Quantum Metamaterials with Magnetic Response at Optical Frequencies

Area of Science:

• Quantum optics
• Metamaterials
• Nanophotonics

Background:

• Natural quantum emitters possess intrinsic electric dipole transitions.
• Achieving strong magnetic responses at optical frequencies is challenging.
• Controlling light-matter interactions at the nanoscale is crucial for quantum technologies.

Purpose of the Study:

• To propose novel quantum antennas and metamaterials with significant magnetic response at optical frequencies.
• To demonstrate the use of natural quantum emitters for creating optical magnetic functionalities.
• To explore applications in classical optics and quantum engineering.

Main Methods:

• Arranging natural quantum emitters (atoms, ions, etc.) at sub-wavelength distances.
• Utilizing the antisymmetric mode of an atomic dimer as a magnetic antenna.
• Designing metasurfaces composed of atomic bilayers, with and without cavities.

Main Results:

• An atomic dimer can act as a magnetic antenna, enhancing nearby magnetic transition decay rates by orders of magnitude.
• Metasurfaces composed of atomic bilayers can act as nearly perfect electric or magnetic mirrors by reflecting both electric and magnetic fields.
• The proposed structures exhibit strong magnetic responses at optical frequencies.

Conclusions:

• Novel quantum antennas and metamaterials with strong optical magnetic responses can be realized using natural quantum emitters.
• These metamaterials can be fabricated using current technologies, offering a pathway to advanced optical and quantum devices.
• The findings open new avenues for manipulating light at the quantum level for diverse applications.