Efficient generation and guiding of megaampere relativistic electron current by silicon nanowires

Singh, Prashant Kumar and Chatterjee, Gourab and Lad, AmitD and Adak, Amitava and Ahmed, Saima and Khorasaninejad, M. and Adachi, MM and Karim, KS and Saini, SS and Sood, AK and Kumar, GRavindra (2012) Efficient generation and guiding of megaampere relativistic electron current by silicon nanowires. In: APPLIED PHYSICS LETTERS, 100 (24).

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Abstract

We demonstrate 30 times enhanced flux of relativistic electrons by a silicon nanowire coated target excited by 30 fs, 800 nm laser pulses at an intensity of 3 x 10(18) W cm(-2). A measurement of the megaampere electron current via induced megagauss magnetic field supports the enhancement feature observed in the electron energy spectrum. The relativistic electrons generated at the front of nanowire coated surface are shown to travel efficiently over 500 mu m in the insulating substrate. The enhanced hot electron temperature is explained using a simple model and is supported by recent simulations. (C) 2012 American Institute of Physics. http://dx.doi.org/10.1063/1.4729010]

Item Type:	Journal Article
Publication:	APPLIED PHYSICS LETTERS
Publisher:	AMER INST PHYSICS
Additional Information:	Copy right for this article belongs to AMER INST PHYSICS
Keywords:	LASER;INTENSITY;TRANSPORT;PLASMA;SPECTRA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	18 Jul 2012 11:50
Last Modified:	18 Jul 2012 11:50
URI:	http://eprints.iisc.ac.in/id/eprint/44800

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