Title :
Impact of the absorption in transmittance and reflectance on macroporous silicon photonic crystals
Author :
Cardador, David ; Vega, Didac ; Rodriguez, Angel
Author_Institution :
Dept. d´Eng. Electron., Univ. Politec. de Catalunya (UPC), Barcelona, Spain
Abstract :
The characteristics of reflection and transmission peaks in the spectra of photonic crystals have been studied theoretically and the results compared to measurements performed in fabricated samples. The aim of this work is to investigate the relation between material losses and the effective Q factors that can be obtained in photonic crystals made with it. Photonic crystals have been designed with defects of periodicity to introduce states in the band gap that give place to reflectance and transmittance peaks at adjustable specific wavelengths. The fabricated structures are described together with their reflection and transmission spectra. The influence of losses in the material in these spectra is evaluated.
Keywords :
Q-factor; elemental semiconductors; energy gap; infrared spectra; photonic crystals; porous semiconductors; reflectivity; silicon; visible spectra; Q factors; Si; band gap; macroporous silicon photonic crystals; material losses; reflectance spectra; transmittance spectra; Absorption; Fabrication; Optical losses; Photonic crystals; Q-factor; Reflection; Silicon; Q factor; absorption; electrochemical etching; extinction coefficient; macroporous silicon; photonic crystal;
Conference_Titel :
Electron Devices (CDE), 2015 10th Spanish Conference on
Conference_Location :
Madrid
DOI :
10.1109/CDE.2015.7087479
