Unified understanding of laser breakdown in the vicinity of threshold by the percolation model

2015 Fiscal Year Final Research Report

• Project/Area Number: 25610173
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Plasma science
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: KATO SUSUMU 国立研究開発法人産業技術総合研究所, 電子光技術研究部門, 主任研究員 (20356786)
• Co-Investigator(Kenkyū-buntansha): SASAKI Akira 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門量子ビーム応用研究センター, 研究副主幹 (10215709)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: レーザーブレイクダウン / 準安定状態 / 光学結晶

Outline of Final Research Achievements

We investigated the elementary process in laser breakdown of LiNbO3-type crystals under continuous-wave laser irradiation to obtain a unified understanding of laser breakdown.

It is well known that long-lived polarons, which have large absorption cross sections for visible and infrared light, exist in these crystals. We proposed a model of light-induced absorption of the polarons on the cause of the laser breakdown. The model is a candidate to explain the breakdown thresholds observed in experiments.

Free Research Field

プラズマ物理