Optimization of the optical pulse energy for switches based on thin films of high-Tc superconductors

• Autorzy: Waśkiewicz J.
• Języki publikacji: EN

Abstrakty

EN

This work proposes a method for lowering the energy of an optical impulse required to switch superconducting key elements, based on driving such components with the use of current and optical radiation impulses with varied lengths. The investigation was conducted with the aid of numerical modelling of the superconducting switching element response for a structure composed of a thin YBa2Cu3O7-x superconducting film deposited on a sapphire substrate (Al2O3) with a buffer layer composed of strontium titanate (SrTiO3). It was proven that thanks to the driving with control impulses of varied lengths, it is possible to switch such elements with 1.6-3.5 times lower energy of the optical impulse and the current slightly higher than the critical current, as compared to the switching mechanism using impulses of the same length.

Słowa kluczowe

EN

high Tc superconductors; optical switches; current-optical pulses; control characteristics

PL

przełącznik optyczny; nadprzewodnik wysokotemperaturowy; charakterystyka regulacyjna

• Wydawca: Polish Academy of Sciences, Committee of Electronics and Telecommunication
• Czasopismo: Electronics and Telecommunications Quarterly
• Rocznik: 2008
• Tom: Vol. 54, No 2
• Strony: 127--133
• Opis fizyczny: Bibliogr. 9 poz., wykr.

Twórcy

autor

Waśkiewicz J.

• Faculty of Electrical Engineering. Bialystok Technical University, ul. Wiejska 45 d, 15-351 Bialystok,

Bibliografia

• l. P. Bunyk, K. Likharev, D. Zinoviev: RSFQ technology: physics and devices, International Journal of High Speed Electronics, vol. 11, no 1, pp. 257-305, 2001.
• 2. G. Sabouret, C. Williams, R. Sobolewski: Resistive switching dynamics in current-biased YBa2Cu3O7-x microbridges excited by nanosecond electrical pulses, Phys. Rev. B, vol. 66, no 13, pp. 132501-1-4, 2002.
• 3. C. Williams, Y. Xu, R. Adam, M. Darula, O. Harnack, J. Scherbel, M. Siegel, F. A. Hegmann, R. Sobolewski: Ultrafast YBCO photodetector based on the kinetic-inductive process, IEEE Transactions on Applied Superconductivity, vol. 11, no 1, pt. 1, pp. 578-81, 2001.
• 4. J. Waskiewicz: Control mode optimization for superconductor switches driven by current-optical pulses, Proc. SPIE, vol. 5948, pp. 21.1-7, 2005.
• 5. A. V. Mezenov, Y. Vas'kevich: Model of current and optical conductivity switching in YBa2Cu3O7-x films, Technical Physics, vol. 44, no 10, pp.1198-202, 1999.
• 6. A. V. Mezenov, A. V. Yankevich, J. Waskiewicz: Modeling the electrical response of thin films of high-temperature superconductors to laser and current pulses, Journal of Optical Technology, vol. 66, no 8, pp. 749-754, 1999.
• 7. A. V. Mezenov, J. Waskiewicz: Modelling of electrical response of superconducting films to current and optical pulses, Proc. XV Symp. Electromagnetic Phenomena in nonlinear circuits (Liege), pp. 245-248, 1998.
• 8. J. Waskiewicz: Optimal control characteristics of superconductor switching elements driven by current and laser pulses, Proc. SPIE, vol. 6599, pp. 05.1-5, 2007.
• 9. J. Waskiewicz: Reasons of switch-off time decrease in superconductor switches with a buffer layer, Physica C, vol. 372-376, no 2, pp. 630-633, 2002.