Abstract- Optical bistability of graphene in the terahertz range

N. M. R. Peres, Yu. V. Bludov, Jaime E. Santos, Antti-Pekka Jauho, and M. I. Vasilevskiy

https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.125425

We use an exact solution of the relaxation-time Boltzmann equation in a uniform ac electric field to describe the nonlinear optical response of graphene in the terahertz (THz) range. The cases of monolayer, bilayer, and ABA-stacked trilayer graphene are considered, and the monolayer species is shown to be the most appropriate one to exploit the nonlinear free electron response. We find that a single layer of graphene shows optical bistability in the THz range, within the electromagnetic power range attainable in practice. The current associated with the third harmonic generation is also computed.

DOI: http://dx.doi.org/10.1103/PhysRevB.90.125425

• 
• 
• 

• Published 16 September 2014
• Received 23 June 2014
• Revised 8 August 2014

©2014 American Physical Society

Abstract-Enhancing the absorption of graphene in the terahertz range

N. M. R. Peres and Yu. V. Bludov
http://iopscience.iop.org/0295-5075/101/5/58002;jsessionid=B8150D0144F622146DF83E5196D21AB6.c2
We study graphene on a photonic crystal operating in the terahertz (THz) spectral range. We show that the absorption of graphene becomes a modulated function of frequency and can be enhanced by more than three times at specific frequency values, depending on the parameters of the system. The problem of a semi-infinite photonic crystal is also solved