Now showing items 1-11 of 11

    • Advances in optical sensing of explosive vapours 

      Gillanders, Ross Neil; Samuel, Ifor David William; Turnbull, Graham Alexander; Campbell, Iain Angus; Glackin, James Michael Edward (SciTePress, 2018-01-25) - Conference item
      Optical techniques for the detection of explosives are receiving increasing interest due to potentially fast responding, highly-sensitive systems. Conjugated polymers are suitable probe materials for this application since ...
    • BODIPY star-shaped molecules as solid state colour converters for visible light communications 

      Vithanage, Chiranthika Dimali Amarasinghe; Manousiadis, Pavlos; Sajjad, Muhammad Tariq; Rajbhandari, Sujan; Chun, Hyunchae; Orofino, Clara; Cortizo-Lacalle, Diego; Kanibolotsky, Alexander; Faulkner, Grahame; Findlay, Neil; O'Brien, Dominic; Skabara, Peter; Samuel, Ifor David William; Turnbull, Graham Alexander (2016-07-06) - Journal article
      In this paper we study a family of solid-state, organic semiconductors for visible light communications. The star-shaped molecules have a boron-dipyrromethene (BODIPY) core with a range of side arm lengths which control ...
    • Flexible glass hybridized colloidal quantum dots for Gb/s visible light communications 

      Foucher, C.; Sufyan, Mohamed Islim; Guilhabert, B.; Videv, S.; Rajbhandari, S.; Gomez Diaz, A.; Chun, H.; Vithanage, Chiranthika Dimali Amarasinghe; Turnbull, Graham Alexander; Samuel, Ifor David William; Faulkner, G.; O’Brien, D. C.; Hass, H.; Laurand, N.; Dawson, M. D. (2018-02) - Journal article
      Color converting films of colloidal quantum dots (CQDs) encapsulated with flexible glass are integrated with microsize GaN LEDs (μLEDs) in order to form optical sources for high-speed visible light communications (VLC). ...
    • Green perovskite distributed feedback lasers 

      Harwell, Jonathon Robert; Whitworth, Guy Luke; Turnbull, Graham Alexander; Samuel, Ifor David William (2017-09-15) - Journal article
      A visible perovskite distributed feedback laser is fabricated for the first time. Through the use of nanocrystal pinning, highly luminescent methylammonium lead bromide films are used to produce stable lasers emitting at ...
    • Intermolecular states in organic dye dispersions : excimers vs aggregates 

      Musser, A. J.; Rajendran, Sai Kiran; Georgiou, K.; Gai, L.; Grant, R. T.; Shen, Z.; Cavazzini, M.; Ruseckas, Arvydas; Turnbull, Graham Alexander; Samuel, Ifor David William; Clark, J.; Lidzey, D. G. (2017-09-07) - Journal article
      Rapid excited-state quenching in the solid state is a widespread limitation for organic chromophores. Even when molecules are dispersed in neutral host matrices, photoluminescence quantum yields decrease sharply with ...
    • An organic vortex laser 

      Stellinga, Daan; Pietrzyk, Monika; Glackin, James Michael Edward; Wang, Yue; Bansal, Ashu Kumar; Turnbull, Graham Alexander; Dholakia, Kishan; Samuel, Ifor David William; Krauss, T (2018-03-27) - Journal article
      Optical vortex beams are at the heart of a number of novel researchdirections, both as carriers of information and for the investigation of optical activity and chiral molecules. Optical vortex beams are beams of light ...
    • Ormosil-coated conjugated polymers for the detection of explosives in aqueous environments 

      Gillanders, Ross N.; Campbell, Iain A.; Glackin, James M. E.; Samuel, Ifor D. W.; Turnbull, Graham Alexander (2018-03-01) - Journal article
      A fluorescence-based sensor for detecting explosives, based on a conjugated polymer coated with an ormosil layer, has been developed for use in aqueous environments. The conjugated polymer Super Yellow was spin-coated onto ...
    • A portable, low-cost system for optical explosive detection based on a CMOS camera 

      Gillanders, Ross; Samuel, Ifor David William; Turnbull, Graham Alexander; Campbell, Iain Angus (SciTePress, 2016-02-29) - Conference item
      Humanitarian demining requires a variety of methods and instrumentation for effective mine clearance, since a wide range of materials are used in mine manufacturing. However, landmines release vapours over time that can ...
    • A saturated red color converter for visible light communication using a blend of star-shaped organic semiconductors 

      Sajjad, Muhammad Tariq; Manousiadis, Pavlos; Orofino, Clara; Kanibolotsky, Alexander; Findlay, Neil; Rajbhandari, Sujan; Vithanage, Chiranthika Dimali Amarasinghe; Chun, Hyunchun; Faulkner, Graham; O'Brien, Dominic; Skabara, Peter; Turnbull, Graham Alexander; Samuel, Ifor David William (2017-01) - Journal article
      We report a study of blends of semiconducting polymers as saturated red color converters to replace commercial phosphors in hybrid LEDs for visible light communication (VLC). By blending two star-shaped organic semiconductor ...
    • Transfer-printed micro-LED and polymer-based transceiver for visible light communications 

      Rae, Katherine; Manousiadis, Pavlos; Islim, Mohamed; Yin, Liang; Carreira, Jose; McKendry, Jonathan; Guihabert, Benoit; Samuel, Ifor David William; Turnbull, Graham Alexander; Laurand, Nicolas; Haas, Harald; Dawson, Martin (2018-11-14) - Journal article
      Visible light communications (VLC) is an emerging technology that uses LEDs, such as found in lighting fixtures and displays, to transmit data wirelessly. Research has so far focused on LED transmitters and on photoreceivers ...
    • Wide field of view fluorescent antenna for visible light communications beyond the étendue limit 

      Manousiadis, Pavlos; Rajbhandari, Sujan; Mulyawan, Rahmat; Vithanage, Chiranthika Dimali Amarasinghe; Chun, Hyunchae; Faulkner, Grahame; O'Brien, Dominic C; Turnbull, Graham Alexander; Collins, Stephen; Samuel, Ifor David William (2016-07-20) - Journal article
      Visible light communications (VLC) is an important emerging field aiming to use optical communications to supplement Wi-Fi. This will greatly increase the available bandwidth so that demands for ever-higher data rates can ...