Shaping the waves

Polarization shaping of few-cycle terahertz waves.

We present a polarization shaping technique for few-cycle terahertz (THz) waves. For this, N femtosecond laser pulses are generated from a devised diffractive optical system made of as-many glass wedges, which then simultaneously illuminate on various angular positions of a sub-wavelength circular pattern of an indium arsenide thin film, to produce a THz wave of tailor-made polarization state g...

Thalamus and cortex: inseparable partners in shaping sleep slow waves?

Editor's Note: These short, critical reviews of recent papers in the Journal, written exclusively by graduate students or postdoctoral fellows, are intended to summarize the important findings of the paper and provide additional insight and commentary. For more information on the format and purpose of the Journal Club, please see Review of Lemieux et al. Sleep slow waves have gained increasing ...

Path Shaping: Shaping 3D Path of Electromagnetic Waves Using Gradient‐Refractive‐Index Metamaterials (Adv. Sci. 8/2016)

Shaping 3D Path of Electromagnetic Waves Using Gradient‐Refractive‐Index Metamaterials

An all-dielectric semispherical lens with functions in shaping 3D wave-propagation paths is proposed and experimentally verified. When radiation sources are placed in the central region, the lens behaves as a magnifying device to resolve the sources in subwavelength scale; while when the electromagnetic waves impinge on the semispherical lens from outside, they will be guided spirally inward.

Shaping the Future:

* The views expressed in this paper are those of the authors and do not necessarily reflect the views or policies of the Asian Development Bank or its Board of Governors or the governments they represent.