| Presentation | 2009-07-21 Numerical investigation of electromagnetic radiation from current-biased intrinsic Josephson junctions Takashi TACHIKI, Takashi UCHIDA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In order to investigate Terahertz radiation from Bi_2Sr_2CaCu_2O_<8+x> intrinsic Josephson Junctions under a bias current flow, we have performed a numerical simulation of radiation properties of junction stacks with two different sizes; a number of junctions and junction length. For the three junction stack with its length of 0.026λ_c,λ_c being the c-axis magnetic penetration depth, distinct voltage jumps indicating in-phase and out-of-phase cavity resonance of the Josephson plasma occurred in the return curve of an I-V characteristic, and a radiation power of emitting waves reached the maximum in a bias region corresponding to the in-phase resonance. Moreover, the emitting waves generated by the in-phase resonance exhibited monochromatic spectra, compared with those generated by the out-of-phase resonance. On the other hand, for the 50-junction stack with 0.321λ_c, the radiation power was significantly enhanced by the in-phase resonance, while the increase in power suppressed in bias regions corresponding to the out-of-phase resonances with the low plasma-velocity modes. The maximum power was approximately 150 higher than that of the three junction stack. These facts are useful for designing a Terahertz oscillator using the intrinsic Josephson junctions. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Bi_2Sr_2CaCu_2O_<8+x> / Intrinsic Josephson Junction / sine-Gordon equation / Terahertz wave |
| Paper # | SCE2009-10 |
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| Conference Information | |
| Committee | SCE |
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| Conference Date | 2009/7/14(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Superconductive Electronics (SCE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Numerical investigation of electromagnetic radiation from current-biased intrinsic Josephson junctions |
| Sub Title (in English) | |
| Keyword(1) | Bi_2Sr_2CaCu_2O_<8+x> |
| Keyword(2) | Intrinsic Josephson Junction |
| Keyword(3) | sine-Gordon equation |
| Keyword(4) | Terahertz wave |
| 1st Author's Name | Takashi TACHIKI |
| 1st Author's Affiliation | Department of Electrical and Electronic Engineering, National Defense Academy() |
| 2nd Author's Name | Takashi UCHIDA |
| 2nd Author's Affiliation | Department of Electrical and Electronic Engineering, National Defense Academy |
| Date | 2009-07-21 |
| Paper # | SCE2009-10 |
| Volume (vol) | vol.109 |
| Number (no) | 141 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |