Transformation of spin and orbital angular momentum in second harmonic generation process at oblique incidence of light from the surface of an isotropic medium with spatial dispersion of quadratic nonlinearity

2021 ◽  
Author(s):  
Kirill Grigoriev ◽  
Vladislav Diukov ◽  
Vladimir Makarov
Keyword(s):  
Angular Momentum ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Orbital Angular Momentum ◽  
Isotropic Medium ◽  
Oblique Incidence ◽  
Spatial Dispersion ◽  
Second Harmonic ◽  
Quadratic Nonlinearity ◽  
Generation Process

scholarly journals Second-harmonic generation and the conservation of spatiotemporal orbital angular momentum of light

2020 ◽  
Author(s):  
Guan Gui ◽  
Nathan Brooks ◽  
Henry Kapteyn ◽  
Margaret Murnane ◽  
Chen-Ting Liao
Keyword(s):  
Angular Momentum ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Orbital Angular Momentum ◽  
Topological Charge ◽  
Second Harmonic ◽  
Space Time ◽  
Generation Process ◽  
Space And Time ◽  
Phase Singularities

Abstract Light with spatiotemporal orbital angular momentum (ST-OAM) is a recently discovered type of structured electromagnetic field with characteristic space-time spiral phase structure and transverse OAM. In this work, we present the first generation and characterization of the second-harmonic of ST-OAM pulses. By uncovering the conservation of transverse OAM in a second-harmonic generation process, where the space-time topological charge of the fundamental field is doubled along with the optical frequency, we establish a general nonlinear scaling rule— analogous to that describing the spatial topological charges associated with the conventional longitudinal OAM of light. Furthermore, we observe that the topology of a second-harmonic ST-OAM pulse can be modified by complex spatiotemporal astigmatism, giving rise to multiple phase singularities separated in space and time. Our finding thus confirms that a spatiotemporal phase winding, surrounding one or many phase singularities in space and time, can be interpreted as a new class of topological charge. Our study opens a new route for nonlinear conversion and scaling of light carrying ST-OAM with the potential for driving other secondary ST-OAM sources of electromagnetic fields, electron pulses, and beyond.

scholarly journals Arbitrary orbital angular momentum addition in second harmonic generation

2014 ◽  
Vol 16 (9) ◽  
pp. 093041 ◽  
Author(s):  
W T Buono ◽  
L F C Moraes ◽  
J A O Huguenin ◽  
C E R Souza ◽  
A Z Khoury
Keyword(s):  
Angular Momentum ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Orbital Angular Momentum ◽  
Second Harmonic

scholarly journals Orbital angular momentum mixing in type II second harmonic generation

2017 ◽  
Author(s):  
L J. Pereira ◽  
W. T. Buono ◽  
D. S. Tasca ◽  
K. Dechoum ◽  
A. Z. Khoury
Keyword(s):  
Angular Momentum ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Orbital Angular Momentum ◽  
Second Harmonic ◽  
Type Ii

scholarly journals Second-harmonic generation of asymmetric Bessel-Gaussian beams carrying orbital angular momentum

2020 ◽  
Vol 28 (2) ◽  
pp. 2536 ◽  
Author(s):  
Kunjian Dai ◽  
Wenzhe Li ◽  
Kaitlyn S. Morgan ◽  
Yuan Li ◽  
J. Keith Miller ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Orbital Angular Momentum ◽  
Second Harmonic ◽  
Gaussian Beams

Nonlinear Metasurface for Simultaneous Control of Spin and Orbital Angular Momentum in Second Harmonic Generation

Nano Letters ◽  
2017 ◽  
Vol 17 (12) ◽  
pp. 7974-7979 ◽  
Author(s):  
Guixin Li ◽  
Lin Wu ◽  
King F. Li ◽  
Shumei Chen ◽  
Christian Schlickriede ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Orbital Angular Momentum ◽  
Second Harmonic ◽  
Simultaneous Control

Conversion of the optical orbital angular momentum in a plasmon-assisted second-harmonic generation

2016 ◽  
Vol 109 (8) ◽  
pp. 081105 ◽  
Author(s):  
Yongmei Wang ◽  
Dunzhao Wei ◽  
Yunzhi Zhu ◽  
Xiaoyang Huang ◽  
Xinyuan Fang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Orbital Angular Momentum ◽  
Second Harmonic
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