TY - JOUR
T1 - Infrared tunable multichannel filter in a doped semiconductor-dielectric photonic crystal heterostructure
AU - Hung, Hui Chuan
AU - Wu, Chien Jang
AU - Chang, Shoou Jinn
N1 - Funding Information:
Manuscript received September 22, 2011; revised December 14, 2011; accepted December 18, 2011. Date of publication December 22, 2011; date of current version February 3, 2012. This work was supported in part by the National Science Council of the Republic of China, Taiwan, under Grant NSC-100-2112-M-003-005-MY3, and by the National Taiwan Normal University under Grant NTNU100-D-01.
PY - 2012
Y1 - 2012
N2 - A design of near- to mid-infrared tunable multichannel filter (MCF) based on the doped semiconductor-dielectric photonic crystal (PC) heterostructure is proposed. Here, a strongly extrinsic semiconductor, n-type germanium nGe, is used as one of the constituent layers. The occurrence of multichannel feature originates from the negative-permittivity in the highly doped nGe. The existence of tunable feature is due to its concentration-dependent permittivity. It is of interest to find that, in such MCFs, the number of channels, i.e., the number of resonant transmission peaks, is directly related to the stack number, and these peaks are located within the pass band of the ideal host PC. The multiple channels are blueshifted as the impurity concentration increases. This design suggests an alternative of engineering the pass band for realizing an MCF instead of engineering photonic band gap in a PC containing photonic quantum well structure as a defect. Our analysis is made based on the transfer matrix method together with the Bloch theorem.
AB - A design of near- to mid-infrared tunable multichannel filter (MCF) based on the doped semiconductor-dielectric photonic crystal (PC) heterostructure is proposed. Here, a strongly extrinsic semiconductor, n-type germanium nGe, is used as one of the constituent layers. The occurrence of multichannel feature originates from the negative-permittivity in the highly doped nGe. The existence of tunable feature is due to its concentration-dependent permittivity. It is of interest to find that, in such MCFs, the number of channels, i.e., the number of resonant transmission peaks, is directly related to the stack number, and these peaks are located within the pass band of the ideal host PC. The multiple channels are blueshifted as the impurity concentration increases. This design suggests an alternative of engineering the pass band for realizing an MCF instead of engineering photonic band gap in a PC containing photonic quantum well structure as a defect. Our analysis is made based on the transfer matrix method together with the Bloch theorem.
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U2 - 10.1109/JQE.2011.2181157
DO - 10.1109/JQE.2011.2181157
M3 - Article
AN - SCOPUS:84863065967
SN - 0018-9197
VL - 48
SP - 361
EP - 366
JO - IEEE Journal of Quantum Electronics
JF - IEEE Journal of Quantum Electronics
IS - 3
M1 - 6111424
ER -