Open AccessStudy on current spreading of photonic crystal vertical cavity surface emitting lasers
Author(s) -
Baoqiang Wang,
Xu Chen,
Yingming Liu,
Yiyang Xie,
Liu Fa,
Zhao Zhen-Bo,
Zhou Kang,
Shen Guang-di
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.8542
Subject(s) - photonic crystal , materials science , current density , laser , equivalent series resistance , current (fluid) , optoelectronics , crystal (programming language) , optics , symmetry (geometry) , photonics , physics , geometry , mathematics , quantum mechanics , voltage , computer science , thermodynamics , programming language
The distribution of injected current in the active region of external cavity oxide-confined photonic crystal vertical cavity surface emitting lasers is studied extensively. An advanced three-dimensional model of current distribution is used to analyse the effects of photonic crystal structures on current density distribution and series resistance of the device. It is found that the deeper the photonic crystal holes are, the worse the circular symmetry of the current density distribution is and the higher the series resistance is,especially when the ethching depths of holes are larger than 2 μm. Different patterns of photonic crystal structures have a great imfluence on current density distribution and circular symmetry. The results are beneficial to the research and the design of external cavity oxide-confined photonic crystal vertical cavity surface emitting lasers.