A theoretical framework and dynamical model for description of the natural optical activity and Faraday rotation in an individual chiral single-walled carbon nanotube in the highly nonlinear coherent regime is proposed. The model is based on a discrete-level representation of the optically active states near the band edge. Chirality is modelled by a system Hamiltonian corresponding to energy-level configurations, specific for each handedness, that are mirror reflections of each other. An axial magnetic field is introduced through the Aharonov-Bohm and Zeeman energy-level shifts.The time evolution of the quantum system is studied using the coherent vector Maxwell-pseudospin equations. Giant natural and magneto-optical gyrotropy, exceeding the one of the artificial photonic metamaterials, is numerically demonstrated for a single (5,4) carbon nanotube and an estimate of the magnitude of the natural circular dichroism and specific optical rotatory power is obtained. The model provides a framework for investigation of chirality and magnetic field dependence of the ultrafast nonlinear optical response of a single carbon nanotube.
|Number of pages||5|
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2010|
|Event||II Workshop on Theory, Modelling and Computational Methods for Semiconductor Materials and Nanostructures - York, UK United Kingdom|
Duration: 13 Jan 2010 → 15 Jan 2010