Magnetic dipole absorption of light at intersubband transitions in quantum wells

Abstract

We consider theoretically magnetic dipole mechanism of the IR-light absorption at intersubband transitions in wide-gap quantum wells (QW). In contrast to the electric dipole resonance, discussed mechanism manifests in the interaction with the s-polarized component of electromagnetic radiation. We demonstrated that a) the frequencies of magnetic and electric dipole intersubband transitions in 2D layer are equal in the framework of one-particle approximation; b) collective plasma effects should lead to a significant frequency shift between the magnetic and electric dipole resonances in typical QW. That is why independent measurements of the magnetic and electric dipole resonant frequencies could allow both the extracting the QW parameters and the experimental verifying of theoretical models of collective fermion interaction. Taking into account relative weakness of the magnetic dipole absorption, we propose a waveguide scheme for its experimental observation.

arXiv comment14 pages, 4 figures

References in corpus (8)

• Ultra-Strong Light-Matter Coupling Regime with Polariton Dots
• Intersubband Polaritons in the Electrical Dipole Gauge
• Charge induced coherence between intersubband plasmons in a quantum structure
• Superradiant Decay of Cyclotron Resonance of Two-Dimensional Electron Gases
• Second-order nonlinear optical response of graphene
• Quantum model of coupled intersubband plasmons
• Enhancement of the spontaneous emission in subwavelength quasi-two-dimensional waveguides and resonators
• Difference frequency generation of surface plasmon-polaritons in Landau quantized graphene