CdSe柱狀結構二維光子晶體的製作及光學性質
Fabrication and Optical Properties of 2D Photonic Crystals of CdSe Pillars
Date Issued
2004
Date
2004
Author(s)
Chuang, Lu-Meng
DOI
en-US
Abstract
This thesis concerns with the fabrication and optical properties of two-dimensional photonic crystals of CdSe pillars. The combination of electron beam lithography and electrochemistry deposition methods has been employed to fabricate sub-micrometer scale CdSe pillars. The optical properties of CdSe pillars are characterized by micro- photoluminescence (µ-PL).
The formation of the wurtzite crystal structure of CdSe has been confirmed by Raman spectra. Quite interestingly, in the study on optical properties, we found that the intensity of micro-photoluminescence (µ-PL) can be greatly enhanced at a particular structure of photonic crystals. This peculiar phenomenon can be explained quite well in terms of the effects of photonic crystals. PCs can provide a photonic band gap in the lateral dimensions so that the emission of CdSe pillars can not propagate in the lateral plane and can only propagate upward with respect to the photonic crystal. Thus, the detected PL intensity normal to the lateral plane is enhanced.
The combination of electron beam lithography and electrochemical deposition technique provides a simple and low cost method to grow sub-micro meter scales structures. We therefore demonstrate an alternative method to fabricate high efficiency of luminescent optical device.
Subjects
光子晶體
photonic crystals
Type
thesis
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