Now showing items 1-20 of 1336

    • Polarized evanescent waves reveal trochoidal dichroism 

      McCarthy, Lauren A.; Smith, Kyle W.; Lan, Xiang; Jebeli, Seyyed Ali Hosseini; Bursi, Luca; Alabastri, Alessandro; Chang, Wei-Shun; Nordlander, Peter; Link, Stephan (2020)
      Matter’s sensitivity to light polarization is characterized by linear and circular polarization effects, corresponding to the system’s anisotropy and handedness, respectively. Recent investigations into the near-field ...
    • Giant photothermoelectric effect in silicon nanoribbon photodetectors 

      Dai, Wei; Liu, Weikang; Yang, Jian; Xu, Chao; Alabastri, Alessandro; Liu, Chang; Nordlander, Peter; Guan, Zhiqiang; Xu, Hongxing (2020)
      The photothermoelectric (PTE) effect enables efficient harvesting of the energy of photogenerated hot carriers and is a promising choice for high-efficiency photoelectric energy conversion and photodetection. Recently, the ...
    • Data-driven predictions of a multiscale Lorenz 96 chaotic system using machine-learning methods: reservoir computing, artificial neural network, and long short-term memory network 

      Chattopadhyay, Ashesh; Hassanzadeh, Pedram; Subramanian, Devika (2020)
      In this paper, the performance of three machine-learning methods for predicting short-term evolution and for reproducing the long-term statistics of a multiscale spatiotemporal Lorenz 96 system is examined. The methods are ...
    • Improving the Signal to Noise Ratio of QTF Preamplifiers Dedicated for QEPAS Applications 

      Wieczorek, Piotr Z.; Starecki, Tomasz; Tittel, Frank K. (2020)
      The signal-to-noise ratio (SNR) is a major factor that limits the detection sensitivity of quartz-enhanced photoacoustic spectroscopy (QEPAS) sensors. The higher the electrical signal level compared to the noise amplitude ...
    • A NDIR Mid-Infrared Methane Sensor with a Compact Pentahedron Gas-Cell 

      Ye, Weilin; Tu, Zihan; Xiao, Xupeng; Simeone, Alessandro; Yan, Jingwen; Wu, Tao; Wu, Fupei; Zheng, Chuantao; Tittel, Frank K. (2020)
      In order to improve the performance of the large divergence angle mid-infrared source in gas sensing, this paper aims at developing a methane (CH4) sensor with non-dispersive infrared (NDIR) technology using a compact ...
    • Quartz-enhanced photoacoustic spectroscopy exploiting a fast and wideband electro-mechanical light modulator 

      Zheng, Huadan; Zheng, Huadan; Liu, Yihua; Lin, Haoyang; Kan, Ruifeng; Kan, Ruifeng; Dong, Lei; Dong, Lei; Zhu, Wenguo; Fang, Junbin; Yu, Jianhui; Yu, Jianhui; Tittel, Frank K.; Chen, Zhe (2020)
      A quartz-enhanced photoacoustic spectroscopy (QEPAS) gas sensor exploiting a fast and wideband electro-mechanical light modulator was developed. The modulator was designed based on the electro-mechanical effect of a ...
    • A hyperspectral projector for simultaneous 3D spatial and hyperspectral imaging via structured illumination 

      Xu, Yibo; Giljum, Anthony; Kelly, Kevin F. (2020)
      Both 3D imaging and hyperspectral imaging provide important information of the scene and combining them is beneficial in helping us perceive and understand real-world structures. Previous hyperspectral 3D imaging systems ...
    • Tunneling spectroscopy of c-axis epitaxial cuprate junctions 

      Zhou, Panpan; Chen, Liyang; Sochnikov, Ilya; Wu, Tsz Chun; Foster, Matthew S.; Bollinger, Anthony T.; He, Xi; Božović, Ivan; Natelson, Douglas (2020)
      Atomically precise epitaxial structures are unique systems for tunneling spectroscopy that minimize extrinsic effects of disorder. We present a systematic tunneling spectroscopy study, over a broad doping, temperature, and ...
    • Clustering earthquake signals and background noises in continuous seismic data with unsupervised deep learning 

      Seydoux, Léonard; Balestriero, Randall; Poli, Piero; de Hoop, Maarten; Campillo, Michel; Baraniuk, Richard (2020)
      The continuously growing amount of seismic data collected worldwide is outpacing our abilities for analysis, since to date, such datasets have been analyzed in a human-expert-intensive, supervised fashion. Moreover, analyses ...
    • Ultraflexible Neural Electrodes for Long-Lasting Intracortical Recording 

      He, Fei; Lycke, Roy; Ganji, Mehran; Xie, Chong; Luan, Lan (2020)
      Implanted electrodes provide one of the most important neurotechniques for fundamental and translational neurosciences by permitting time-resolved electrical detection of individual neurons in vivo. However, conventional ...
    • Precise measurement of correlations between frequency coupling and visual task performance 

      Young, Joseph; Dragoi, Valentin; Aazhang, Behnaam (2020)
      Functional connectivity analyses focused on frequency-domain relationships, i.e. frequency coupling, powerfully reveal neurophysiology. Coherence is commonly used but neural activity does not follow its Gaussian assumption. ...
    • Flow-Driven Resonant Energy Systems 

      Alabastri, Alessandro (2020)
      Here we provide a physical and mathematical framework for the description of flow-driven oscillators. These oscillators, differently from frequency-driven harmonic systems, are based on countercurrent mass flows and ...
    • 1-bit Phase Shifters for Large-Antenna Full-Duplex mmWave Communications 

      da Silva, José Mairton Barros Jr.; Sabharwal, Ashutosh; Fodor, Gábor; Fischione, Carlo (2020)
      Millimeter-wave using large-antenna arrays is a key technological component for the future cellular systems, where it is expected that hybrid beamforming along with quantized phase shifters will be used due to their ...
    • Percolation and nanosecond fluctuators in V2O3 films within the metal–insulator transition 

      Chen, Liyang; Zhou, Panpan; Kalcheim, Yoav; Schuller, Ivan K.; Natelson, Douglas (2020)
      Vanadium sesquioxide (V2O3) exhibits a metal–insulator transition (MIT) at 160 K between a low temperature, monoclinic, antiferromagnetic Mott insulator and a high temperature, rhombohedral, paramagnetic, metallic phase. ...
    • Versatile phenotype-activated cell sorting 

      Lee, Jihwan; Liu, Zhuohe; Suzuki, Peter H.; Ahrens, John F.; Lai, Shujuan; Lu, Xiaoyu; Guan, Sihui; St-Pierre, François (2020)
      Unraveling the genetic and epigenetic determinants of phenotypes is critical for understanding and re-engineering biology and would benefit from improved methods to separate cells based on phenotypes. Here, we report ...
    • Solar thermal desalination as a nonlinear optical process 

      Dongare, Pratiksha D.; Alabastri, Alessandro; Neumann, Oara; Nordlander, Peter; Halas, Naomi J. (2019)
      The ever-increasing global need for potable water requires practical, sustainable approaches for purifying abundant alternative sources such as seawater, high-salinity processed water, or underground reservoirs. Evaporation-based ...
    • Quantitative analysis of gas phase molecular constituents using frequency-modulated rotational spectroscopy 

      Lou, Minghe; Swearer, Dayne F.; Gottheim, Samuel; Phillips, Dane J.; Simmons, Jay G. Jr.; Halas, Naomi J.; Everitt, Henry O. (2019)
      Rotational spectroscopy has been used for decades for virtually unambiguous identification of gas phase molecular species, but it has rarely been used for the quantitative analysis of molecular concentrations. Challenges ...
    • Polydopamine-Stabilized Aluminum Nanocrystals: Aqueous Stability and Benzo[a]pyrene Detection 

      Renard, David; Tian, Shu; Ahmadivand, Arash; DeSantis, Christopher J.; Clark, Benjamin D.; Nordlander, Peter; Halas, Naomi J. (2019)
      Aluminum nanocrystals have emerged as an earth-abundant material for plasmonics applications. Al nanocrystals readily oxidize in aqueous-based solutions, however, transforming into highly stratified γ-AlOOH nanoparticles ...
    • Ligand-Dependent Colloidal Stability Controls the Growth of Aluminum Nanocrystals 

      Clark, Benjamin D.; DeSantis, Christopher J.; Wu, Gang; Renard, David; McClain, Michael J.; Bursi, Luca; Tsai, Ah-Lim; Nordlander, Peter; Halas, Naomi J. (2019)
      The precise size- and shape-controlled synthesis of monodisperse Al nanocrystals remains an open challenge, limiting their utility for numerous applications that would take advantage of their size and shape-dependent optical ...
    • Impact of chemical interface damping on surface plasmon dephasing 

      Therrien, Andrew J.; Kale, Matthew J.; Yuan, Lin; Zhang, Chao; Halas, Naomi J.; Christopher, Phillip (2019)
      The excellent light harvesting ability of plasmonic nanoparticles makes them promising materials for a variety of technologies that rely on the conversion of photons to energetic charge carriers. In such applications, ...