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Spaser () is a phenomenon that was first described by Bergman and Stockman in 2003.〔(Surface Plasmon Amplification by Stimulated Emission of Radiation: Quantum Generation of Coherent Surface Plasmons in Nanosystems ), David J. Bergman and Mark I. Stockman, ''Phys. Rev. Lett. 90, 027402 (2003)''〕 The name is an acronym for ''surface plasmon amplification by stimulated emission of radiation''. The first such device was announced in August 2009, a 44-nanometer-diameter nanoparticle with a gold core surrounded by a dyed silica gain medium, created by researchers from Purdue, Norfolk State and Cornell universities.〔(The Smallest Laser Ever Made ), Katherine Bourzac, ''MIT Technology Review'', August 17, 2009〕 The spaser is a proposed nanoscale source of optical fields that is being investigated in a number of leading laboratories around the world. If realized, spasers could find a wide range of applications, including nanoscale lithography, probing and microscopy. From ''Nature Photonics'':〔(Spasers explained ), Mark I. Stockman, ''Nature Photonics, 2, June, 327, (2008)''〕 Study of the quantum mechanical model of the spaser suggests that it should be possible to manufacture a spasing device analogous in function to the MOSFET transistor,〔(Spaser as Nanoscale Quantum Generator and Ultrafast Amplifier ), Mark I. Stockman, ''arXiv.org > Condensed Matter > Mesoscale and Nanoscale Physics, submitted 25 Aug 2009''〕 but this has not yet been experimentally verified. Nano-optics is now undergoing a period of explosive growth where new ideas, developments and impressive results appear literally on a daily basis. It is concerned with the science of concentrating optical energy into regions with subwavelength dimensions (typically tens of nanometres). ==See also== *List of plasma (physics) articles 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Spaser」の詳細全文を読む スポンサード リンク
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