【摘 要】
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In modern electronics and optoelectronics,hot electron behaviors are highly concerned,as they determine the performance limit of a device or system,like the associated thermal or power constraint of chips and the Shockley-Queisser limit for solar cell eff
【机 构】
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State Key Laboratory of Infrared Physics,Shanghai Institute of Technical Physics,Chinese Academy of
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In modern electronics and optoelectronics,hot electron behaviors are highly concerned,as they determine the performance limit of a device or system,like the associated thermal or power constraint of chips and the Shockley-Queisser limit for solar cell efficiency.To date,however,the manipulation of hot electrons has been mostly based on conceptual interpretations rather than a direct observation.The problem arises from a fundamental fact that energy-differential electrons are mixed up in real-space,making it hard to distinguish them from each other by standard measurements.Here we demonstrate a distinct approach to artificially(spatially) separate hot electrons from cold ones in semiconductor nanowire transistors,which thus offers a unique opportunity to observe and modulate electron occupied state,energy,mobility and even path.Such a process is accomplished through the scanning-photocurrent-microscopy measurements by activating the intervalley-scattering events and 1D charge-neutrality rule.Findings here may provide a new degree of freedom in manipulating non-equilibrium electrons for both electronic and optoelectronic applications.
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