TITLE

Local tuning of photonic crystal nanocavity modes by laser-assisted oxidation

AUTHOR(S)
Lee, H. S.; Kiravittaya, S.; Kumar, S.; Plumhof, J. D.; Balet, L.; Li, L. H.; Francardi, M.; Gerardino, A.; Fiore, A.; Rastelli, A.; Schmidt, O. G.
PUB. DATE
November 2009
SOURCE
Applied Physics Letters;11/9/2009, Vol. 95 Issue 19, p191109
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The authors demonstrate a simple method to achieve local tuning of optical modes in GaAs photonic crystal nanocavities by continuous wave laser-assisted oxidation in air atmosphere. By irradiation with a focused laser beam at power levels of a few tens of milliwatts, photonic crystal nanocavity modes shift to shorter wavelengths by up to 2.5 nm. The mode shifts can be controlled either by varying the laser power or by iterating laser-assisted oxidation steps and are well explained by finite-element-method and finite-difference time-domain simulations. This method provides a simple route to achieve fine spectral tuning of individual nanocavities for photonic devices.
ACCESSION #
45249209

 

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