| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 8, 2013
|
|
|---|---|---|
| Article Number | 13023 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.2971/jeos.2013.13023 | |
| Published online | 17 March 2013 | |
Regular papers
Theoretical demonstration of highly efficient cw THz generation by using composite photonic-structure elements
1
Department of Physics and Electronics, Osaka Prefecture University 1-1 Gekuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
2
Industrial Materials and Process Technology R&D Laboratories, Sumitomo Electric Industries, Ltd.1-1-1, Koyakita, Itami-shi, Hyogo 664-0016, Japan
* a-oyamada@pe.osakafu-u.ac.jp
Received:
21
January
2013
We theoretically propose one-dimensional composite photonic structures for high-resolution THz spectroanalysis. We compare the performance of two GaAs/AlAs composite photonic-structure devices, one with usual 1/4-wavelength layers of distributed Bragg reflectors (DBRs), and the other with the designed DBRs. The device with designed DBRs shows the optical-to-terahertz conversion efficiency up to 10−5 and wide frequency tunability ranging from sub-THz to 3 THz. We found that the composite photonic structure allows us to control photonic modes with a high degree of freedom by flexible structure designs. This device achieve a cw THz source with a highly narrow bandwidth operating at room temperature.
Key words: THz generation / one-dimensional photonic crystal / difference frequency generation
© The Author(s) 2013. All rights reserved.
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