Abstract
The microwave-based liquid sensors are indispensable techniques which can provide many advantages such as low cost, real time and label free for biological or chemical measurements. Metamaterials are well suitable for sensing applications due to the narrow spectral feature. However, substantial losses in metamaterials have restricted the development of sensitive sensing devices. By introducing a gain medium, the improved performance of the metamaterials can be achieved at optical frequencies. By directly incorporating a sub-wavelength amplifier chip into the spoof plasmonic resonator, the quality (Q) factor of the passive resonator can be significantly increased. Kinds of active plasmonic sensors have been introduced here.
Published Version
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