Title :
Terahetz homodyne spectroscopy system based silicon photonic integrated circuit
Author :
Song, H.-J. ; Kim, J.-Y. ; Nishi, Hidetaka ; Fukuda, Hiroshi ; Ajito, K.
Author_Institution :
NTT Device Technol. Labs., NTT Corp., Atsugi, Japan
Abstract :
We present a homodyne terahertz spectroscopy system consisting of a broadband uni-travelling carrier photodiode, photoconductive antenna, and silicon photonic integrated circuit for the homodyne detection. Millimeter-scale silicon photonic circuits greatly reduce the impact of the environment temperature fluctuations on coherency between probe and reference signals and enable reliable measurement of the phase information of samples under test at up to 1 THz.
Keywords :
elemental semiconductors; homodyne detection; integrated optics; light coherence; optical design techniques; optical testing; photodiodes; silicon; terahertz spectroscopy; terahertz wave spectra; Si; broadband unitravelling carrier photodiode; environment temperature fluctuations; millimeter-scale silicon photonic integrated circuit; optical coherency; optical testing; phase information measurement; photoconductive antenna; terahetz homodyne spectroscopy system; Permittivity; Permittivity measurement; Phase modulation; Silicon photonics; Spectroscopy; Temperature measurement; homodyne terahertz spectroscopy; silicon photonics; uni-travelling carrier photodiodes;
Conference_Titel :
Microwave Photonics (MWP) and the 2014 9th Asia-Pacific Microwave Photonics Conference (APMP), 2014 International Topical Meeting on
Conference_Location :
Sapporo
DOI :
10.1109/MWP.2014.6994575
