Speaker: Dr. Aminul I. Talukder
Date: 14 Jul 2016 (Thursday) Time: 2:30pm to 3:30pm Venue: Executive Seminar Room(S2.2-B2-53), School of EEE, NTU, S639798 Abstract The propagation of shaped optical pulses has been investigated in different dispersive media. A transition from the Superluminal to subluminal of the propagation velocity is observed through a resonantly absorbing medium when the propagation distance is changed from a short to long range. The propagation velocity is described within the framework of net group and reshaping delays. The propagation of pulses with incoherent shapes in an absorptionless system is well described by the net group delay; even the medium causes a great deal of deformation in the transmitted pulse. This has been confirmed for other shape of pulses through different types of absorptionless dispersive media such as angularly dispersive one, photonic crystal fiber, etc. However, in the case of phase modulated chirping pulses in a resonant absorber, the propagation velocity is strongly influenced by the reshaping delay. Direct observation of superluminality or fast light has been confirmed from a series of experiments of pulse propagation through a fiber ring resonator within its negative group delay limit. It is observed that the superluminal propagation of pulse peak is an analytic continuation over time of the earlier portion of the input pulse envelope. Biography Dr. Aminul I. Talukder received the B.Sc. degree and M.Sc degree in Physics from Dhaka University, Bangladesh in 1989 and 1990, the Ph.D. degree in Materials Science from Shizuoka University, Japan, in 2001, respectively. From 2003 to 2005, he was a JSPS Fellowship in Shizuoka University, Japan. He was a Commonwealth Fellowship from 2009 to 2010 in ORC, University of Southampton, UK. He was a JSPS Invitation Fellowship from 2012 to 2013 in Shizuoka University, Japan. He is currently a professor in department of Physics in university of Dhaka, Bangladesh. His research interests include generalization of group velocity- relevance to arbitrary and ultrashort pulses light propagation in linear dispersive systems- resonant absorber/amplifier, laser ablation techniques for nano-particles fabrication of metals and their Use in SERS (Surface Enhanced Raman Spectroscopy), laser induced breakdown spectroscopy (LIBS) and Raman spectroscopy for determination of food adulteration, time resolved fluorescence spectroscopy using ultrashort pulses molecular dynamics and pulse compression and shaping technology fiber based chirped pulse amplification system. Jointly organized by COFT-Centre for Optical Fibre Technology OPTIMUS-Centre for OptoElectronics and Biophotonics School of EEE, The Photonics Institute, Nanyang Technological University; CINTRA-CNRS International NTU THALES Research Alliance IEEE Photonics Society Singapore Chapter OSA Singapore Section
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Cameron Mackintosh's Les Misérables event was organized by IEEE Photonics Society Singapore Chapter on 02 July 2016. Cameron Mackintosh's acclaimed new production of Les Misérables opens at the Esplanade Theatre, Singapore in May for a strictly limited season. Set against the backdrop of 19th century France, LesMisérables is the unforgettable story of heartbreak, passion and the resilience of the human spirit that has become one of the world's most popular musicals. Featuring beloved songs 'I Dreamed a Dream', 'On My Own', 'Bring Him Home' and 'One Day More', this breathtaking new production has been completely reimagined with glorious new sets and staging. Seen by over 70 million people and winner of over 125 awards, Les Misérables is the musical experience of a lifetime.
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AuthorIEEE IPS Singapore Chapter Archives
October 2019
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