Photon-activated electron hopping in a single-electron trap enhanced by Josephson radiation
| Autor: | Behdad Jalali-Jafari, Sergey V. Lotkhov, Alexander B. Zorin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Josephson effect
Photon Physics and Astronomy (miscellaneous) Phonon FOS: Physical sciences 02 engineering and technology Type (model theory) 01 natural sciences law.invention Superconductivity (cond-mat.supr-con) law Condensed Matter::Superconductivity 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Absorption (logic) 010306 general physics Superconductivity Physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity 021001 nanoscience & nanotechnology SQUID Quasiparticle Atomic physics 0210 nano-technology |
| DOI: | 10.48550/arxiv.1602.02303 |
| Popis: | Using a Josephson junction interferometer (DC SQUID) as a microwave source for irradiating a single-electron trap, both devices fabricated on the same chip, we study the process of photon-assisted tunneling as an effective mechanism of single photon detection. High sensitivity down to a very small oscillation amplitude $v_{\rm J} \sim$ 10 nV$\ll E_{\rm act} \lesssim hf_{\rm J}$ and down to low photon absorption rates $\Gamma_{\rm ph} \sim$ (1--50)Hz, as well as a clear threshold type of operation with an activation energy $E_{\rm act} \sim$ 400 $\mu$eV, are demonstrated for the trap with respect to the microwave photons of frequency $f_{\rm J} \sim$ (100--200)GHz. Tunable generation is demonstrated with respect to the power and frequency of the microwave signal produced by the SQUID source biased within the subgap voltage range. A much weaker effect is observed at the higher junction voltages along the quasiparticle branch of the $I-V$ curve; this response mostly appears due to the recombination phonons. Comment: 4 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|