2020 Fiscal Year Annual Research Report

Searching new operation area for QCL by Gain Mapping using NEGF

Research Project

Project/Area Number	18K04251
Research Institution	Institute of Physical and Chemical Research
Principal Investigator	Yun Joosun 国立研究開発法人理化学研究所, 開拓研究本部, 基礎科学特別研究員 (30817359)
Co-Investigator(Kenkyū-buntansha)	平山秀樹国立研究開発法人理化学研究所, 開拓研究本部, 主任研究員 (70270593)
Project Period (FY)	2018-04-01 – 2021-03-31
Keywords	QCL / NEGF
Outline of Annual Research Achievements	We had analytically estimated how large averaged-random electric field could be generated due to the interface roughness of GaN/AlGaN before. However, since the randomness of interface roughness will trigger the enormous randomly distributed electric field around quantum wells, modeling self-energy based on the averaged-random electric field will unfit to discover the origin of the difficulty of spontaneous emission. Therefore, we start to develop 3D NEGF (non-equilibrium Green function) carrier transport simulator and polarization-induced interface roughness scattering’s self-energy to prove the impact of random electric field without objection. Since the time required for the development of the above contents is predicted as quite long, we have parallelly investigated a new waveguide structure that may pull in the realization of the efficient GaN/AlGaN QCL in the near future. We are preparing a patent and a research paper to publish.

(1 results)