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conductive channel for Energy Transmission

Journal of Energy and Power Engineering 2015年第9期9卷 813-829页

作者： Victor Victorovich Apollonov A. M. Prokhorov General Physics Institute Russian Academy of Sciences Moscow 119991 Russia

Laser spark obtained by using a conical optics is much more appropriate to form conducting channels in atmosphere. Only two types of lasers are actively considered to be used in forming high-conductivity channels in atmosphere, controlled by laser spark： pulsed sub-microsecond gas and chemical lasers （CO2, DF （deuterium fluoride））, short pulse solid-state and UV （ultraviolet） lasers. Main advantage of short pulse lasers is their ability in forming of super long ionized channels with a characteristic diameter of- 100 mm in atmosphere along the beam propagation direction. At estimated electron densities below 1,016 cm3 in these filaments and laser wavelengths in the range of 0.5-1.0 mm, the plasma barely absorbs laser radiation. In this case, the length of the track composed of many filaments is determined by the laser intensity and may reach many kilometers at a femtosecond pulse energy of-100 mJ. However, these lasers could not be used to form high-conductivity long channels in atmosphere. The ohmic resistance of this type a conducting channels turned out to be very high, and the gas in the channels could not be strongly heated （〈 1 J）. An electric breakdown controlled by radiation of femtosecond solid-state laser was implemented in only at a length of 3 m with a voltage of 2 MV across the discharge gap （670 kV/m）. Not so long ago scientific group from P.N. Lebedev physical institute has improved that result, the discharge gap （-1m） had been broken under KrF laser irradiation when switching high-voltage （up to 390 kV/m） electric discharge by 100-ns UV pulses. Our previous result -16 m long conducting channel controlled by a laser spark at the voltage -3 MV was obtained more than 20 years ago in Russia and Japan by using pulsed CO2 laser with energy -0.5 kJ. An average electric field strength was 〈 190 kV/m. It is still too much for efficient applications.

关键词： Laser exploding wire conductive channel laser spark electric discharge pulse-periodic laser energy transmission.

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Emerging of two-dimensional materials in novel memristor

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Frontiers of physics 2022年第2期17卷 107-120页

作者： Zhican Zhou Fengyou Yang Shu Wang Lei Wang Xiaofeng Wang Cong Wang Yong Xie Qian Liu MOE Key Laboratory of Weak-Light Nonlinear Photonics Department of PhysicsNankai UniversityTianjin 300071China CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyUniversity of Chinese Academy of SciencesBeijing 100190China College of Mathematics and Physics Shandong Advanced Optoelectronic Materials and Technologies Engineering LaboratoryQingdao University of Science and TechnologyQingdao 266061China College of Mathematics and Physics Beijing University of Chemical TechnologyBeijing 100029China School of Physics Beihang UniversityBeijing 100191China

The rapid development of big-data analytics(BDA),internet of things(IoT)and artificial intelligent Technology(AI)demand outstanding electronic devices and systems with faster processing speed,lower power consumption,and smarter computer ***,as a promising Non-Volatile Memory(NVM)device,can effectively mimic biological synapse,and has been widely studied in recent *** appearance and development of two-dimensional materials(2D material)accelerate and boost the progress of memristor systems owing to a bunch of the particularity of 2D material compared to conventional transition metal oxides(TMOs),therefore,2D material-based memristors are called as new-generation intelligent *** this review,the memristive(resistive switching)phenomena and the development of new-generation memristors are demonstrated involving graphene(GR),transition-metal dichalcogenides(TMDs)and hexagonal boron nitride(h-BN)based ***,the related progress of memristive mechanisms is remarked.

关键词： memristor resistive switching 2D material switching mechanism conductive channel

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