Two-mode quantum dot laser for terahertz generation

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K04710
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: National Institute of Information and Communications Technology
• Principal Investigator: Akahane Kouichi 国立研究開発法人情報通信研究機構, ネットワークシステム研究所ネットワーク基盤研究室, 主任研究員 (50359072)
• Co-Investigator(Kenkyū-buntansha): 川西 哲也 早稲田大学, 理工学術院, 教授 (40359063)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 量子ドット / 2波長レーザ / テラヘルツ波

Outline of Final Research Achievements

In this study, we fabricated two-mode laser using semiconductor InAs quantum dots as the gain medium in the external cavity configuration. When the QDs were used for gain media, the mode hopping could be suppressed and stable two-mode lasing was obtained. Two-mode laser emission with a separation of 0.09, 0.1, 0.3, and 1 THz has been achieved by controlling the etalon and narrow-band filter setting and corresponding beat signal was observed in interference measurement. From these results, the fabricated two-mode laser can be used for generation of terahertz wave.

Free Research Field

光エレクトロニクス