| Abstrak/Abstract |
Metamaterial is an artificial material which has a negative refractive index. Both of permitivitty and permeability have a negative value to possess negative refraction. The breakthrough of metamaterial development was present as the invention of chiral structure metamaterial, espescially as a terahertz (THz) source. THz emission was measured using a femtosecond Ti:Sapphire pumped terahertz emission spectroscopy system. The chiral metamaterial samples have physical size as follows: length 1,2 ?m, width 0,3 ?m, and depth 0,3 ?m. It has been produced dua chiral metamaterial samples, which are 300 periodic square pattern samples which consist of a clock-wise as a right-hand sample and a counter clock-wise as a left-hand sample. The all of samples were capable to generate a THz emission over a frequency range of 0 ? 2,24 THz. THz signal was occurred due to the optical rectification process as a result of an intense femtosecond laser pulses radiation on a chiral metamaterial sample. The experiment result showed that the relation between the pumping laser energy and the generated THz amplitude was a second-order function. It can be concluded that chiral metamaterial with different depth has been successfully generate elliptic polarized THz emission. |
