1,721,017 research outputs found
Light confinement within nanoholes in nanostructured optical fibers
No full textWe report fabrication of the lead silicate microstructured fibers (MOFs) with core holes as small as 20nm, the smallest holes fabricated within the core of an optical fiber to date. We show that light confinement and average mode intensity within such holes are strongly dependent on the hole size. Light confinement within 80nm and 250nm core hole within the fabricated MOFs has been experimentally characterized using Scanning Near-field Optical Microscopy (SNOM).Yinlan Ruan, Heike Ebendorff-Heidepriem, Shahraam Afshar and Tanya M. Monr
Structures, bioactivities and future prospective of polysaccharides from Morus alba (white mulberry): A review
No full textAbstract not availableXirui He, Jiacheng Fang, Yinlan Ruan, Xiaoxiao Wang, Yin Sun, Ni Wu, Zefeng Zhao, Yu Chang, Ning Ning, Hao Guo, Linhong Huan
Suspended core fiber for propagating vortex LP11 modes
No full textPoster presentation JTu4A.74Abstract not availableHong Ji, Yinlan Ruan, Shahraam Afshar V. and Tanya M. Monr
Nanodiamond in tellurite glass Part I: origin of loss in nanodiamond-doped glass
No full textAbstract not availableHeike Ebendorff-Heidepriem, Yinlan Ruan, Hong Ji, Andrew D. Greentree, Brant C. Gibson, and Tanya M. Monr
2D Photonic crystals in chalcogenide glass
No full textCameron Smith, Christian Grillet, Eric C. Magi, Yinlan Ruan, Darren Freeman, Barry Luther-Davies, Steve Madden, Andrei Rode, Snjezana Tomljenovic-Hanic, D. J. Moss, and Benjamin J. Eggleto
Highly efficient fluorescence sensing using microstructured optical fibres: general model and experiment
No full textPoster session 1, Article number 70042QA general model of excitation and fluorescence recapturing by the forward and backward modes of filled microstructured optical fibres (MOFs) is developed for fluorecence-based fibre optic sensors. It is demonstrated that the light-matter overlap alone does not determine the optimal fibre choice for maximum sensing efficiency. Fibre designs with sub-wavelength features and high-index glasses exhibit localised regions of high intensity, and we show that these regions can lead to approximately two orders of magnitude enhancement of fluorescence recapturing. We demonstrate higher efficiency of fluorescence recapturing into backward modes in comparison with that of forward modes. We present experimental results for both backward and forward flourescence recapturing and demostrate a good qualitative agreement between the numerical model and experimental results.Shahraam Afshar V., Yinlan Ruan, Stephen C. Warren-Smith, Heike Ebendorff-Heidepriem, and Tanya M. Monr
Fabrication and characterization of an egg-shaped hollow fiber microbubble
Full text linkIn this paper, an egg-shaped microbubble is proposed and analyzed firstly, which is fabricated by the pressure-assisted arc discharge technique. By tailoring the arc parameters and the position of glass tube during the fabrication process, the thinnest wall of the fabricated microbubble could reach to the level of 873nm. Then, the fiber Fabry-Perot interference technique is used to analyze the deformation of microbubble that under different filling pressures. It is found that the endface of micro-bubble occurs compression when the inner pressure increasing from 4Kpa to 1400KPa. And the pressure sensitivity of such egg-shaped microbubble sample is14.3pm/Kpa. Results of this study could be good reference for developing new pressure sensors, etc.Guanjun Wang, Yinlan Ruan, Pinggang Jia, Zhiguo Gui, Pengcheng Zhang, Chao Wang, Shen Liu, Changrui Liao, Guolu Yin, Yiping Wan
Nitric oxide optical fiber sensor based on exposed core fibers and CdTe/CdS quantum dots
No full textData source: Supplementary data, https://ars.els-cdn.com/content/image/1-s2.0-S0925400518311171-mmc1.docxNitric oxide plays a crucial role as a messenger in biological systems, but limitations in measurement are restricted due to its relatively low concentration and short half-life time. Here we report a novel approach to sensing nitric oxide by using an exposed core fiber with its core coated with CdTe/CdS core/shell quantum dots. This enables rapid detection and opens up the possibility of monitoring its production within biological systems. The detection mechanism is based on fluorescence quenching of CdTe/CdS quantum dots by nitric oxide, which can coordinate with Cd²⁺ directly as a ligand forming transition metal complexes. We demonstrate that CdTe/CdS quantum dots functionlization exposed core optical fibers can respond rapidly to nitric oxide in physiological environments with picomolar sensitivity.Liyun Ding, Yinlan Ruan, Tao Li, Jun Huang, Stephen C. Warren-Smith, Heike Ebendorff-Heidepriem, Tanya M. Monr
2D nonlinear photonic crystals nanocavities in chalcogenide for all-optical processing
No full textCopyright © 2008 PIERS. All Rights Reserved.We demonstrate that high-Q nanocavity mode in 2D photonic crystal made in highly nonlinear chalcogenide glass can be excited using evanescent coupling from a tapered optical fibre. This scheme provides a promising platform to realize low power integrated all-optical switching and logic functionsChristian Grillet, Cameron Smith, Snjezana Tomljenovic-Hanic, Eric C. Magi, Yinlan Ruan, Darren Freeman, Barry Luther-Davies, Steve Madden, Andrei Rode, M. Lee, D. J. Moss, and Benjamin J. Eggleto
SERS and NMR studies of typical aggregation-induced emission molecules
No full textOver recent decades, aggregation-induced emission (AIE) molecules have attracted increasing attention. Restriction of intramolecular rotation (RIR) has been widely accepted as the cause of the emission when AIE molecules aggregate into clusters. The intramolecular rotation of AIE molecules can be monitored by molecular vibration spectra such as nuclear magnetic resonance (NMR), infrared, and Raman, especially surface-enhanced Raman scattering (SERS) which has high sensitivity down to a single molecule. We employed SERS and NMR to study the AIE emission mechanism and compared experimental results with simulation data to monitor the RIR. Interestingly, we found that intramolecular rotation was also restricted for individual AIE molecules loaded onto SERS substrate surfaces due to the laid-down configuration.Cheng Fang, Yujun Xie, Martin R. Johnston, Yinlan Ruan, Ben Zhong Tang, Qian Peng, and Youhong Tan
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