Now showing items 1-20 of 1907

    • Low-loss and single-mode tapered hollow-core waveguides optically coupled with interband and quantum cascade lasers 

      Giglio, Marilena; Patimisco, Pietro; Sampaolo, Angelo; Kriesel, Jason M.; Tittel, Frank K.; Spagnolo, Vincenzo (2018)
      We report single-mode midinfrared laser beam delivery through a 50-cm-long tapered hollow-core waveguide (HCW) having bore diameter linearly increasing from 200 to 260  μm. We performed theoretical calculations to identify ...
    • Rapid Calculation of Molecular Kinetics Using Compressed Sensing 

      Litzinger, Florian; Boninsegna, Lorenzo; Wu, Hao; Nüske, Feliks; Patel, Raajen; Baraniuk, Richard; Noé, Frank; Clementi, Cecilia (2018)
      Recent methods for the analysis of molecular kinetics from massive molecular dynamics (MD) data rely on the solution of very large eigenvalue problems. Here we build upon recent results from the field of compressed sensing ...
    • Effects of etchants in the transfer of chemical vapor deposited graphene 

      Wang, M.; Yang, E.H.; Vajtai, R.; Kono, J.; Ajayan, P.M. (2018)
      The quality of graphene can be strongly modified during the transfer process following chemical vapor deposition (CVD) growth. Here, we transferred CVD-grown graphene from a copper foil to a SiO2/Si substrate using wet ...
    • Biophysics of object segmentation in a collision-detecting neuron 

      Dewell, Richard Burkett; Gabbiani, Fabrizio (2018)
      Collision avoidance is critical for survival, including in humans, and many species possess visual neurons exquisitely sensitive to objects approaching on a collision course. Here, we demonstrate that a collision-detecting ...
    • Double-range near-infrared acetylene detection using a dual spot-ring Herriott cell (DSR-HC) 

      Dong, Ming; Zheng, Chuantao; Yao, Dan; Zhong, Guoqiang; Miao, Shuzhuo; Ye, Weilin; Wang, Yiding; Tittel, Frank K. (2018)
      Design and fabrication of a dual spot-ring Herriott cell (DSR-HC) were proposed. The sealed Herriott cell with a dimensional size of 5.5 cm × 9.2 cm × 32.1 cm, possessed two input/output coupling holes leading to two ...
    • Model reduction by iterative error system approximation 

      Antoulas, A.C.; Benner, Peter; Feng, Lihong (2018)
      The analysis of a posteriori error estimates used in reduced basis methods leads to a model reduction scheme for linear time-invariant systems involving the iterative approximation of the associated error systems. The ...
    • Recent advances in quartz enhanced photoacoustic sensing 

      Patimisco, Pietro; Sampaolo, Angelo; Dong, Lei; Tittel, Frank K.; Spagnolo, Vincenzo (2018)
      This review aims to discuss the latest advancements in quartz-enhanced photoacoustic spectroscopy (QEPAS) based trace-gas sensing. Starting from the QEPAS basic physical principles, the most used QEPAS configurations will ...
    • Minimizing residues and strain in 2D materials transferred from PDMS 

      Jain, Achint; Bharadwaj, Palash; Heeg, Sebastian; Parzefall, Markus; Taniguchi, Takashi; Watanabe, Kenji; Novotny, Lukas (2018)
      Integrating layered two-dimensional (2D) materials into 3D heterostructures offers opportunities for novel material functionalities and applications in electronics and photonics. In order to build the highest quality ...
    • Scaling law for excitons in 2D perovskite quantum wells 

      Blancon, J.-C.; Stier, A.V.; Tsai, H.; Nie, W.; Stoumpos, C.C.; Traoré, B.; Pedesseau, L.; Kepenekian, M.; Katsutani, F.; Noe, G.T.; Kono, J.; Tretiak, S.; Crooker, S.A.; Katan, C.; Kanatzidis, M.G.; Crochet, J.J.; Even, J.; Mohite, A.D. (2018)
      Ruddlesden-Popper halide perovskites are 2D solution-processed quantum wells with a general formula A2A'n-1M n X3n+1, where optoelectronic properties can be tuned by varying the perovskite layer thickness (n-value), and ...
    • Dual-feedback mid-infrared cavity-enhanced absorption spectroscopy for H2CO detection using a radio-frequency electrically-modulated interband cascade laser 

      He, Qixin; Zheng, Chuantao; Lou, Minhan; Ye, Weilin; Wang, Yiding; Tittel, Frank K. (2018)
      A mid-infrared cavity-enhanced sensor system was demonstrated for the detection of formaldehyde (H2CO) using a continuous-wave (cw) interband cascade laser (ICL) centered at 3599 nm. A compact Fabry-Perot (F-P) cavity with ...
    • 3D printed fiber optic faceplates by custom controlled fused deposition modeling 

      Wang, Ye; Gawedzinski, John; Pawlowski, Michal E.; Tkaczyk, Tomasz S. (2018)
      A 3D printing technique for manufacturing air-clad coherent fiber optic faceplates is presented. The custom G-code programming is implemented on a fused deposition modeling (FDM) desktop printer to additively draw optical ...
    • Pre-synaptic Muscarinic Excitation Enhances the Discrimination of Looming Stimuli in a Collision-Detection Neuron 

      Zhu, Ying; Dewell, Richard B.; Wang, Hongxia; Gabbiani, Fabrizio (2018)
      Visual neurons that track objects on a collision course are often finely tuned to their target stimuli because this is critical for survival. The presynaptic neural networks converging on these neurons and their role in ...
    • Quartz-tuning-fork enhanced photothermal spectroscopy for ultra-high sensitive trace gas detection 

      Ma, Yufei; He, Ying; Tong, Yao; Yu, Xin; Tittel, Frank K. (2018)
      A gas sensing method based on quartz-tuning-fork enhanced photothermal spectroscopy (QEPTS) is reported in this paper. Unlike usually used thermally sensitive elements, a sharply resonant quartz-tuning-fork with the ...
    • Biophysics of object segmentation in a collision-detecting neuron 

      Dewell, Richard Burkett; Gabbiani, Fabrizio (2018)
      Adaptive collision avoidance behaviours require accurate detection of complex spatiotemporal properties of an object approaching in an animal's natural, three-dimensional environment. Within the locust, the lobula giant ...
    • Metallic nanoparticles for cancer immunotherapy 

      Evans, Emily Reiser; Bugga, Pallavi; Asthana, Vishwaratn; Drezek, Rebekah (2018)
      Cancer immunotherapy, or the utilization of the body’s immune system to attack tumor cells, has gained prominence over the past few decades as a viable cancer treatment strategy. Recently approved immunotherapeutics have ...
    • Performance Enhancement of Methane Detection Using a Novel Self-Adaptive Mid-Infrared Absorption Spectroscopy Technique 

      Song, Fang; Zheng, Chuantao; Yan, Wanhong; Ye, Wei Lin; Zhang, Yu; Wang, Yiding; Tittel, Frank K. (2018)
      An electrical-domain self-adaptive mid-infrared absorption spectroscopy for methane detection based on an interband cascade laser was demonstrated. By adding noise into the laser drive signal, denoising and sensing ...
    • Review of Incoherent Broadband Cavity-Enhanced Absorption Spectroscopy (IBBCEAS) for Gas Sensing 

      Zheng, Kaiyuan; Zheng, Chuantao; Zhang, Yu; Wang, Yiding; Tittel, Frank K. (2018)
      Incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) is of importance for gas detection in environmental monitoring. This review summarizes the unique properties, development and recent progress of the ...
    • Integrated light-sheet illumination using metallic slit microlenses 

      Ye, Fan; Avants, Benjamin W.; Veeraraghavan, Ashok; Robinson, Jacob T. (2018)
      Light sheet microscopy (LSM) - also known as selective plane illumination microscopy (SPIM) - enables high-speed, volumetric imaging by illuminating a two-dimensional cross-section of a specimen. Typically, this light sheet ...
    • Isotropic Seebeck coefficient of aligned single-wall carbon nanotube films 

      Fukuhara, Kengo; Ichinose, Yota; Nishidome, Hiroyuki; Yomogida, Yohei; Katsutani, Fumiya; Komatsu, Natsumi; Gao, Weilu; Kono, Junichiro; Yanagi, Kazuhiro (2018)
      How the morphology of a macroscopic assembly of nanoobjects affects its properties is a long-standing question in nanomaterials science and engineering. Here, we examine how the thermoelectric properties of a flexible thin ...
    • Carbon nanotube woven textile photodetector 

      Zubair, Ahmed; Wang, Xuan; Mirri, Francesca; Tsentalovich, Dmitri E.; Fujimura, Naoki; Suzuki, Daichi; Soundarapandian, Karuppasamy P.; Kawano, Yukio; Pasquali, Matteo; Kono, Junichiro (2018)
      The increasing interest in mobile and wearable technology demands the enhancement of functionality of clothing through incorporation of sophisticated architectures of multifunctional materials. Flexible electronic and ...