Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 52, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/JJAP.52.100210
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- Japan Science and Technology Agency, Japan
- Ministry of Internal Affairs and Communications
- Grants-in-Aid for Scientific Research [24560398, 21226010] Funding Source: KAKEN
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Terahertz (THz) emission from resonant tunneling diodes (RTDs) is normally obtained under the oscillation condition in which the negative differential conductance (NDC) exceeds the circuit loss. In this study, we show that a relatively broad band THz emission was observed even for RTDs with an NDC smaller than the circuit loss. The observed output power was on the order of 1-10 nW at 1.2-1.9 THz with spectral widths of 50-100 GHz. The observation was reasonably explained by the theoretical calculation based on the shot noise amplified by the NDC. This emission corresponds to the amplified spontaneous emission in optical devices. (C) 2013 The Japan Society of Applied Physics
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