Optical sensing of square lattice photonic crystal point-shifted nanocavity for protein adsorption detection

Tsan Wen Lu*, Pin Tso Lin, Kuan Un Sio, Po Tsung Lee

*此作品的通信作者

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

We propose a point-shifted D0 nanocavity formed by locally modulating four central air holes in square lattice photonic crystal for optical sensing application. Three defect modes in this nanocavity, including monopole, whispering-gallery, and dipole modes, are identified in experiments. We also apply a chemical treatment on InGaAsP surface to form a 1-octadecanethiol linking monolayer, which enables the following protein adsorption. In experiments, the wavelength shifts of lasing modes in the D0 nanocavity due to the protein adsorption are observed and agree with the simulation results. This can be a practical tool for label-free molecule detection in biomedical researches.

原文English
文章編號213702
期刊Applied Physics Letters
96
發行號21
DOIs
出版狀態Published - 24 5月 2010

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