n0_3sc said:
Resonance in susceptibility refers to the phenomenon where a material's response to an external electromagnetic field is enhanced when the frequency of the field matches the material's natural frequency. This results in a sharp increase in the material's susceptibility and can lead to various interesting effects such as absorption, emission, and amplification of the field.
Non-resonant susceptibility refers to the material's response to an external electromagnetic field when the frequency of the field does not match the material's natural frequency. In this case, the material's susceptibility is not enhanced and its response is typically weaker compared to resonance. Non-resonant susceptibility can still lead to interesting effects, such as scattering and polarization, but they are not as strong as those seen in resonance.
The resonant and non-resonant susceptibility of a material can be affected by various factors such as the material's composition, structure, and temperature. In general, materials with higher natural frequencies and stronger interactions between their atoms and the external field will exhibit higher susceptibility. Additionally, the presence of impurities or defects in the material can also affect its susceptibility.
The resonant and non-resonant susceptibility of a material can be measured using various techniques such as spectroscopy, ellipsometry, and polarimetry. These techniques involve exposing the material to an external electromagnetic field and measuring its response, which can then be used to calculate the material's susceptibility. The choice of technique depends on the specific properties of the material and the required accuracy of the measurement.
The study of resonant and non-resonant susceptibility has various applications in fields such as material science, optics, and electronics. In material science, it is used to characterize the properties of different materials and understand their behavior under external fields. In optics, it is used in the design of devices such as lasers and optical filters. In electronics, it is used in the development of components such as antennas and resonators. Additionally, it also has applications in medical imaging, energy harvesting, and many other areas.