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Photonic Crystals on Erbium doped tellurite Thin Films for Broadband Enhanced Photoluminescence at Near Infrared

Published online by Cambridge University Press:  12 April 2012

Pao T. Lin ,
M. Vanhoutte ,
J. Hu ,
N. S. Patel ,
V. Singh ,
Y. Cai ,
R. Camacho ,
J. Michel ,
L. C. Kimerling  and
A. Agarwal
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Pao T. Lin
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
M. Vanhoutte
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
J. Hu
Affiliation:
Department of Materials Science and Engineering, University of Delaware, DE 19716, USA
N. S. Patel
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
V. Singh
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Y. Cai
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
R. Camacho
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
J. Michel
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
L. C. Kimerling
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
A. Agarwal
Affiliation:
Materials Processing Center, Microphotonics Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Clara Dimas
Affiliation:
Masdar Institute of Science and Technology, Masdar City, UAE
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Abstract

Two dimensional Er3+-TeO2 thin film photonics crystals (PhCs) are fabricated. These PhCs demonstrate broadband enhancement of PL emission at near Infrared (NIR). The PhC structures are written by dual beam focused ion beam (FIB). Highly uniformed patterns with smooth surfaces are observed. A pattern resolution better than hundred nanometers is achieved. PhCs arrays with photonic lattice constants from 350 nm to 1700 nm are examined in order to optimize the PL extraction efficiency. Strong photoluminescence around 1530 nm is observed by 488-532 nm lasers pumping. A confocal microscopy with spectrometer is used to capture the broadband PL signals from individual PhC array.

The emission enhancement factor and spectral dependent extraction ratio are analyzed to find the interaction between PL lightwave and PhC structures. By optimize the PhC structures, 1500 um-1560 um broadband PL is successfully converted between the PL emission layer and the external cavity. A 60 % enhancement of surface extraction efficiency is achieved when PhC with periodicity a=800 nm is applied. When photonic lattice constants a are smaller than the critical periodicity 600 nm, the PL light becomes confined inside the thin film layer. Simulation is also performed by two dimensional finite difference time domain (FDTD) calculation in order to explain the experimental observed anisotropic PL enhancements.

The broadband PL enhancement enables Er3+-TeO2 PhCs thin film as a potential light source for three dimensional integrated photonic circuits.

Keywords

nanostructurephotoemissionEr
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1392: Symposium K – Materials for High-Performance Photonics , 2012 , mrsf11-1392-k03-08
Copyright
Copyright © Materials Research Society 2012

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References

REFERENCES

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