To work as a sensor, Q factor of metamaterial absorber should be Low high both a and b none of these

Analyzing the Question

1. Understanding the Q Factor: The Q factor (quality factor) is a dimensionless parameter that describes the damping of an oscillator or resonator. In the context of metamaterials, a low Q factor typically signifies broad resonance, which can be beneficial for applications like sensors. In contrast, a high Q factor signifies a sharp resonance, which does not typically suit sensing applications.

2. Application to Metamaterials: For metamaterial absorbers that are intended to function effectively as sensors, a low Q factor is generally desirable because it allows for a wider bandwidth and enhanced sensitivity to incoming signals.

Conclusion

Given the explanation of the Q factor in the context of metamaterials and sensing applications:

• The answer to whether the Q factor of a metamaterial absorber should be low or high is Low.

Thus, the correct choice is a (Low).