Short electrical pulse generation using light-induced switching in high-Tc superconductors

Saulius Balevicius

doi:10.1117/12.417606

8 March 2001 Short electrical pulse generation using light-induced switching in high-Tc superconductors

Saulius Balevicius

Proceedings Volume 4318, Smart Optical Inorganic Structures and Devices; (2001) https://doi.org/10.1117/12.417606
Event: Advanced Optical Materials and Devices, 2000, Vilnius, United States

Abstract

This report demonstrates that optically triggered switches based on high T_c superconductor thin films can be used for the generation of sub-nanosecond rise time high-power pulses. Presented in this article are the experimental investigations of the light-induced switching dynamics in YBCO thin films biased by high-current nanosecond duration pulses. This research indicates that a high-power superconducting opto-electronic opening switch can operate in several regimes. The following transitions between the various states of the film are realized: superconducting to normal (S-N), super-conducting to mixed (S-M), low resistance mixed to high resistance mixed (M_LR-M_HR) and mixed to normal (M-N). When the superconductor is biased with a high current, the value of the light intensity needed for triggering the switch decreases by several times. The explanation of the main light-induced switching characteristics and their behavior is based on a model, which takes into account the simultaneous action of the light and the bias current on the superconducting film. The report also includes a discussion f the ultra-fast film damaging phenomenon which appears as a result of the dissipation of intense power during switching. Discussed is also how this process limits the highest amplitude of the generated pulse. The possible application of high-power superconducting opto-electronic switches for the creation of jitter free radar is also discussed.

Citation Download Citation

Saulius Balevicius "Short electrical pulse generation using light-induced switching in high-Tc superconductors", Proc. SPIE 4318, Smart Optical Inorganic Structures and Devices, (8 March 2001); https://doi.org/10.1117/12.417606

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KEYWORDS

Superconductors

Switching

Switches

Optoelectronics

Resistance

Thin films

Lawrencium

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