TY - GEN
T1 - Bi-elliptical high harmonic spectroscopy of atomic potentials
AU - Bordo, Eliyahu
AU - Neufeld, Ofer
AU - Kfir, Ofer
AU - Fleischer, Avner
AU - Cohen, Oren
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/6
Y1 - 2019/6
N2 - Within the semi-classical three-step model for high harmonic generation (HHG), the shape of the atomic/molecular potential and its eigenstates are completely neglected, and are instead parameterized through the target's ionization potential[1]. Still, in some cases the effects of these physical quantities are non-negligible, and may contribute to the harmonic response[2]. Here we show that HHG driven by ω-2ω bi-elliptical pumps (i.e. co-linear counter-rotating elliptically polarized beams of equal ellipticity[3,4]) is highly sensitive to the shape of the atomic potential, and that this sensitivity is especially accentuated in HHG spectrograms that measure the harmonic response vs. the full range of pump ellipticities. We theoretically explore this phenomenon in the noble gases He, Ne, Ar, and Kr, and identify the responsible physical mechanisms. The effect is experimentally demonstrated by observing clear disparities in the bi-elliptical HHG spectrograms from atomic Ar and Kr gases, which have relatively similar ionization potentials (Ip), but substantially differ in their valence p-shell widths and potential structures.
AB - Within the semi-classical three-step model for high harmonic generation (HHG), the shape of the atomic/molecular potential and its eigenstates are completely neglected, and are instead parameterized through the target's ionization potential[1]. Still, in some cases the effects of these physical quantities are non-negligible, and may contribute to the harmonic response[2]. Here we show that HHG driven by ω-2ω bi-elliptical pumps (i.e. co-linear counter-rotating elliptically polarized beams of equal ellipticity[3,4]) is highly sensitive to the shape of the atomic potential, and that this sensitivity is especially accentuated in HHG spectrograms that measure the harmonic response vs. the full range of pump ellipticities. We theoretically explore this phenomenon in the noble gases He, Ne, Ar, and Kr, and identify the responsible physical mechanisms. The effect is experimentally demonstrated by observing clear disparities in the bi-elliptical HHG spectrograms from atomic Ar and Kr gases, which have relatively similar ionization potentials (Ip), but substantially differ in their valence p-shell widths and potential structures.
UR - http://www.scopus.com/inward/record.url?scp=85074647432&partnerID=8YFLogxK
U2 - 10.1109/CLEOE-EQEC.2019.8872810
DO - 10.1109/CLEOE-EQEC.2019.8872810
M3 - 会议稿件
AN - SCOPUS:85074647432
T3 - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
BT - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019
Y2 - 23 June 2019 through 27 June 2019
ER -