Photonic Terahertz-Wave Generation Using Slot-Antenna-Integrated Uni-Traveling-Carrier Photodiodes

被引：21

作者：

Ito, Hiroshi ^{[1
,2
]}

Ishibashi, Tadao ^{[3
]}

机构：

[1] Kitasato Univ, Ctr Nat Sci, Sagamihara, Kanagawa 2520373, Japan

[2] Kitasato Univ, Grad Sch Med Sci, Sagamihara, Kanagawa 2520373, Japan

[3] NTT Elect Techno Corp, Atsugi, Kanagawa 2430198, Japan

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2017年 / 23卷 / 04期

基金：

日本科学技术振兴机构;

关键词：

Photodiode (PD); uni-traveling-carrier photodiode (UTC-PD); terahertz (THz); photomixer; slot antenna; LOG-PERIODIC ANTENNAS; HIGH-SPEED;

D O I：

10.1109/JSTQE.2017.2657678

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Widely frequency-tunable terahertz-wave generation with enhanced output power was investigated using slot-antenna-integrated uni-traveling-carrier photodiodes (UTC-PDs). Based on numerical analysis, the optimum antenna configuration for simultaneously attaining increased output power and relatively broad bandwidth was determined. Slot-antenna-integrated UTC-PDs (short- and long-slot) and a broadband bowtie-antenna-integrated UTC-PD were fabricated and analyzed by comparing their characteristics. The slot-antenna-integrated UTC-PDs exhibited two to three times larger output power at their resonant peak frequencies than that of the bowtie-antenna-integrated UTC-PD. Output power enhancement was attained at frequencies from 900 GHz to 1.6 THz for the short-slot device and from 350 to 850 GHz for the long-slot device, and these characteristics were in good agreement with the numerical analysis. The typical output power obtained was 3.5 mu Wfor the short-slot device at 1.25 THz and 28 mu W for the long-slot device at 700 GHz both for a photocurrent of 10 mA with a bias voltage of -0.4 V.

引用

页数：7

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