Circularly polarized lasing in semiconductor three-dimensional chiral photonic crystals

2015 Fiscal Year Final Research Report

• Project/Area Number: 26889018
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Electron device/Electronic equipment
• Research Institution: The University of Tokyo
• Principal Investigator: Takahashi Shun 東京大学, ナノ量子情報エレクトロニクス研究機構, 特任助教 (60731768)
• Project Period (FY): 2014-08-29 – 2016-03-31
• Keywords: 電子デバイス・機器 / フォトニック結晶

Outline of Final Research Achievements

Circularly polarized light source based on a complex system of semiconductor three-dimensional chiral photonic crystals and quantum dots was realized by use of circularly polarized photonic band structures. This achievement results from manipulating the density of states in the vacuum field for one of the circular polarizations. The emission intensity difference as well as the radiative lifetime difference between the two circular polarizations confirmed the operating principle of the obtained circularly polarized light source. In addition, a chiral cavity mode for circularly polarized light was also demonstrated. These achievements through this research project can be applied to information technology, chemistry, or biology as robust circularly polarized light sources formed by geometrical structures with chirality.

Free Research Field

三次元フォトニック結晶を用いた光制御