Quantum light sources based on spontaneous two photon emission from quantum dot-nanocavity coupled ysystems

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760037
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Applied optics/Quantum optical engineering
• Research Institution: The University of Tokyo
• Principal Investigator: OTA Yasutomo 東京大学, ナノ量子情報エレクトロニクス研究機構, 特任准教授 (90624528)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 量子ドット / フォトニック結晶 / 二光子過程 / 非線形光学 / ナノレーザー

Outline of Final Research Achievements

Quantum dot photonic crystal nanocavity coupled systems have been studied in terms of the two photon interaction. The concept of self-frequency conversion, in which both lasing oscillation and nonlinear optical frequency conversion occur using a single laser crystal, has been applied to nanocavities, leading to the demonstration of self-frequency conversion nanolasers. Combining with a broad quantum dot gain, micro integration of the self-frequency conversion lasers enables the realization of a visible nanolaser array, covering an almost entire visible range. In addition, the efficiency of the frequency conversion has been studied in terms of the statistics of the intracavity photons. Furthermore, a method to extract the direct free space spontaneous emission from strongly coupled quantum dot nanocavity systems has been developed. These results will provide significant insights for the development of quantum optical light sources based on the intra-cavity two photon physics.

Free Research Field

量子オプトエレクトロニクス