J4 ›› 2014, Vol. 31 ›› Issue (3): 340-347.

• Laser Applications • Previous Articles     Next Articles

Simulation of Nanodevices Eigenvalue Problems Based on Higher-order Symplectic Algorithm

SHEN Jing,KUANG Xiao Jing,ZHANG Liang,Cao Xin Yuan, Chen Ming Sheng, Zhang Zhong Xiang   

  1. School of Electronic Engineering,Heifei Normal University,, Hefei 230061, China
  • Published:2014-05-28 Online:2014-05-27

Abstract: Numerical solutions of Schr?dinger equation have become increasingly important because of the tremendous demands for the design and optimization of nanodevices where quantum effects are significant or dominate. Using the three-order symplectic integrators and fourth-order collocated spatial differences, a high-order symplectic finite-difference time-domain (SFDTD) scheme is proposed to solve the time-dependent Schr?dinger equation. A detailed numerical study on 1D quantum eigenvalue problems is carried out. Compared with FDTD(2,2) and FDTD(2,4), the simulation results of quantum wells and harmonic oscillators strongly confirm that the explicit SFDTD scheme is well suited for a long-term simulation.

Key words: quantum optics, symplectic integrators, finite-difference time-domain, Schr?dinger equation, nanodevices eigenvalue problems

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