Laser & Optoelectronics Progress, Volume. 54, Issue 3, 31901(2017)
Theoretical Study on Two-Photon Absorption Associated with Intraband Transitions in Graphene Quantum Disks
The structure of electronic energy levels is obtained by solving electronic Dirac equation of graphene quantum disks (GQDs) under the infinite-mass boundary conditions. On this basis, the properties of two-photon absorption (TPA) of GQDs are studied theoretically, and the analytical expression of TPA coefficient associated with electron transitions in the conduction band under an arbitrary size-distribution as well as the two-photon transition selection rule are obtained. The research results show that the peak value of TPA coefficient is about 8 orders of magnitude greater than that of conventional semiconductor quantum dots. The energy spectra and TPA spectra can be adjusted and controlled by the GQDs size, size-distribution function and electron relaxation energy.
Get Citation
Copy Citation Text
Li Zhisong, Feng Xiaobo. Theoretical Study on Two-Photon Absorption Associated with Intraband Transitions in Graphene Quantum Disks[J]. Laser & Optoelectronics Progress, 2017, 54(3): 31901
Category: Nonlinear Optics
Received: Nov. 7, 2016
Accepted: --
Published Online: Mar. 8, 2017
The Author Email: Zhisong Li (1515085456@qq.com)