Planar inverse anapole microresonator and performing inductive-detection electron paramagnetic resonance spectroscopy

A planar inverse anapole microresonator comprising:

• an anapolic substrate;
• an anapolic conductor disposed on the anapolic substrate and comprising a first inverse anapolic pattern and a second inverse anapolic pattern arranged such that the second inverse anapolic pattern is disposed in a plane with the first inverse anapolic pattern and opposes the first inverse anapolic pattern;
• each inverse anapolic pattern comprising:
• a semi annular arm that terminates in a first arm tendril and a second arm tendril distal to the first arm tendril;
• and
• a medial arm extending from a concave portion of the semi annular arm and terminating at a medial tip distal to the concave portion of the semi annular arm so that the medial tip is separated from the first arm tendril and the second arm tendril and medially disposed between the first arm tendril and the second arm tendril, such that:
• the first arm tendril of the first inverse anapolic pattern opposes the first arm tendril of the second inverse anapolic pattern;
• the second arm tendril of the first inverse anapolic pattern opposes the second arm tendril of the second inverse anapolic pattern;
• and
• the medial tip of the first inverse anapolic pattern opposes the medial tip of the second inverse anapolic pattern,
• such that the medial tip of the first inverse anapolic pattern is separated from the medial tip of the second inverse anapolic pattern by a medial gap, and the planar inverse anapole microresonator produces a magnetic field region that concentrates a magnetic field localized between the medial tip of the first inverse anapolic pattern and the medial tip of the second inverse anapolic pattern in response to the planar inverse anapole microresonator being subjected to microwave radiation.