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arXiv 0712.3156physics.opticsphysics.class-ph
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远场干涉增强光和粒子波通过亚波长纳米孔的传输

Enhanced Transmission of Light and Particle Waves through Subwavelength Nanoapertures by Far-Field Interference

S. V. Kukhlevsky

摘要:

金属薄膜中的亚波长孔径阵列可以增强光和物质(原子)波的传输。这种现象依赖于金属表面等离子体波或物质波的共振激发和干涉。我们展示了一种新的机制,它可以提供一个伟大的共振和非共振传输增强的光或德布罗意粒子波通过孔径不是由表面波,而是由建设性的衍射波(由孔径产生的光束)在放置在远场区的检测器的干涉。与其他模型相比,该机制既不依赖于光束(连续波或脉冲)的性质(光或物质),也不依赖于多光束源(一维和二维亚波长孔径阵列,纤维,偶极子或原子)的材料和形状。光栅透射谱中的Wood反常现象是光学中一个长期存在的问题,它是由我们模型的干涉性质自然产生的。本文的创新点是对经典Young型双源系统中Wood异常的预测。这种新机制可以被解释为著名的迪克量子模型预测的亚波长原子系综的超辐射发射的非量子模拟(光功率和能量尺度为光源数量的平方,而不考虑周期性)。

英文摘要:

Subwavelength aperture arrays in thin metal films can enable enhanced transmission of light and matter (atom) waves. The phenomenon relies on resonant excitation and interference of the plasmon or matter waves on the metal surface. We show a new mechanism that could provide a great resonant and nonresonant transmission enhancement of the light or de Broglie particle waves passed through the apertures not by the surface waves, but by the constructive interference of diffracted waves (beams generated by the apertures) at the detector placed in the far-field zone. In contrast to other models, the mechanism depends neither on the nature (light or matter) of the beams (continuous waves or pulses) nor on material and shape of the multiple-beam source (arrays of 1-D and 2-D subwavelength apertures, fibers, dipoles or atoms). The Wood anomalies in transmission spectra of gratings, a long standing problem in optics, follow naturally from the interference properties of our model. The new point is the prediction of the Wood anomaly in a classical Young-type two-source system. The new mechanism could be interpreted as a non-quantum analog of the superradiance emission of a subwavelength ensemble of atoms (the light power and energy scales as the number of light-sources squared, regardless of periodicity) predicted by the well-known Dicke quantum model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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