Gundareva I., Pavlovskiy V., Divin Y. High-Tc Josephson junctions as quasiclassical THz detectors. IEEE Trans. Appl. Supercond. , 2018 , 28 (4). 1800105-5p.
Полный текст не доступен из этого репозитория.Аннотация
[100]-tilt YBa2Cu3O7−x bicrystal Josephson junctions (JJs) with resistances Rn = (50–500) Ω and characteristic voltages IcRn (50 K) of 2.5 mV have been fabricated and their potential as classical terahertz detectors has been evaluated. The dc I–V curves of the JJs at temperatures T above 40 K have been found free of hysteresis and demonstrated high nonlinearity with the second derivatives d2V/dI2 up to 107–108 Ω/A at T = 50 K. The response ΔV(I) at the current I corresponding to the maximum of d2V/dI2 has been observed in a power range of more than four orders of magnitude, and ΔV is directly proportional to the incident power P (square-law detection) at low power, then ΔV ∼ P1/2 (linear detection) at higher power. The responses ΔV(V) at low voltages V to external radiation with the frequencies from 0.05 to 3 THz have been experimentally found to be proportional to d2V/dI2 (classical detection) at low frequencies and to dV/dI (Josephson detection) at high frequencies with a crossover near the low-frequency limit fl = (0.9 ± 0.3) THz of the ac Josephson effect in our JJs. Numerical simulations of such quasiclassical detector with Rn = 300 Ω at T = 50 K predict the NEP-values of 5·10−15 W/Hz1/2 at the frequencies up to 1 THz.
| Тип объекта: | Статья |
|---|---|
| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | И.И. Гундарева, В.В. Павловский, Ю.Я. Дивин |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 183 лаб. фотоэлектронных явлений |
| URI: | http://cplire.ru:8080/id/eprint/4911 |
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