Ultra high intensity terahertz pulse generation for attosecond photoelectron spectroscopy

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K13375
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Optical engineering, Photon science
• Research Institution: The University of Tokyo
• Principal Investigator: ITATANI Jiro 東京大学, 物性研究所, 准教授 (50321724)
• Co-Investigator(Renkei-kenkyūsha): ISHII Nobuhisa 東京大学, 物性研究所, 助教 (40586898) ; KANAI Teruto 東京大学, 物性研究所, 技術専門職員 (10575161) ; KITANO Kenta 青山学院大学, 理工学部, 助教 (90586900)
• Research Collaborator: KANESHIMA Keisuke 東京大学, 理学系研究科 ; TAKEUCHI Kengo 東京大学, 理学系研究科
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 応用光学・量子光光学 / 量子エレクトロニクス / 高性能レーザー / 光物性 / テラヘルツ／赤外材料・素子、天然ガス

Outline of Final Research Achievements

We have developed a novel optical parametric amplification (OPA) scheme, the dual-wavelength OPA, to produce intense mid-IR pulses. The scheme is based on the OPA to amplify heavily chirped pulse with the third-order dispersion, resulting in the phased two-color pulses. These pulses are focused into an LGS crystal to produce carrier-envelope phase-stable mid-IR pulses that cover 5-10 micrometers in the spectrum. The waveform of the electric field was directly measured by the electro-optic sampling method using 6.5-fs ultrashort visible pulses. The focused intensity of the mid-IR pulses reaches 56 MV/cm. These results are an important step to expand the objects of attosecond optical science from gas-phase atoms and molecules, to crystalline solids and condensed matters.

Free Research Field

アト秒光科学，レーザー物理