Pavlovskiy V.V., Gundareva I. I., Volkov O. Y., Divin Y. Y. Wideband detection of electromagnetic signals by high-Tc Josephson junctions with comparable Josephson and thermal energies. Applied Physics Letters , 2020 , 116. 082601. ISSN 0003-6951
Полный текст не доступен из этого репозитория.Аннотация
Detection mechanisms in Josephson junctions with energies Ej comparable to thermal energies kT have been studied. The responses DV of YBa2Cu3O7-x bicrystal junctions to monochromatic radiation with frequencies f ranging from 94 GHz to 3.1 THz can be described in terms of classical rectification on a static nonlinear V–I curve at low frequencies and frequency modulation of the ac Josephson current at high frequencies, with an interplay between these mechanisms at intermediate frequencies. An electrical noise-equivalent power of (9+/-3)x10^-15 W/Hz^1/2, a responsivity of (3.4+/-0.5)x10^5 V/W, and a dynamic power range of 5x10^4 have been demonstrated for the square-law classical detection of 94 GHz radiation with the junctions at 50 K. The effect of background radiation on the V–I curves of YBa2Cu3O7-x bicrystal junctions was found to have an optical noise-equivalent temperature of <30 mK/Hz^1/2. The main contribution to the effect comes from the interplay between the classical and Josephson detection mechanisms. The spectral and power dependencies of the responses DV of Josephson junctions have been numerically simulated within the resistively shunted junction model at various values of kT/Ej, and the results are in acceptable agreement with the experimental data.
| Тип объекта: | Статья |
|---|---|
| Авторы на русском. ОБЯЗАТЕЛЬНО ДЛЯ АНГЛОЯЗЫЧНЫХ ПУБЛИКАЦИЙ!: | Павловский В.В., Гундарева И.И., Волков О.В., Дивин Ю.Ю. |
| Подразделения (можно выбрать несколько, удерживая Ctrl): | 183 лаб. фотоэлектронных явлений |
| URI: | http://cplire.ru:8080/id/eprint/8290 |
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