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Séminaires de doctorants de l’INSP

Whispering Gallery Mode – a detailed study on ZnO microspheres - Pokky Chien - Jeudi 30 mars 2017 à 16h

INSP - UPMC - 4 place Jussieu - 75005 Paris - Barre 22-32, 2e étage, salle 201

Pokky Chien, doctorant taïwanais en visite à l’INSP


We demonstrate the potential for using ZnO microspheres (MS) as a good optical modulator. ZnO MS with smooth surface exhibiting novel whispering gallery mode (WGM) in photoluminescence (PL) were synthesized by hydrothermal techniques. Sharp resonance peaks covering the entire visible range could be excited not only by UV but also visible light. Moreover, the theoretical modeling was carried out. Essential informations about the position, strength, TE and TM modes of each resonance are precisely predicted. Both experimental and theoretical results support that ZnO spherical micro cavity can be a good candidate of modulator for visible optical communication.