Now showing items 1-20 of 36

    • Polarization-resolved plasmon-modulated emissions of quantum dots coupled to aluminum dimers with sub-20 nm gaps 

      Tobing, Landobasa Yosef Mario; Zhang, Dao Hua; Fong, Kah Ee; Muhammad Danang Birowosuto; Gao, Yuan; Dang, Cuong; Demir, Hilmi Volkan (2018)
      An aluminum dimer nanoantenna with nanogaps is an ideal platform for enhancing light–matter interaction at the nanoscale for the UV–vis spectrum, but its realization has been hindered by the surface oxidation of aluminum ...
    • Spatial mode rotator based on mechanically induced twist and bending in few-mode fibers 

      Yu, Dawei; Fu, Songnian; Tang, Ming; Shum, Perry; Liu, Deming (2015)
      Recently, few-mode fiber (FMF) based mode division multiplexing (MDM) transmission together with multi-input multi-output (MIMO) signal processing technique is ideal candidate to solve future single mode fiber (SMF) capacity ...
    • Ring grating-nanoprism structure for efficient focusing of surface plasmon polaritons 

      Rahbany, N.; Geng, W.; Bachelot, R.; Couteau, C. (2015)
      This work aims to study light-matter interaction at the nanoscale by integrating emitters with plasmonic structures. Our proposed structure consists of metallic nanoprisms in the center of ring diffraction gratings. Surface ...
    • Offset-16QAM-based coherent WDM with multi-carrier group detection 

      Xiang, Meng; Fu, Songnian; Tang, M.; Shum, P.; Liu, Deming (2015)
      Recently, offset-QAM based coherent WDM (CoWDM) has been proposed to build up spectrally-efficient multi-carrier superchannels. Compared with Nyquist wavelength division multiplexing (N-WDM) and orthogonal frequency division ...
    • Morphology controlled lithium storage in Li3VO4 anodes 

      Yang, Guang; Zhang, Bowei; Feng, Jianyong; Lu, Yu; Wang, Zhiqiang; Aravindan, Vanchiappan; Aravind, Muthiah; Liu, Jilei; Srinivasan, Madhavi; Shen, Zexiang; Huang, Yizhong (2018)
      Li3VO4 (LVO) anode materials with controllable morphologies ranging from spherical-assemblies, single-crystal nanorods, and flower shapes to bulk-shapes were fabricated via a solvothermal approach using different alcohols ...
    • Crown Ethers Enable Room Temperature Synthesized CsPbBr3 Quantum Dots for Light-Emitting Diodes 

      Veldhuis, Sjoerd Antonius; Ng, Yan Fong; Ahmad, Riyas; Bruno, Annalisa; Jamaludin, Nur Fadilah; Damodaran, Bahulayan; Mathews, Nripan; Mhaisalkar, Subodh Gautam (2018)
      The synthesis of all-inorganic cesium lead halide perovskite quantum dots (QDs) typically requires high temperatures, stringent conditions, large quantities of surface ligands, and judicious purification steps to overcome ...
    • Precursor Non-stoichiometry to Enable Improved CH3NH3PbBr3 Nanocrystal LED Performance 

      Chandran, Bevita K; Veldhuis, Sjoerd Antonius; Chin, Xin Yu; Bruno, Annalisa; Yantara, Natalia; Chen, Xiaodong; Mhaisalkar, Subodh (2018)
      High photoluminescence quantum yields and narrow emission wavelengths, combined with low temperature solution processing, make CH3NH3PbBr3 nanocrystals (NCs) favorable candidates for light-emitting applications. Herein, ...
    • Energy Transfer Efficiency from ZnO-Nanocrystals to Eu3+ Ions Embedded in SiO2 Film for Emission at 614 nm 

      Mangalam, Vivek; Pita, Kantisara (2017)
      In this work, we study the energy transfer mechanism from ZnO nanocrystals (ZnO-nc) to Eu3+ ions by fabricating thin-film samples of ZnO-nc and Eu3+ ions embedded in a SiO2 matrix using the low-cost sol-gel technique. The ...
    • Assessment and Prediction of Negative Symptoms of Schizophrenia from RGB+D Movement Signals 

      Chakraborty, Debsubhra; Tahir, Yasir; Yang, Zixu; Maszczyk, Tomasz; Dauwels, Justin; Thalmann, Daniel; Magnenat Thalmann, Nadia; Tan, Bhing-Leet; Lee, Jimmy (2017)
      Negative symptoms of schizophrenia significantly affect the daily functioning of patients, especially movement and expressive gestures. The diagnosis of such symptoms is often difficult and require the expertise of a trained ...
    • Optical fiber magnetic field sensor based on magnetic fluid and microfiber mode interferometer 

      Zheng, Yangzi; Dong, Xinyong; Chan, Chi Chiu; Shum, Perry Ping; Su, Haibin (2014)
      A magnetic field sensor is proposed based on the combination of magnetic fluid (MF) and an optical microfiber mode interferometer (MMI). It is measured that the MMI is highly sensitive to ambient refractive index (RI) with ...
    • Synthesis and assessment of new cyclopenta-2,4-dienone derivatives for energy storage applications 

      Lim, Zheng Bang; Tan, Kim Seng; Lunchev, Andrey V.; Li, Hairong; Cho, Sung Ju; Grimsdale, Andrew Clive; Yazami, Rachid (2015)
      A series of tetraphenylcyclopenta-2,4-dienones with various substituents including hydrogen, thiophene and methoxy groups were prepared to compare their suitability as materials for forming alkali metal- based (Li or Na) ...
    • Review of diverse optical fibers used in biomedical research and clinical practice 

      Keiser, Gerd; Xiong, Fei; Cui, Ying; Shum, Perry Ping (2014)
      Optical fiber technology has significantly bolstered the growth of photonics applications in basic life sciences research and in biomedical diagnosis, therapy, monitoring, and surgery. The unique operational characteristics ...
    • Effect of OFF-state stress induced electric field on trapping in AlGaN/GaN high electron mobility transistors on Si (111) 

      Anand, M. J.; Ng, G. I.; Arulkumaran, S.; Manoj Kumar, C. M.; Ranjan, K.; Vicknesh, S.; Foo, S. C.; Syamal, B.; Zhou, X. (2015)
      The influence of electric field (EF) on the dynamic ON-resistance (dyn-R DS[ON]) and threshold-voltage shift (ΔVth) of AlGaN/GaN high electron mobility transistors on Si has been investigated using pulsed current-voltage ...
    • Defect-band mediated ferromagnetism in Gd-doped ZnO thin films 

      Venkatesh, S.; Franklin, J. B.; Ryan, M. P.; Lee, J.-S.; Ohldag, Hendrik; McLachlan, M. A.; Alford, N. M.; Roqan, I. S. (2015)
      Gd-doped ZnO thin films prepared by pulsed laser deposition with Gd concentrations varying from 0.02–0.45 atomic percent (at. %) showed deposition oxygen pressure controlled ferromagnetism. Thin films prepared with Gd ...
    • Graphene-MoS2 hybrid nanostructures enhanced surface plasmon resonance biosensors 

      Zeng, Shuwen; Hu, Siyi; Xia, Jing; Anderson, Tommy; Dinh, Xuan-Quyen; Meng, Xiang-Min; Coquet, Philippe; Yong, Ken-Tye (2014)
      In this work, we propose a new configuration of surface plasmon resonance (SPR) sensor that is based on graphene–MoS2 hybrid structures for ultrasensitive detection of molecules. The proposed system displays a phase-sensitivity ...
    • Reduction of current collapse in AlGaN/GaN MISHEMT with bilayer SiN/Al2O3 dielectric gate stack 

      Anand, M. J.; Ng, G. I.; Vicknesh, S.; Arulkumaran, Subramaniam; Ranjan, K. (2013)
      We have studied the drain current dispersion characteristics of conventional AlGaN/GaN HEMTs and SiN/Al2O3/AlGaN/GaN metal-insulator-semiconductor high electron mobility transistors (MISHEMT) fabricated on silicon substrate. ...
    • Future mobility survey 

      Cottrill, Caitlin D.; Pereira, Francisco Câmara; Zhao, Fang; Dias, Iněs Ferreira; Lim, Hock Beng; Ben-Akiva, Moshe E.; Zegras, P. Christopher (2013)
      The Future Mobility Survey (FMS) is a smartphone-based prompted-recall travel survey that aims to support data collection initiatives for transport-modeling purposes. This paper details the considerations that have gone ...
    • A polyoxovanadate as an advanced electrode material for supercapacitors 

      Chen, Han-Yi; Wee, Grace; Al-Oweini, Rami; Friedl, Jochen; Tan, Kim Soon; Wang, Yuxi; Wong, Chui Ling; Kortz, Ulrich; Stimming, Ulrich; Srinivasan, Madhavi (2014)
      Polyoxovanadate Na6V10O28 is investigated for the first time as electrode material for supercapacitors (SCs). The electrochemical properties of Na6V10O28 electrodes are studied in Li+-containing organic electrolyte (1 m ...
    • Photoactive nanocrystals by low-temperature welding of copper sulfide nanoparticles and indium sulfide nanosheets 

      Lim, Hui Min; Tan, Jia Yi; Batabyal, Sudip Kumar; Magdassi, Shlomo; Mhaisalkar, Subodh Gautam; Wong, Lydia H. (2014)
      We successfully utilize the concept of coalescence and room-temperature sintering to prepare morphologically different nanoparticles. n-Type chalcogenide (CuIn5S8) nanocrystals are synthesized at room temperature by simple ...
    • Direct measurement of coherent phonon dynamics in solution-processed stibnite thin films 

      Chong, Wee Kiang; Xing, Guichuan; Liu, Yun; Gui, Ee Ling; Zhang, Qing; Xiong, Qihua; Mathews, Nripan; Gan, Chee Kwan; Sum, Tze Chien (2014)
      We report observations of coherent phonon oscillations in solution-processed polycrystalline stibnite (Sb2S3) photovoltaic thin films using transient absorption spectroscopy. Detailed optical spectroscopy correlated by ...