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Routes to control Cooper minimum in high order harmonics generated in argon gas

التفاصيل البيبلوغرافية
العنوان: Routes to control Cooper minimum in high order harmonics generated in argon gas
المؤلفون: G S Boltaev, R A Ganeev, N A Abbasi, M Iqbal, V V Kim, H Al-Harmi, X M Tong, A S Alnaser
المصدر: New Journal of Physics, Vol 22, Iss 8, p 083031 (2020)
بيانات النشر: IOP Publishing
سنة النشر: 2020
المجموعة: Directory of Open Access Journals: DOAJ Articles
مصطلحات موضوعية: Cooper minimum, high harmonics generation, strong field ionization, Science, Physics, QC1-999
الوصف: We present a systematic study on the control of Cooper minimum (CM) in the high-order harmonics spectra generated during the interaction of Ar gas with ultrashort near-infrared laser pulses. Tailoring the width and depth of CM in argon is demonstrated by changing the gas jet position with respect to the focal plane of focusing lens and by defocusing-assisted phase-matching. We further analyze the influence of single- and two-color laser pump schemes on the appearance of CM. The application of two orthogonally-polarized fields of fundamental radiation and its second harmonic, which is also used to generate controllable yields of odd and even harmonics, led to diminishing the CM in the harmonic spectra. Our experimental findings are supported by theoretical calculations that solve the time-dependent Schrödinger equation in the microscopic domain, and take into account the phase matching in the macroscopic domain.
نوع الوثيقة: article in journal/newspaper
اللغة: English
تدمد: 1367-2630
Relation: https://doi.org/10.1088/1367-2630/aba1b1; https://doaj.org/toc/1367-2630; https://doaj.org/article/323e5b79294a4277a0ff79382b96cb46
DOI: 10.1088/1367-2630/aba1b1
الاتاحة: https://doi.org/10.1088/1367-2630/aba1b1
https://doaj.org/article/323e5b79294a4277a0ff79382b96cb46
رقم الانضمام: edsbas.EAD62EDA
قاعدة البيانات: BASE
الوصف
تدمد:13672630
DOI:10.1088/1367-2630/aba1b1