Frequency control of photonic crystal membrane resonators by monolayer deposition

S. Strauf, M. T. Rakher, I. Carmeli, K. Hennessy, C. Meier, A. Badolato, M. J.A. Dedood, P. M. Petroff, E. L. Hu, E. G. Gwinn, D. Bouwmeester

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58 Scopus citations

Abstract

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.

Original languageEnglish
Article number043116
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume88
Issue number4
DOIs
StatePublished - 2006

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