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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Influence of gold nanoparticles on the nonlinear optical and photoluminescence properties of Eu2O3 doped alkali borate glasses
Physical Chemistry Chemical Physics, Volume 22, No. 4, Year 2020
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Description
Alkali borate glasses activated with trivalent europium ions and rooted with gold (Au) nanoparticles (NPs) were synthesised through a melt quenching process involving a selective thermochemical reduction and their applicability as photonic materials was assessed in detail. Non-linear optical (NLO) measurements were performed using a Z-scan approach in the wavelength range of 700-1000 nm. The open aperture Z-scan signatures for the Eu3+-containing glasses embedded with and without the Au NPs established a reverse saturable absorption (RSA) at all of the studied wavelengths ascribed to the two-photon absorption (2PA). Surprisingly, the nonlinear optical absorption switched to a saturable absorption (SA) with an increase in the concentration of AuCl3. With the incorporation of the Au NPs, the UV excited photoluminescence (PL) intensity of the Eu3+-doped glasses increased first as a consequence of the local field enhancement by the Au NPs, and subsequently decreased at a higher concentration of AuCl3 due to the reverse energy transfer from the Eu3+ ion to the Au0 NPs. The electronic polarization effect of the host glass enhanced the 5D0 → 7F4 transition intensity on the incorporation of the gold NPs owing to the gold NP-embedded glasses showing a deep-red emission. The NLO and PL studies suggested that the investigated glasses containing a 0.01 mol% of AuCl3 is practically appropriate for photonic applications. © 2020 the Owner Societies.
Authors & Co-Authors
Jagannath, Gangareddy
India, Bengaluru
Bangalore University
Eraiah, Bheemaiah
India, Bengaluru
Bangalore University
Som, S.
Taiwan, Taipei
National Taiwan University
Vinitha, G.
India, Chennai
Vellore Institute of Technology, Chennai
Pramod, A. G.
India, Bengaluru
Bangalore University
Katturi, Naga Krishnakanth
India, Hyderabad
University of Hyderabad
Soma, Venugopal Rao
India, Hyderabad
University of Hyderabad
Annapurna, Kalyandurg Sravani
India, Kolkata
Central Glass and Ceramic Research Institute India
Das, Subrata
India, Thiruvananthapuram
National Institute for Interdisciplinary Science and Technology
Statistics
Citations: 60
Authors: 9
Affiliations: 8
Identifiers
Doi:
10.1039/c9cp05783h
ISSN:
14639076
Research Areas
Environmental