Yang-Hua CHANG, Chi-Chung LIU¹, and Chien-Jang WU^2*

Department of Electronic Engineering, National Yunlin University of Science and Technology, Yunlin 640, Taiwan
¹Department of Electro-Optics Engineering, National Formosa University, Yunlin 632, Taiwan
²Institute of Electro-Optical Science and Technology, National Taiwan Normal University, Taipei 116, Taiwan

(Received June 6, 2010; Accepted July 30, 2010)

By using a photonic quantum well (PQW) as a tunable defect layer, a theoretical analysis on the optical properties in a multilayer narrowband reflection-and-transmission filter can be given. It is found that the resonant peaks in the reflection and transmission spectra are shifted to shorter wavelengths as the number of periods in the PQW increases. The shifting feature is more salient if the QW is deeper, that is, the refractive index contrast in the constituents of the PQW is increased. This novel design provides an alternative for achieving a tunable filter instead of using the usual electrooptical defect.

Key words: photonic quantum well, narrowband filter, tunable defect, multilayer, transfer matrix method

^*E-mail address: jasperwu@ntnu.edu.tw