An array of droplets of photonic crystal with polystyrene colloidal particles was assembled on silicon using ink-jet printing. A microreflectance spectrum from a single droplet was collected using an optical microscope and a spectrometer. It was observed that the photonic band gap of these droplets shifts as a function of the size of the colloidal particle. The reflectance peak position predicted from the model based on Bruggeman and Maxwell-Garnett effective medium approximations agrees well with those of the experimentally observed peak.
Bibliographical noteFunding Information:
One of the authors (M.P.) would like to thank Auburn University and the United States Department of Agriculture for partial support for this project. The work carried out at Yonsei University was supported by Grant No. R01-2002-000-00318-0 and the National Research Laboratory, both from the Korea Science and Engineering Foundation.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)