TY - GEN
T1 - Design of omnidirectional reflector air-waveguide
AU - Chen, Chii Chang
AU - Luan, Pi Gang
AU - Chang, Jenq Yang
AU - Lee, Hsiao Wen
N1 - Publisher Copyright:
© 2003 IEEE.
PY - 2003
Y1 - 2003
N2 - In this paper, we study the structure of air-waveguide surrounded by omnidirectional reflectors for both vertical and horizontal confinements. The structure is designed for the fabrication processes using GaAs-based materials and their oxides with which the omnidirectional reflectors have been demonstrated elsewhere. The vertical and horizontal confinements are achieved by the omnidirectional reflectors consisting of AlGaAs/AlGaAs -oxide multilayers and AlGaAs/air multilayers, respectively. Due to large index difference between GaAs (n=3.53) and AlAs-oxide (n=1.56), large photonic band gap can be obtained. In our design, AlGaAs (n=3.2) and AlGaAs-oxide (n=2.2) are used as the materials for growth of multilayers. The band structure of the omnidirectional reflector is calculated by transfer matrix method. For the AlGaAs/air multilayers, with the thickness ratio of the AlGaAs/air multilayers to be 40%/60%, the normalized band gap that is in the range between 0.18 to 0.34 and 0.45 to 0.62 exists only for the TE mode. With a pulsed input light of the wavelength at 1.55 μm launched at the position of z=0, the entrance of the air-waveguide, the propagation loss is calculated. The minimum propagation loss is 0.23 dB/μm for the wavelength at 1.596 μm. By tuning the structure of the omnidirectional reflector and the air-waveguide, for example by increasing the period of the multilayers, the propagation loss can still be decreased.
AB - In this paper, we study the structure of air-waveguide surrounded by omnidirectional reflectors for both vertical and horizontal confinements. The structure is designed for the fabrication processes using GaAs-based materials and their oxides with which the omnidirectional reflectors have been demonstrated elsewhere. The vertical and horizontal confinements are achieved by the omnidirectional reflectors consisting of AlGaAs/AlGaAs -oxide multilayers and AlGaAs/air multilayers, respectively. Due to large index difference between GaAs (n=3.53) and AlAs-oxide (n=1.56), large photonic band gap can be obtained. In our design, AlGaAs (n=3.2) and AlGaAs-oxide (n=2.2) are used as the materials for growth of multilayers. The band structure of the omnidirectional reflector is calculated by transfer matrix method. For the AlGaAs/air multilayers, with the thickness ratio of the AlGaAs/air multilayers to be 40%/60%, the normalized band gap that is in the range between 0.18 to 0.34 and 0.45 to 0.62 exists only for the TE mode. With a pulsed input light of the wavelength at 1.55 μm launched at the position of z=0, the entrance of the air-waveguide, the propagation loss is calculated. The minimum propagation loss is 0.23 dB/μm for the wavelength at 1.596 μm. By tuning the structure of the omnidirectional reflector and the air-waveguide, for example by increasing the period of the multilayers, the propagation loss can still be decreased.
UR - http://www.scopus.com/inward/record.url?scp=84894024364&partnerID=8YFLogxK
U2 - 10.1109/CLEOPR.2003.1277157
DO - 10.1109/CLEOPR.2003.1277157
M3 - 會議論文篇章
AN - SCOPUS:84894024364
T3 - Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest
SP - 610
BT - CLEO/Pacific Rim 2003 - 5th Pacific Rim Conference on Lasers and Electro-Optics
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 5th Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 2003
Y2 - 15 December 2003 through 19 December 2003
ER -