Generation of low-order Laguerre-Gaussian beams using hybrid-machined reflective spiral phase plates for intense laser-plasma interactions

被引：26

作者：

Bae, Ji Yong ^{[1
]}

Jeon, Cheonha ^{[2
]}

Pae, Ki Hong ^{[2
,3
]}

Kim, Chul Min ^{[2
,3
]}

Kim, Hong Seung ^{[1
]}

Han, Ilkyu ^{[1
]}

Yeo, Woo-Jong ^{[1
]}

Jeong, Byeongjoon ^{[1
]}

Jeon, Minwoo ^{[1
]}

Lee, Dong-Ho ^{[1
]}

Kim, Dong Uk ^{[1
]}

Hyun, Sangwon ^{[1
]}

Hur, Hwan ^{[1
]}

Lee, Kye-Sung ^{[1
]}

Kim, Geon Hee ^{[1
]}

Chang, Ki Soo ^{[1
]}

Choi, Il Woo ^{[2
,3
]}

Nam, Chang Hee ^{[2
,4
]}

Kim, I. Jong ^{[1
]}

机构：

[1] Korea Basic Sci Inst, Div Sci Instrumentat & Management, 169-148 Gwahak Ro, Daejeon 34133, South Korea

[2] Inst Basic Sci, Ctr Relativist Laser Sci, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

[3] Gwangju Inst Sci & Technol, Adv Photon Res Inst, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

[4] Gwangju Inst Sci & Technol, Dept Phys & Photon Sci, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

来源：

RESULTS IN PHYSICS | 2020年 / 19卷

关键词：

Laguerre-Gaussian vortex beam; Off-axis reflective spiral phase plate; Hybrid mechanical processing; Laser-plasma interaction; Orbital angular momentum; Spin angular momentum; ANGULAR-MOMENTUM;

D O I：

10.1016/j.rinp.2020.103499

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In laser-plasma interactions (LPI), the laser beam mode is a critical parameter when trying to explore new physical phenomena. Of the various spatial beam modes, the Laguerre-Gaussian (LG) mode with vortex phase has attracted considerable attention due to its unique features, including the ability to carry an orbital angular momentum. Due to this, it has been actively applied to LPI, which mainly utilize ultrashort intense laser pulses. However, existing transmissive phase-manipulating optical elements have several limitations when applied in LPI due to critical issues such as pulse broadening, attenuation, and beam shape-all of which have an influence on the beam quality, as well as, geometry, size, simplicity, and cost-all of which are related to processing technologies. In this paper, we present a series of procedures to obtain high-quality low-order (l = 1 and 2) LG vortex beams from large-sized off-axis reflective spiral phase plates (ORSPPs). The geometric designs for various surface structures, electromagnetic wave simulations in the extra-large domain, hybrid-mechanical processing technique attempted newly, and experimental demonstrations are involved. Experimental observations of LG intensity distributions and interference fringes were verified with the simulation results of Poynting vector, phase, and angular momentum densities. The beam quality of LG intensity distributions was analyzed quantitatively through the investigation of an annular zone formed from the uniformity of the stepped and continuous surface structures of ORSPPs. Furthermore, we numerically investigated the physical phenomena on the high-intensity angular momentum transfer from light to matter, considering ORSPP-driven low-order LG vortex laser pulses, by performing 3D particle-in-cell simulations.

引用

页数：11

共 44 条

[1] From transverse angular momentum to photonic wheels [J].