Optimized Waveguide Geometry for Low Amplified Spontaneous Emission Operation on ITO-Coated Glass

We demonstrated a significant reduction of amplified spontaneous emission (ASE) threshold for an organic optical gain medium operation on an ITO-coated glass by introducing a solution-processed cellulose acetate (CA) thin film as a space layer between the ITO electrode and the optical gain active la...

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Published in:IEEE journal of selected topics in quantum electronics 2016-01, Vol.22 (1), p.21-25
Main Authors: Yi, Jianpeng, Fang, Yueting, Fang, Ting, Chi, Lang, Xia, Ruidong, Wei, Wei, Xia, Bin
Format: Article
Language:English
Subjects:
Amplification
amplified spontaneous emission (ASE)
cellulose acetate
Gain
Glass
Indium tin oxide
Nanoparticles
Optical films
Optical pumping
Optical waveguides
Organic laser
PFO
Reduction
silver nanoparticles (AgNPs)
Spontaneous emission
Thresholds
Waveguides
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cited_by cdi_FETCH-LOGICAL-c300t-c4eb6e27432684435ffca96e59899e4ed32c0d503a339138490fed2a950afb053
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container_title IEEE journal of selected topics in quantum electronics
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creator Yi, Jianpeng
Fang, Yueting
Fang, Ting
Chi, Lang
Xia, Ruidong
Wei, Wei
Xia, Bin
description We demonstrated a significant reduction of amplified spontaneous emission (ASE) threshold for an organic optical gain medium operation on an ITO-coated glass by introducing a solution-processed cellulose acetate (CA) thin film as a space layer between the ITO electrode and the optical gain active layer. Using PFO as an optical gain medium, we observed a 4.4-fold threshold reduction from 140 μJ/cm 2 for glass/ITO/PFO device to 32 μJ/cm 2 for glass/ITO/CA/PFO by controlling the thickness of CA film at 38 nm, and 9.9-fold reduction to 15 μJ/cm 2 by further increasing the thickness of CA film to around 152 nm. Furthermore, we investigated symmetrical waveguide of glass/ITO/CA/PFO/CA configuration. It exhibited 3.3-fold lower ASE threshold than that of asymmetrical waveguide of glass/ITO/CA/PFO (6.0 versus 20.0 μJ/cm 2 ), which was even lower than that of quartz/PFO (8.4 μJ/cm 2 ). The CA film was also doped with Ag nanoparticles (AgNPs) in various ratios to improve the conductivity. ASE threshold of glass/ITO/CA(AgNPs)/PFO exhibited no detectable increase with the doping ratio of Ag nanoparticles up to 15 wt%.
doi_str_mv 10.1109/JSTQE.2015.2456339
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subjects Amplification
amplified spontaneous emission (ASE)
cellulose acetate
Gain
Glass
Indium tin oxide
Nanoparticles
Optical films
Optical pumping
Optical waveguides
Organic laser
PFO
Reduction
silver nanoparticles (AgNPs)
Spontaneous emission
Thresholds
Waveguides
title Optimized Waveguide Geometry for Low Amplified Spontaneous Emission Operation on ITO-Coated Glass
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