Perturbative nonlinear optics in the extreme ultraviolet region

We report the investigation of the wave-mixing process with two multiple-cycle pulses having incommensurate frequencies (at 1400 nm and 800 nm). With a collinear and non-collinear configuration of the two beams, a different extreme ultraviolet (XUV) mixing field can be created at low intensity of the 800 nm field. For a high intensity of the second laser pulse we are able to amplify the XUV radiation. We show that the dynamics of the free electrons can be revealed from the frequency mixing process. | Communications in Physics, Vol. 27, No. 2 (2017), pp. 97-106 DOI: Invited Paper PERTURBATIVE NONLINEAR OPTICS IN THE EXTREME ULTRAVIOLET REGION LAP VAN DAO † AND PETER HANNAFORD Centre for Quantum and Optical Science, Faculty of Science Engineering and Technology, Swinburne University of Technology, Melbourne, Australia 3122 † E-mail: dvlap@ Received 13 February 2017 Accepted for publication 12 May 2017 Published 30 June 2017 Abstract. We report the investigation of the wave-mixing process with two multiple-cycle pulses having incommensurate frequencies (at 1400 nm and 800 nm). With a collinear and non-collinear configuration of the two beams, a different extreme ultraviolet (XUV) mixing field can be created at low intensity of the 800 nm field. For a high intensity of the second laser pulse we are able to amplify the XUV radiation. We show that the dynamics of the free electrons can be revealed from the frequency mixing process. Keywords: laser applications, nonlinear optics, high-order harmonic generation. Classification numbers: , , . I. INTRODUCTION Information on energy levels, transition dipole moments, and electronic and nuclear motions in atoms and molecules can be obtained from linear spectroscopy or one-dimensional spectroscopy where the signals are recorded versus a single time or frequency parameter. It is well known that in the visible and infrared range the dynamics of the microscopic structure of matter interacting with a strong laser field departs from the perturbative approach [1], in which the response of the medium is expanded in many orders, expressed as linear and nonlinear terms. The low-order response of a material to a laser field, ., third or fifth order, has been used to study structures of matter and their dynamics. Four-wave mixing [2] is the most common type of nonlinear spectroscopic technique where a sequence of three pulses interacts with a material to generate a .

Không thể tạo bản xem trước, hãy bấm tải xuống
TỪ KHÓA LIÊN QUAN
TÀI LIỆU MỚI ĐĂNG
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.