Three-Dimensional Optical Crystals and Localized Structures in Cavity Second Harmonic Generation

A numerical study of the effect of betatron oscillations on the second harmonic generation in free-electron lasers (FELs) is presented. Analytical expressions for the effective coupling strength factors are derived that clearly distinguish all contributions in subharmonics and each polarization of the radiation. A three-dimensional time-dependent numerical FEL code that takes into account the main FEL effects and the individual contribution of each electron to the second harmonic generation is presented. Also, the X- and Y-polarizations of the second harmonic are analyzed. The second harmonic was detected in experiments at the Advanced Photon Source (APS) Low Energy Undulator Test Line (LEUTL) and Linac Coherent Light Source (LCLS) in the soft X-ray regime. The approach presented in the article can be useful for a comprehensive study and diagnostics of XFELs. In the paper, the LCLS and Pohang Accelerator Laboratory X-ray Free-Electron Laser (PAL-XFEL) experiments are modeled. The simulation results are in a good agreement with the experimental data.

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Size effect and identified superior functional units enhancing second harmonic generation responses on the II-IV-V2 type nonlinear optical crystals

Chemical Physics ◽

10.1016/j.chemphys.2018.11.010 ◽

2019 ◽

Vol 518 ◽

pp. 101-106 ◽

Cited By ~ 2

Author(s):

Guijie He ◽

Ilmira Rozahun ◽

Zhi Li ◽

Jun Zhang ◽

Ming-Hsien Lee

Keyword(s):

Second Harmonic Generation ◽

Size Effect ◽

Harmonic Generation ◽

Nonlinear Optical ◽

Second Harmonic ◽

Nonlinear Optical Crystals ◽

Optical Crystals ◽

Functional Units

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Three-dimensional nonstationary calculation of Quasi-phase-matched guided-wave, second-harmonic generation using weighted-index method

Electronics and Communications in Japan (Part II Electronics) ◽

10.1002/ecjb.4420750505 ◽

1992 ◽

Vol 75 (5) ◽

pp. 44-53

Author(s):

Kazunori Yanagawa ◽

Kazuya Hayata ◽

Masanori Koshiba

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Three Dimensional ◽

Guided Wave ◽

Index Method ◽

Weighted Index

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Computational design of inorganic nonlinear optical crystals based on a genetic algorithm

CrystEngComm ◽

10.1039/c4ce01606h ◽

2014 ◽

Vol 16 (46) ◽

pp. 10569-10580 ◽

Cited By ~ 28

Author(s):

Zhenxing Fang ◽

Jing Lin ◽

Rong Liu ◽

Ping Liu ◽

Yi Li ◽

...

Keyword(s):

Genetic Algorithm ◽

Second Harmonic Generation ◽

Harmonic Generation ◽

Nonlinear Optical ◽

Second Harmonic ◽

Computational Design ◽

Theoretical Method ◽

Nonlinear Optical Crystals ◽

Optical Crystals

A theoretical method to design inorganic nonlinear optical crystals for second harmonic generation (SHG) is presented here.

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New implementation of second harmonic generation microscopy for three-dimensional resolution

10.1117/12.478032 ◽

2003 ◽

Author(s):

Changhuei Yang ◽

Jerome Mertz

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Three Dimensional ◽

Second Harmonic Generation Microscopy

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Na4Yb(CO3)3F: A New UV Nonlinear Optical Material with a Large Second Harmonic Generation Response

Crystals ◽

10.3390/cryst8100381 ◽

2018 ◽

Vol 8 (10) ◽

pp. 381

Author(s):

Qiaoling Chen ◽

Min Luo ◽

Chensheng Lin

Keyword(s):

Second Harmonic Generation ◽

Harmonic Generation ◽

Nonlinear Optical ◽

Diffuse Reflectance ◽

Second Harmonic ◽

Three Dimensional ◽

One Dimensional ◽

Nonlinear Optical Crystals ◽

3D Network ◽

3D Framework

A new nonlinear optical crystals fluoride carbonate, Na4Yb(CO3)3F, has been synthesized by mild hydrothermal method. The Na4Yb(CO3)3F crystallizes in the noncentrosymmetric space group Cc (no. 9) with the lattice parameters a = 8.018(3), b = 15.929(5), c = 13.950(5) Å and β = 101.425(6)°. The compound Na4Yb(CO3)3F has a high density of [CO3] groups. The structure can be described as one-dimensional [Na5Yb(CO3)2F2] chains connected by [CO3] groups, forming an intricate three-dimensional (3D) framework. Other Na+ and Yb3+ cations are located in the cavities of 3D network. The powder second harmonic generation (SHG) measurement shows that Na4Yb(CO3)3F features a large SHG response, about 4.3 times that of KH2PO4 (KDP), and is a phase-matchable material. In addition, its UV-Vis-NIR diffuse reflectance spectral data indicate that Na4Yb(CO3)3F has a large optical gap about 4.72 eV, which corresponds to the UV cut-off edge of 263 nm.

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