Study on Sub-THz Signal Input for Superconducting Electronic Devices

Iwao KAWAYAMA; Yasushi DODA; Ryuhei KINJO; Toshihiko KIWA; Hironaru MURAKAMI; Masayoshi TONOUCHI

doi:10.1093/ietele/e90-c.3.588

Study on Sub-THz Signal Input for Superconducting Electronic Devices

Iwao KAWAYAMA, Yasushi DODA, Ryuhei KINJO, Toshihiko KIWA, Hironaru MURAKAMI, Masayoshi TONOUCHI

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Development of ultrafast optical interfaces that can operate in sub-terahertz region is important to apply superconducting electronic devices to the high-end systems. We have performed several fundamental researches to realize the ultrafast optical input interface for superconducting electronic devices. Firstly, we observed optical response of amorphous Ge thin films, and the results indicated that an amorphous Ge photoconductive switch could stably operate in a terahertz frequency range as an optical-to-electrical signal converter in the low-temperature region below T_c of YBCO. Next, we have fabricated optical-to-electrical signal conversion system with photomixing technique, and we have demonstrated the generation and the detection of high frequency signals over 50 GHz. Finally, we have observed optical responses of a Josephson vortex flow transistor under irradiation of femtosecond laser pulses, and the results suggeste that the device has high potential as an optical interface.

Publication: IEICE TRANSACTIONS on Electronics Vol.E90-C No.3 pp.588-594

Publication Date: 2007/03/01

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Online ISSN: 1745-1353

DOI: 10.1093/ietele/e90-c.3.588

Type of Manuscript: Special Section INVITED PAPER (Special Section on Innovative Superconducting Devices and Their Applications)

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Iwao KAWAYAMA, Yasushi DODA, Ryuhei KINJO, Toshihiko KIWA, Hironaru MURAKAMI, Masayoshi TONOUCHI, "Study on Sub-THz Signal Input for Superconducting Electronic Devices" in IEICE TRANSACTIONS on Electronics, vol. E90-C, no. 3, pp. 588-594, March 2007, doi: 10.1093/ietele/e90-c.3.588.
Abstract: Development of ultrafast optical interfaces that can operate in sub-terahertz region is important to apply superconducting electronic devices to the high-end systems. We have performed several fundamental researches to realize the ultrafast optical input interface for superconducting electronic devices. Firstly, we observed optical response of amorphous Ge thin films, and the results indicated that an amorphous Ge photoconductive switch could stably operate in a terahertz frequency range as an optical-to-electrical signal converter in the low-temperature region below T_c of YBCO. Next, we have fabricated optical-to-electrical signal conversion system with photomixing technique, and we have demonstrated the generation and the detection of high frequency signals over 50 GHz. Finally, we have observed optical responses of a Josephson vortex flow transistor under irradiation of femtosecond laser pulses, and the results suggeste that the device has high potential as an optical interface.
URL: https://global.ieice.org/en_transactions/electronics/10.1093/ietele/e90-c.3.588/_p

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@ARTICLE{e90-c_3_588,
author={Iwao KAWAYAMA, Yasushi DODA, Ryuhei KINJO, Toshihiko KIWA, Hironaru MURAKAMI, Masayoshi TONOUCHI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Study on Sub-THz Signal Input for Superconducting Electronic Devices},
year={2007},
volume={E90-C},
number={3},
pages={588-594},
abstract={Development of ultrafast optical interfaces that can operate in sub-terahertz region is important to apply superconducting electronic devices to the high-end systems. We have performed several fundamental researches to realize the ultrafast optical input interface for superconducting electronic devices. Firstly, we observed optical response of amorphous Ge thin films, and the results indicated that an amorphous Ge photoconductive switch could stably operate in a terahertz frequency range as an optical-to-electrical signal converter in the low-temperature region below T_c of YBCO. Next, we have fabricated optical-to-electrical signal conversion system with photomixing technique, and we have demonstrated the generation and the detection of high frequency signals over 50 GHz. Finally, we have observed optical responses of a Josephson vortex flow transistor under irradiation of femtosecond laser pulses, and the results suggeste that the device has high potential as an optical interface.},
keywords={},
doi={10.1093/ietele/e90-c.3.588},
ISSN={1745-1353},
month={March},}

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TY - JOUR
TI - Study on Sub-THz Signal Input for Superconducting Electronic Devices
T2 - IEICE TRANSACTIONS on Electronics
SP - 588
EP - 594
AU - Iwao KAWAYAMA
AU - Yasushi DODA
AU - Ryuhei KINJO
AU - Toshihiko KIWA
AU - Hironaru MURAKAMI
AU - Masayoshi TONOUCHI
PY - 2007
DO - 10.1093/ietele/e90-c.3.588
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E90-C
IS - 3
JA - IEICE TRANSACTIONS on Electronics
Y1 - March 2007
AB - Development of ultrafast optical interfaces that can operate in sub-terahertz region is important to apply superconducting electronic devices to the high-end systems. We have performed several fundamental researches to realize the ultrafast optical input interface for superconducting electronic devices. Firstly, we observed optical response of amorphous Ge thin films, and the results indicated that an amorphous Ge photoconductive switch could stably operate in a terahertz frequency range as an optical-to-electrical signal converter in the low-temperature region below T_c of YBCO. Next, we have fabricated optical-to-electrical signal conversion system with photomixing technique, and we have demonstrated the generation and the detection of high frequency signals over 50 GHz. Finally, we have observed optical responses of a Josephson vortex flow transistor under irradiation of femtosecond laser pulses, and the results suggeste that the device has high potential as an optical interface.
ER -