Physics – Condensed Matter – Materials Science
Scientific paper
2005-08-12
Appl. Phys. Lett. 88, 043116 (2006).
Physics
Condensed Matter
Materials Science
3 pages, 4 figures, submitted to Appl. Phys. Lett
Scientific paper
10.1063/1.2164922
We study the response of GaAs photonic crystal membrane resonators to thin film deposition. Slow spectral shifts of the cavity mode of several nanometers are observed at low temperatures, caused by cryo-gettering of background molecules. Heating the membrane resets the drift and shielding will prevent drift altogether. In order to explore the drift as a tool to detect surface layers, or to intentionally shift the cavity resonance frequency, we studied the effect of self-assembled monolayers of polypeptide molecules attached to the membranes. The 2 nm thick monolayers lead to a discrete step in the resonance frequency and partially passivate the surface.
Badolato Antonio
Bouwmeester Dirk
Carmeli Itai
DeDood Michiel J. A.
Gwynn Beth
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