Three-Dimensional Cloaking Device Operates at Terahertz Frequencies

Details Three-Dimensional Cloaking Device Operates at Terahertz Frequencies Three-Dimensional Cloaking Device Operates at Terahertz Frequencies

2010-03-17

arxiv.org/abs/1003.3441v1

Physics

Optics

Scientific paper

The invisibility cloak has been a long-standing dream for many researchers over the decades. By transforming space and light propagation, a three-dimensional (3D) object can be perceived as having reduced number of dimensions, in the form of points, lines, and thin sheets, making it "undetectable" judging from scattered field. Although a variety of cloaking devices have been reported at microwave and optical frequencies, the Terahertz (THz) domain remains unexplored. Moreover, it should be noted that all the previous experimental demonstrations are performed in a two-dimensional (2D) waveguide configuration. Although those works represent a critical step in validating the concept of the invisibility cloak, one would expect the cloaking device to be realized in 3D with the ability to cloak an object of realistic size. This requires the construction of an optically large cloaking device with features much smaller than the wavelength. Fabricating 3D structures with aspect ratio close to 100:1 is obviously a challenging task. Here, we report an experimental demonstration of a 3D THz ground plane cloak. Reflection terahertz time-domain spectroscopy (THz-TDS) was employed to characterize the cloaking samples. Two distinct reflection peaks can be clearly observed across a broad frequency range, which is caused by the reflection at the surface of the bump. The measured peak positions are consistent with the numerical simulation peak positions. By contrast, in the spectral map of the cloak sample, the wavefront is relatively smooth with a single peak.

Affiliated with

Also associated with

No associations

Rating

Three-Dimensional Cloaking Device Operates at Terahertz Frequencies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Three-Dimensional Cloaking Device Operates at Terahertz Frequencies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-Dimensional Cloaking Device Operates at Terahertz Frequencies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-234556