Spontaneous emission can be totally suppressed or strongly enhanced depending on the relative position of the resonant frequency from the edge of the photonic band gap and the photonic mode density.
The electromagnetic band-gap (EBG) materials is used to design the aperture coupled patch antennas, and both high permittivity and low permittivity materials are considered in this paper.
3
当你注视某块屏幕时,你头上所带的电极帽将会监测到你大脑视皮层所发出的那个相对应的频率。
If you stare at one quadrant, your visual cortex will emit a corresponding frequency, which is detected by an electrode cap covering your head.