Sensing Technologies + Applications最新文献

Coherent phenomena in terahertz 2D plasmonic structures: strong coupling, plasmonic crystals, and induced transparency by coupling of localized modes 太赫兹二维等离子体结构中的相干现象:强耦合、等离子体晶体和局域模式耦合诱导的透明

Sensing Technologies + Applications Pub Date : 2016-05-10 DOI: 10.1117/12.2053629

G. Dyer, G. Aizin, S. J. Allen, A. Grine, D. Bethke, J. L. Reno, E. Shaner

{"title":"Coherent phenomena in terahertz 2D plasmonic structures: strong coupling, plasmonic crystals, and induced transparency by coupling of localized modes","authors":"G. Dyer, G. Aizin, S. J. Allen, A. Grine, D. Bethke, J. L. Reno, E. Shaner","doi":"10.1117/12.2053629","DOIUrl":"https://doi.org/10.1117/12.2053629","url":null,"abstract":"The device applications of plasmonic systems such as graphene and two dimensional electron gases (2DEGs) in III-V heterostructures include terahertz detectors, mixers, oscillators and modulators. These two dimensional (2D) plasmonic systems are not only well-suited for device integration, but also enable the broad tunability of underdamped plasma excitations via an applied electric field. We present demonstrations of the coherent coupling of multiple voltage tuned GaAs/AlGaAs 2D plasmonic resonators under terahertz irradiation. By utilizing a plasmonic homodyne mixing mechanism to downconvert the near field of plasma waves to a DC signal, we directly detect the spectrum of coupled plasmonic micro-resonator structures at cryogenic temperatures. The 2DEG in the studied devices can be interpreted as a plasmonic waveguide where multiple gate terminals control the 2DEG kinetic inductance. When the gate tuning of the 2DEG is spatially periodic, a one-dimensional finite plasmonic crystal forms. This results in a subwavelength structure, much like a metamaterial element, that nonetheless Bragg scatters plasma waves from a repeated crystal unit cell. A 50% in situ tuning of the plasmonic crystal band edges is observed. By introducing gate-controlled defects or simply terminating the lattice, localized states arise in the plasmonic crystal. Inherent asymmetries at the finite crystal boundaries produce an induced transparency-like phenomenon due to the coupling of defect modes and crystal surface states known as Tamm states. The demonstrated active control of coupled plasmonic resonators opens previously unexplored avenues for sensitive direct and heterodyne THz detection, planar metamaterials, and slow-light devices.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134299180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Superdense teleportation for space applications 用于空间应用的超密集隐形传态

Sensing Technologies + Applications Pub Date : 2015-06-10 DOI: 10.1117/12.2050978

T. Graham, H. Bernstein, H. Javadi, B. Geldzahler, P. Kwiat

引用次数: 4

High-resolution, high-frequency wavelength shift detection of optical signals with low-cost, compact readouts 高分辨率，高频波长偏移检测光信号与低成本，紧凑的读数

Sensing Technologies + Applications Pub Date : 2015-06-03 DOI: 10.1117/12.2177478

A. Schuh, A. Hegyi, A. Raghavan, A. Lochbaum, Julian Schwartz, P. Kiesel

引用次数: 3

New design for a wavelength demultiplexing device 波长解复用装置的新设计

Sensing Technologies + Applications Pub Date : 2015-06-03 DOI: 10.1117/12.2183328

Konrad Bethmann, R. Orghici, E. Pichler, U. Zywietz, Thomas Schimdt, U. Gleißner, Christian Kelb, B. Roth, C. Reinhardt, U. Willer, W. Schade

引用次数: 1

Measurements of UV-A radiation and hazard limits from some types of outdoor lamps 某些类型户外灯的紫外线辐射和危害限值的测量

Sensing Technologies + Applications Pub Date : 2015-06-03 DOI: 10.1117/12.2181065

E. El-Moghazy, A. Abd-Elmageed, S. Reda

引用次数: 3

In-situ monitoring of drug release from therapeutic eluting polyelectrolyte multilayers under static and dynamic conditions 静态和动态条件下治疗性洗脱聚电解质多层膜药物释放的原位监测

Sensing Technologies + Applications Pub Date : 2015-06-01 DOI: 10.1117/12.2191683

F. Tian, Jouha Min, J. Kanka, P. Hammond, H. Du

{"title":"In-situ monitoring of drug release from therapeutic eluting polyelectrolyte multilayers under static and dynamic conditions","authors":"F. Tian, Jouha Min, J. Kanka, P. Hammond, H. Du","doi":"10.1117/12.2191683","DOIUrl":"https://doi.org/10.1117/12.2191683","url":null,"abstract":"The release profiles of gentamicin sulfate (GS) from [chitosan (CHI)/poly(acrylic acid) (PAA)/GS/PAA]n polyelectrolyte multilayers were investigated in situ using an innovative lab-on-fiber (LOF) optofluidic platform that mimics physiologically relevant fluid flow in a microenvironment. The LOF was constructed by enclosing in a flow-enabled and optically coupled glass capillary a long-period fiber grating both as a substrate for LbL growth of [CHI/PAA/GS/PAA]n and a measurement probe for GS release. We show that the LOF is very robust in monitoring the construction of the [CHI/PAA/GS/PAA]n multilayers at monolayer resolution as well as evaluating the rate of GS release with high sensitivity. The release processes in the LOF under static and a range of dynamic conditions are evaluated, showing a faster release under dynamic condition than that under static condition due to the varying circumstance of GS concentration gradient and the effect of flow-induced shear at the medium-multilayer interface. The LOF platform has the potential to be a powerful test bed to facilitate the design and evaluation of drug-eluting polyelectrolyte thin films for their clinical insertion as part of patient care strategy.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125455303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

An optical receiver for the Lunar Laser Communication Demonstration based on photon-counting superconducting nanowires 基于光子计数超导纳米线的月球激光通信演示光学接收器

Sensing Technologies + Applications Pub Date : 2015-05-28 DOI: 10.1117/12.2179781

M. Grein, A. Kerman, E. Dauler, M. M. Willis, B. Romkey, R. Molnar, B. Robinson, D. V. Murphy, D. Boroson

引用次数: 43

Possibility of the detection and identification of substance at long distance using the noisy reflected THz pulse under real conditions 在实际条件下利用噪声反射太赫兹脉冲进行远距离物质探测和识别的可能性

Sensing Technologies + Applications Pub Date : 2015-05-21 DOI: 10.1117/12.2177991

V. Trofimov, S. A. Varentsova, V. Trofimov

{"title":"Possibility of the detection and identification of substance at long distance using the noisy reflected THz pulse under real conditions","authors":"V. Trofimov, S. A. Varentsova, V. Trofimov","doi":"10.1117/12.2177991","DOIUrl":"https://doi.org/10.1117/12.2177991","url":null,"abstract":"We show possibility of the detection and identification of substance at long distance (several metres, for example) using the THz pulse reflected from the object under the real conditions: at room temperature and humidity of about 70%. The main feature of this report consists in a demonstration of the detection and identification of substance using the computer processing of the noisy THz pulse. Amplitude of the useful signal is less than the amplitude of a noise. Nevertheless, it is possible to detect “fingerprint” frequencies of substance if these frequencies are known and the SDA method is used together with new assessments for probability estimation for presence of detected frequencies. Essential restrictions of the commonly used THz TDS method for the detection and identification under real conditions (at long distance about 3.5 m and at a high relative humidity more than 50%) are demonstrated using the physical experiment with chocolate bar and thick paper bag. We show also that the THz TDS method detects spectral features of dangerous substances even in the THz signals measured in laboratory conditions (at distance 30-40 cm from the receiver and at a low relative humidity less than 2%); the n-Si and p-Si semiconductors were used as neutral substances. However, the integral correlation and likeness criteria, based on SDA method, allow us to detect the absence of dangerous substances in the samples. Current results show feasibility of using the discussed method of the THz pulsed spectroscopy for the counter-terrorism problem.","PeriodicalId":438348,"journal":{"name":"Sensing Technologies + Applications","volume":"9483 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129987130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Remote characterization of biological specimens using all-optical frequency-domain photoacoustic microscopy 使用全光频域光声显微镜对生物标本进行远程表征

Sensing Technologies + Applications Pub Date : 2015-05-21 DOI: 10.1117/12.2177426

A. Sampathkumar

引用次数: 0

Radar system components to detect small and fast objects 雷达系统组件用于探测小而快速的物体

Sensing Technologies + Applications Pub Date : 2015-05-21 DOI: 10.1117/12.2177017

A. Hülsmann, C. Zech, Mathias Klenner, A. Tessmann, A. Leuther, D. Lopez-Diaz, M. Schlechtweg, O. Ambacher

引用次数: 2