標題: | Finite-difference time-domain analysis for the dynamics and diffraction of exciton-polaritons |
作者: | Chen, Minfeng Chang, Yia-Chung Hsieh, Wen-Feng 光電工程學系 Department of Photonics |
公開日期: | 1-十月-2015 |
摘要: | We adopted a finite-difference time-domain (FDTD) scheme to simulate the dynamics and diffraction of exciton-polaritons, governed by the coupling of polarization waves with electromagnetic waves. The polarization wave, an approximate solution to the Schrodinger\'s equation at low frequencies, essentially captures the exciton behavior. Numerical stability of the scheme is analyzed and simple examples are provided to prove its validity. The system considered is both temporally and spatially dispersive, for which the FDTD analysis has attracted less attention in the literature. Here, we demonstrate that the FDTD scheme could be useful for studying the optical response of the exciton-polariton and its dynamics. The diffraction of a polariton wave from a polaritonic grating is also considered, and many sharp resonances are found, which manifest the interference effect of polariton waves. This illustrates that the measurement of transmittance or reflectance near polariton resonance can reveal subwave-length features in semiconductors, which are sensitive to polariton scattering. (C) 2015 Optical Society of America |
URI: | http://dx.doi.org/10.1364/JOSAA.32.001870 http://hdl.handle.net/11536/129592 |
ISSN: | 1084-7529 |
DOI: | 10.1364/JOSAA.32.001870 |
期刊: | JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION |
Volume: | 32 |
Issue: | 10 |
起始頁: | 1870 |
結束頁: | 1875 |
顯示於類別: | 期刊論文 |