Abstract

Dichroic Er³⁺:Au-antimony glass nanocomposites are synthesized in a new reducing glass (dielectric) matrix (mol%) K₂O-B₂O₃-Sb₂O₃ (KBS) by a single-step melt-quench technique involving selective thermochemical reduction principle. Transmission electron microscopic images reveal hexagonal Au^o nanoparticles having major axes about 9-23 nm. Dichroic behavior arises due to hexagonal Au^o nanoparticles of aspect ratio 1.2-1.3. Au^o nanoparticles of concentration of 0.03 wt%(4.1×10¹⁸ atoms/cm³) drastically enhances the intensity (2-5 folds) of both 536 (S3/24-->I15/24, green) and 645 (F9/24-->I15/24, red) nm emission bands of Er³⁺. Local field enhancement induced by Au^o surface plasmon resonance (SPR) and energy transfer from fluorescent Au^o-->Er³⁺ ions are found to be responsible for enhancement while, at very high Au concentration, energy transfer from Er³⁺-->Au^o and optical reabsorption due to Au^o SPR result in quenching.

© 2009 Optical Society of America

» View Full Text: Acrobat PDF (611 KB)

History
Original Manuscript: March 20, 2009
Manuscript Accepted: May 20, 2009
Published: June 23, 2009

References

Please [login to View References]

Author Affiliations

Tirtha Som, Basudeb Karmakar

Glass Technology Laboratory, Glass Division, Central Glass and Ceramic Research Institute (Council of Scientific and Industrial Research) 196, Raja S.C. Mullick Road, Kolkata 700 032, India

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

Advanced Search

Recent ToC Categories (Beta)

• Oct 08 2009 : See the latest ISP articles in the Applied Optics feature on Digital Holography in 3-D Imaging.
• Sep 25 2009 : Energy Express: Optics Express announces a special bi-monthly supplement dedicated to rapid developments in optics for sustainable energy.
• Sep 21 2009 : The 2009 Education and Training in Optics and Photonics papers are now available.

More News

• Invisibility Visualized
  Nov 12, 2009 - Scientists and curiosity seekers who want to know what a partially or... more
• Diamonds are a Laser's Best Friend
  Sep 18, 2009 - Tomorrow’s lasers may come with a bit of bling, thanks to a new... more
• Open Wide and Say ‘Zap’
  Aug 19, 2009 - A group of researchers in Australia and Taiwan has developed a new... more