistic first-principles modeling of single donor spin-qubit","authors":"Songqi Jia, Félix Beaudoin, Pericles Philippopoulos, Hong Guo","doi":"10.1063/5.0221229","DOIUrl":"https://doi.org/10.1063/5.0221229","url":null,"abstract":"Using an impurity atom in crystal silicon as a spin-1/2 qubit has been made experimentally possible recently where the impurity atom acts as a quantum dot (QD). Quantum transport in and out of such a donor QD occurs in the sequential tunneling regime where a physical quantity of importance is the charging (addition) energy, which measures the energy necessary for adding an electron into the donor QD. In this work, we present a first-principles method to quantitatively predict the addition energy of the donor QD. Using density functional theory (DFT), we determine the impurity states that serve as the basis set for subsequent exact diagonalization calculation of the many-body states and energies of the donor QD. Due to the large effective Bohr radius of the conduction electrons in Si, very large supercells containing more than 10 000 atoms must be used to obtain accurate results. For the donor QD of a phosphorus impurity in bulk Si, the combined DFT and exact diagonalization predicts the first addition energy to be 53 meV, in good agreement with the corresponding experimental value. For the donor QD of an arsenic impurity in Si, the first addition energy is predicted to be 44.2 meV. The calculated many-body wave functions provide a vivid electronic picture of the donor QD.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced detection performance based on a differential ME sensor with strong suppression of vibration interference 基于能有效抑制振动干扰的差分 ME 传感器的更高探测性能

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0232400

Zhaoqiang Chu, Yanpan Wang, Zelin Du, Jianyu Cui, Zhonghui Yu

{"title":"Enhanced detection performance based on a differential ME sensor with strong suppression of vibration interference","authors":"Zhaoqiang Chu, Yanpan Wang, Zelin Du, Jianyu Cui, Zhonghui Yu","doi":"10.1063/5.0232400","DOIUrl":"https://doi.org/10.1063/5.0232400","url":null,"abstract":"Magnetoelectric (ME) sensors have enormous potential for detecting weak magnetic fields because of their high sensitivity, low power consumption, compact size and, low cost. However, inevitable vibration interference limits their application in practical environments, especially in the case of mobile platform mounting. Here, we propose a differential ME sensor, consisting of PZT macro-fiber composites (MFCs) and Metglas laminates. The differential ME sensor has two output terminals with weak mutual mechanical coupling and works in longitudinal vibration mode. MFC cores are polarized in parallel mode to guarantee their consistency of electric characteristics and reversed bias field is provided by attached magnets. Experimental results show that the differential-mode response amplitudes have a gain of −17.6 dB for low-frequency vibration at 2 Hz and ∼6.2 dB for an applied magnetic field at 3 Hz, in comparison with the single-ended mode. In addition, our proposed ME sensor also has a low inherent equivalent magnetic noise of 18.3 pT/√Hz at 1 Hz. Finally, a target detection experiment in the presence of heavy lab noise and strong vibration interference is conducted and the improved detection performance of the proposed differential ME sensor is proved.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance enhancement of solution-processed organic thin-film transistors incorporating an improved Corbino structure 采用改进型 Corbino 结构的溶液处理有机薄膜晶体管的性能提升

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0229623

Anuj Rajpoot, Soumya Dutta

{"title":"Performance enhancement of solution-processed organic thin-film transistors incorporating an improved Corbino structure","authors":"Anuj Rajpoot, Soumya Dutta","doi":"10.1063/5.0229623","DOIUrl":"https://doi.org/10.1063/5.0229623","url":null,"abstract":"The solution-processed organic thin-film transistors (OTFTs) with a minimal device footprint and improved performance are desirable for flexible electronics and other circuit applications. It is demonstrated that the enhanced performance can be achieved for solution-processed OTFTs by adopting an improved Corbino structure. The bottom-gate bottom-contact OTFTs of W/L ratio of 500 are fabricated using the standard poly-3-hexylthiophene (P3HT) as a semiconductor with an improved interdigitated pseudo-Corbino (IPC) structure. The exhibited IPC structure is a combination of interdigitated structure in the enclosed-Corbino design to achieve infinite output resistance, suppressed parasitic leakage current, and high ON current by accommodating a high W/L ratio in a minimal device footprint. For the fabricated solution-processed OTFTs, infinite output resistance with an OFF-current of the order of 10−12 A and an ON/OFF ratio of drain current of the order of 107 is achieved. Incorporating an enhanced hexamethyldisilazane treatment of the SiO2 gate dielectric improves the ON/OFF ratio to a record value of 108 and the mobility of the order of 10−2 cm2/Vs for P3HT. Implementation of IPC-TFT structure for intentionally chosen moderate-mobility, solution-processed P3HT semiconductor results in a consistent low OFF-current, high ON/OFF ratio, and infinite output resistance with excellent device-to-device uniformity.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micromagnetic study of the dynamics of toron chains 环链动力学的微磁研究

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0216480

E. Saavedra, R. M. Corona, S. Castillo-Sepúlveda, D. Laroze, D. Altbir, V. L. Carvalho-Santos

引用次数: 0

Scanning tunneling microscopy of ultrathin indium intercalated between graphene and SiC using confinement heteroepitaxy 利用约束异质外延技术对石墨烯和碳化硅之间插层的超薄铟进行扫描隧道显微镜观察

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0223972

Van Dong Pham, César González, Yannick J. Dappe, Chengye Dong, Joshua A. Robinson, Achim Trampert, Roman Engel-Herbert

{"title":"Scanning tunneling microscopy of ultrathin indium intercalated between graphene and SiC using confinement heteroepitaxy","authors":"Van Dong Pham, César González, Yannick J. Dappe, Chengye Dong, Joshua A. Robinson, Achim Trampert, Roman Engel-Herbert","doi":"10.1063/5.0223972","DOIUrl":"https://doi.org/10.1063/5.0223972","url":null,"abstract":"Large-scale and air-stable two-dimensional metal layers intercalated at the interface between epitaxial graphene and SiC offer an appealing material for quantum technology. The atomic and electronic details, as well as the control of the intercalated metals within the interface, however, remain very limited. In this Letter, we explored ultrathin indium confined between graphene and SiC using cryogenic scanning tunneling microscopy, complemented by first-principle density functional theory. Bias-dependent imaging and tunneling spectroscopy visualize a triangular superstructure with a periodicity of 14.7 ± 3 Å and an occupied state at about −1.6 eV, indicating proof of highly crystalline indium. The scanning tunneling microscopy tip was used to manipulate the number of indium layers below graphene, allowing to identify three monatomic In layers and to tune their corresponding electronic properties with atomic precision. This further allows us to attribute the observed triangular superstructure to be solely emerging from the In trilayer, tentatively explained by the lattice mismatch induced by lattice relaxation in the topmost In layer. Our findings provide a microscopic insight into the structure and electronic properties of intercalated metals within the graphene/SiC interface and a unique possibility to manipulate them with atomic precision using the scanning probe technique.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Manipulating formation of different InGaAs/GaAs nanostructures via tailoring As4 flux 通过调整 As4 通量操纵不同 InGaAs/GaAs 纳米结构的形成

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0235044

Wen Zhang, Ying Wang, Yingnan Guo, Wenquan Ma, Jihoon Lee, Yuriy I. Mazur, Morgan E. Ware, Gregory J. Salamo, Baolai Liang

引用次数: 0

Inverse design of polaritonic devices 极性器件的逆向设计

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0229810

Oliver Kuster, Yannick Augenstein, Carsten Rockstuhl, Thomas Jebb Sturges

{"title":"Inverse design of polaritonic devices","authors":"Oliver Kuster, Yannick Augenstein, Carsten Rockstuhl, Thomas Jebb Sturges","doi":"10.1063/5.0229810","DOIUrl":"https://doi.org/10.1063/5.0229810","url":null,"abstract":"Polaritons, arising from the strong coupling between excitons and photons within microcavities, hold promise for optoelectronic and all-optical devices. They have found applications in various domains, including low-threshold lasers and quantum information processing. To realize complex functionalities, non-intuitive designs for polaritonic devices are required. In this contribution, we use finite-difference time-domain simulations of the dissipative Gross–Pitaevskii equation, written in a differentiable manner, and combine it with an adjoint formulation. Such a method allows us to use topology optimization to engineer the potential landscape experienced by polariton condensates to tailor its characteristics on demand. The potential directly translates to a blueprint for a functional device, and various fabrication and optical control techniques can experimentally realize it. We inverse-design a selection of polaritonic devices, i.e., a structure that spatially shapes the polaritons into a flat-top distribution, a metalens that focuses a polariton, and a nonlinearly activated isolator. The functionalities are preserved when employing realistic fabrication constraints such as minimum feature size and discretization of the potential. Our results demonstrate the utility of inverse design techniques for polaritonic devices, providing a stepping stone toward future research in optimizing systems with complex light–matter interactions.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High Q transparency, strong third harmonic generation, and giant nonlinear chirality driven by toroidal dipole-quasi-BIC 环状偶极子-准 BIC 驱动的高 Q 值透明度、强三次谐波生成和巨非线性手性

IF 4 2区物理与天体物理

Applied Physics Letters Pub Date : 2024-10-28 DOI: 10.1063/5.0237217

Yang Cheng, Shijie Cai, Junjie Li, Hanyang Gong, Zhengqi Liu, Jing Chen, Guolan Fu, Xiaoshan Liu, Pingping Pan, Guiqiang Liu

{"title":"High Q transparency, strong third harmonic generation, and giant nonlinear chirality driven by toroidal dipole-quasi-BIC","authors":"Yang Cheng, Shijie Cai, Junjie Li, Hanyang Gong, Zhengqi Liu, Jing Chen, Guolan Fu, Xiaoshan Liu, Pingping Pan, Guiqiang Liu","doi":"10.1063/5.0237217","DOIUrl":"https://doi.org/10.1063/5.0237217","url":null,"abstract":"Electromagnetically induced transparency (EIT), nonlinearity, and optical chirality hold significant applications in many areas such as optical switches, slow-light devices, chiral harmonic conversion, and optical storage. In this work, we theoretically propose an asymmetric all-dielectric metasurface supporting toroidal dipole-quasi-bound states in the continuum (TD-q-BICs). High quality (Q) EIT, strong third harmonic generation (THG), and giant nonlinear chirality are achieved via the extremely enhanced electric field energy localized in the Si plate by the TD-q-BIC. A huge transition from high Q EIT with transmission of ∼0.99 to strong chirality with circular dichroism (CD) of ∼0.9 is realized by tuning the angle and polarization state of incident light. Strong THG with efficiency of 4.5 × 10−3 under linear polarization light is due to the highly localized electric field supported by the TD-q-BIC and perfect nonlinear CD chirality with theoretically value of ∼1 originates from the large discrepancy in electric field distributions under different circularly polarized light. Our work provides an innovative paradigm to construct TD-q-BICs-governed EIT analogs, THG, and nonlinear chirality for the development of multifunction nanophotonic meta-devices.","PeriodicalId":8094,"journal":{"name":"Applied Physics Letters","volume":null,"pages":null},"PeriodicalIF":4.0,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142536688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0