Author Affiliations
1State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China2Shanghai Research Center for Quantum Sciences, Shanghai 201315, China3Jinan Institute of Quantum Technology, Jinan, Shandong 250101, China4Shandong Provincial Engineering and Technical Center of Light Manipulations, Shandong Normal University, Jinan, Shandong 250358, China5Department of Physics, Jiangxi Normal University, Nanchang, Jiangxi 330022, China6Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, Shanghai 201899, Chinashow less
Fig. 1. Simulated second harmonic (SH) distribution at different nonlinear interfaces
[45]. (a) Structure diagram of nonlinear medium; (b) bulk LN medium; (c) domain wall; (d) LN crystal surface
Fig. 2. SH distribution at different nonlinear interfaces
[45]. (a)
C1=
C2; (b)
C1=1,
C2=0; (c)
C1=1,
C2=10
Fig. 3. Experimental setup and angle measurement of SH radiation
[45]. (a) Experiment setup; (b) relationship between nonlinear Cherenkov radiation angle generated at the boundary of BBO crystal and the interface of BBO-LN crystal and incident angle of fundamental frequency light
Fig. 4. Intensity comparison of the second harmonic generated at two nonlinear interfaces
[45]. (a) BBO-LN interface; (b) single BBO crystal surface
Fig. 5. Spectra of fundamental frequency light and second harmonic wave generated at the boundary of BBO or LN crystal
[62] Fig. 6. Intensity of second harmonic wave generated at the interface of BBO-LN and the boundary of BBO
[62] Fig. 7. Three approaches to generate vortex beams
[104]. (a) Spiral phase plate; (b) hologram with spiral phase; (c) fork-shaped grating
Fig. 8. Generation and propagation of the Airy beam
[72]. (a) Phase diagram of Airy beam generated in one dimension; (b) Airy beam generated by the far field and variation of light beam with propagation distance
Fig. 9. Vector beams
[80]. (a) Experimental setup for generating vector beam; (b) vector beams with
m=1 and
φ0=0,
π/4,
π/2, 3
π/4,
respectively; (
c)
vector beams with m=2,3,5 and
φ0=0
Fig. 10. Schematic of nonlinear harmonic wave manipulation in structured light field
[112] Fig. 11. Generated second harmonic wave of fundamental frequency (FW) light with different phase structures
[117]. (a)(d) Phase structure of the FW; (b)(e) phase-matching geometries of the nonlinear Raman-Nath second harmonic generation under non-diffraction assumption of the FW; (c)(f) SH diffraction patterns in the far field; (g) FW light shape at exit surface of the crystal
Fig. 12. Nonlinear vortex beam array generation
[119]. (a) 1D; (b) 2D
Fig. 13. Dynamic nonlinear holographic generation
[121]. (a) Schematic of the experimental setup for realizing dynamic holography; (b) phase-matching diagram of the non-collinear second harmonic; (c) experimentally realized running horse
Fig. 14. Schematic of the experimental setup for realizing frequency conversion of vector light field by using cascaded nonlinear crystals
[122] Fig. 15. Second harmonic focusing through a scattering medium via feedback-based wavefront shaping method
[66] Fig. 16. Speckle patterns and spot focusing patterns
[129]. (a)(c) Speckle pattern of fundamental frequency light and second harmonic light before optimization; (b)(d) spot focusing pattern of fundamental frequency light and second harmonic light after optimization
Fig. 17. Polarization method of PPLNOI. (a) Schematic of the
x-cut LNOI poling method; (b)
x-cut periodic polarization LNOI
[135]; (c) schematic of the
z-cut LNOI poling method; (d)
z-cut periodic polarization LNOI
[137] Fig. 18. Cascaded nonlinear process in LN microdisks
[142-143]. (a) Microscopy image; (b) scanning electron microscope (SEM) image; (c) simulated fundamental mode; (d) cascaded third harmonic generation; (e) cascaded four-wave mixing frequency effect
Fig. 19. Theoretical simulation of cyclic phase matching of TE mode in microcavities
[149]. (a) Schematic of phase matching; (b) relationship between effective refractive index and angle; (c) relationship between wave vector mismatch and angle; (d) relationship between effective nonlinear coefficient and angle; (e) relationship between second harmonic wave intensity and angle
Fig. 20. Structural design, mode electric field distribution, and nonlinear coefficient of the corresponding region of the ordinary and semi-nonlinear integrated optical waveguides
[150] Fig. 21. Electro-optical polarization controller in PPLNOI ridge waveguide and its applications
[151-153]. (a) Cascading processing of electro-optical polarization coupling and second harmonic; (b) schematic of single-photon generation and polarization control; (c) coincidence count as a function of the applied voltage
Fig. 22. Broadband electro-optical frequency comb in LN microring cavity
[157]. (a) SEM image of LN microring cavity; (b) spectrum of broadband electro-optic optical frequency comb
Fig. 23. Experimental setup of frequency conversion and spectral compression of broadband single-photon-level weak coherent light
[173] Fig. 24. Spectra and relative frequency of the positively chirped laser pulse and up-converted laser pulse
[173]. (a) Spectra; (b) relative frequency
Fig. 25. Experimental setup of nonlinear interaction between two broadband single-photon-level weak coherent light
[175] Fig. 26. SFG efficiency and number of SFG photons
[175] Fig. 27. Experimental setup of the single-photon frequency convertor
[177] Fig. 28. Experimental setup of SPDC photon-pair preparation
[177] Fig. 29. Two-photon interference patterns
[177]. (a) Before frequency conversion; (b) after frequency conversion
Fig. 30. Entanglement between two independent photons
[185]. (a) Entanglement-swapping-based DWDM quantum network; (b) SFG between two non-entangled photons
Fig. 31. SFG efficiency of non-entangled photons and fidelity of generated entangled states
[185]. (a) SFG efficiency of non-entangled photons; (b) fidelity of the corresponding entangled states