A novel micro-electro-optic filter formed by integrating photonic crystals with photodiodes on a silicon substrate is demonstrated in this paper. P-n diodes were fabricated on a Silicon wafer using standard processes. Reactive ion etching (RIE) was used to form trenches into the diodes to contain and position photonic crystals. The wafer was then immersed vertically into a slowly evaporating colloidal suspension of silica mircrospheres to assemble the photonic crystal over the photodiodes. Spectral measurements using a grating monochrometer confirmed that a dip exists in the photocurrent response of the photonic crystal filter-photodetectors at the predicted wavelength of 600 nm. We performed a series of measurements using several different sphere sizes and light incidence angles to further characterize the filters, and evaluated the use of device as a wavelength selective detector. Since silica has a low coefficient of thermal expansion, the wavelength selective characteristics of the device are expected to be insensitive to ambient temperatures.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.