Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/22824
Title: Strontium titanate/silicon-based terahertz photonic crystal multilayer stack
Authors: Xin, JZ
Jim, KL
Yang, J
Gong, XJ
Chen, LQ
Gao, F
Tsang, YH 
Chan, HLW 
Leung, CW 
Issue Date: 2012
Publisher: Springer
Source: Applied physics. A, Materials science & processing, 2012, v. 107, no. 1, p. 109-115 How to cite?
Journal: Applied physics. A, Materials science & processing 
Abstract: A one-dimensional photonic crystal working in the terahertz (THz) range was designed and implemented. To facilitate the design, the transmission properties of strontium titanate crystals were characterized by THz-time-domain spectroscopy. Relatively high refractive index (∼18.5) and transmission ratio (0.08) were observed between 0.2 to 1 THz. A stacked structure of (Si d Si/STO d STO) N /Si d Si was then designed, with transmission spectra calculated by the transfer matrix method. The effects of the filling ratio (d STO/(d Si+d STO)), periodicity (d Si+d STO) and the number of repeats N on the transmission of PC were investigated. The effect of introducing a defect layer was also studied. Based on these, Si/STO multilayers with STO defect thickness of 125 μm and 200 μm were measured. The shift of the defect mode was observed and compared with the calculations.
URI: http://hdl.handle.net/10397/22824
ISSN: 0947-8396
EISSN: 1432-0630
DOI: 10.1007/s00339-011-6743-z
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