G. T. Xue, X. H. Tian, C. Zhang, Z. D. Xie, P. Xu, Y. X. Gong, and S. N. Zhu, “Effect of thickness variations of lithium niobate on insulator waveguide on the frequency spectrum of spontaneous parametric down-conversion,” Chin. Phys. B 30(11), 110313 (2021).
[Crossref]

S. Reitzig, M. Rüsing, J. Zhao, B. Kirbus, S. Mookherjea, and L. M. Eng, “‘Seeing is believing’—In-depth analysis by co-imaging of periodically-poled x-cut lithium niobate thin films,” Crystals 11(3), 288 (2021).
[Crossref]

D. Zhu, L. B. Shao, M. J. Yu, R. Cheng, B. Desiatov, C. J. Xin, Y. W. Hu, J. Holzgrafe, S. Ghosh, A. Shams-Ansari, E. Puma, N. Sinclair, C. Reimer, M. Zhang, and M. Lončar, “Integrated photonics on thin-film lithium niobate,” Adv. Opt. Photonics 13(2), 242–352 (2021).
[Crossref]

Y. F. Niu, C. Lin, X. Y. Liu, Y. Chen, X. P. Hu, Y. Zhang, X. L. Cai, Y. X. Gong, Z. D. Xie, and S. N. Zhu, “Optimizing the efficiency of a periodically poled LNOI waveguide using in situ monitoring of the ferroelectric domains,” Appl. Phys. Lett. 116(10), 101104 (2020).
[Crossref]

J. Zhao, C. X. Ma, M. Rüsing, and S. Mookherjea, “High quality entangled photon pair generation in periodically poled thin-film lithium niobate waveguides,” Phys. Rev. Lett. 124(16), 163603 (2020).
[Crossref]

Z. H. Ma, J. Y. Chen, Z. Li, C. Tang, Y. M. Sua, H. Fan, and Y. P. Huang, “Ultrabright quantum photon sources on chip,” Phys. Rev. Lett. 125(26), 263602 (2020).
[Crossref]

J. Zhao, M. Rüsing, M. Roeper, L. M. Eng, and S. Mookherjea, “Poling thin-film x-cut lithium niobate for quasi-phase matching with sub-micrometer periodicity,” J. Appl. Phys. 127(19), 193104 (2020).
[Crossref]

J. T. Nagy and R. M. Reano, “Submicrometer periodic poling of lithium niobate thin films with bipolar preconditioning pulses,” Opt. Mater. Express 10(8), 1911–1920 (2020).
[Crossref]

B. N. Slautin, A. P. Turygin, E. D. Greshnyakov, A. R. Akhmatkhanov, H. Zhu, and V. Y. Shur, “Domain structure formation by local switching in the ion sliced lithium niobate thin films,” Appl. Phys. Lett. 116(15), 152904 (2020).
[Crossref]

M. Santandrea, M. Stefszky, V. Ansari, and C. Silberhorn, “Fabrication limits of waveguides in nonlinear crystals and their impact on quantum optics applications,” New J. Phys. 21(3), 033038 (2019).
[Crossref]

J. Y. Chen, Z. H. Ma, Y. M. Sua, Z. Li, C. Tang, and Y. P. Huang, “Ultra-efficient frequency conversion in quasi-phase- matched lithium niobate microrings,” Optica 6(9), 1244–1245 (2019).
[Crossref]

J. J. Lu, J. B. Surya, X. W. Liu, A. W. Bruch, Z. Gong, Y. T. Xu, and H. X. Tang, “Periodically poled thin film lithium niobate microring resonators with a second-harmonic generation efficiency of 250,000%/W,” Optica 6(12), 1455–1460 (2019).
[Crossref]

A. Boes, B. Corcoran, L. Chang, J. Bowers, and A. Mitchell, “Status and potential of lithium niobate on insulator (LNOI) for photonic integrated circuits,” Laser Photonics Rev. 12(4), 1700256 (2018).
[Crossref]

R. Luo, Y. He, H. X. Liang, M. G. Li, and Q. Lin, “Highly tunable efficient second-harmonic generation in a lithium niobate nanophotonic waveguide,” Optica 5(8), 1006–1011 (2018).
[Crossref]

C. Wang, C. Langrock, A. Marandi, M. Jankowski, M. Zhang, B. Desiatov, M. M. Fejer, and M. Lončar, “Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides,” Optica 5(11), 1438–1441 (2018).
[Crossref]

A. Rao, M. Malinowski, A. Honardoost, J. R. Talukder, P. Rabiei, P. Delfyett, and S. Fathpour, “Second-harmonic generation in periodically-poled thin film lithium niobate wafer-bonded on silicon,” Opt. Express 24(26), 29941–29947 (2016).
[Crossref]

L. Chang, Y. F. Li, N. Volet, L. R. Wang, J. Peters, and J. E. Bowers, “Thin film wavelength converters for photonic integrated circuits,” Optica 3(5), 531–535 (2016).
[Crossref]

G. H. Shao, J. Song, Y. P. Ruan, G. X. Cui, and Y. Q. Lu, “Tunable dual-wavelength filter and its group delay dispersion in domain-engineered lithium niobite,” AIP Adv. 6(12), 125034 (2016).
[Crossref]

P. Mackwitz, M. Rüsing, G. Berth, A. Widhalm, K. Müller, and A. Zrenner, “Periodic domain inversion in x-cut single-crystal lithium niobate thin film,” Appl. Phys. Lett. 108(15), 152902 (2016).
[Crossref]

A. Rao, A. Patil, J. Chiles, M. Malinowski, S. Novak, K. Richardson, P. Rabiei, and S. Fathpour, “Heterogeneous microring and Mach-Zehnder modulators based on lithium niobate and chalcogenide glasses on silicon,” Opt. Express 23(17), 22746–22752 (2015).
[Crossref]

M. D. Fontana and P. Bourson, “Microstructure and defects probed by Raman spectroscopy in lithium niobate crystals and devices,” Appl. Phys. Rev. 2(4), 040602 (2015).
[Crossref]

J. Chen, Q. Z. Zhang, T. Han, L. Zhou, G. B. Tang, B. Q. Liu, and X. J. Ji, “Theoretical analysis of surface acoustic wave propagating properties of Y-cut nano lithium niobate film on silicon dioxide,” AIP Adv. 5(8), 087173 (2015).
[Crossref]

C. Wang, M. J. Burek, Z. Lin, H. A. Atikian, V. Venkataraman, I. C. Huang, P. Stark, and M. Lončar, “Integrated high quality factor lithium niobate microdisk resonators,” Opt. Express 22(25), 30924–30933 (2014).
[Crossref]

G. Poberaj, H. Hu, W. Sohler, and P. Günter, “Lithium niobate on insulator (LNOI) for micro-photonic devices,” Laser Photonics Rev. 6(4), 488–503 (2012).
[Crossref]

L. Arizmendi, “Photonic applications of lithium niobate crystals,” Phys. Status Solidi A 201(2), 253–283 (2004).
[Crossref]

T. A. Ramadan, M. Levy, and R. M. Osgood, “Electro-optic modulation in crystal-ion-sliced z-cut LiNbO3 thin films,” Appl. Phys. Lett. 76(11), 1407–1409 (2000).
[Crossref]

V. Caciuc, A. V. Postnikov, and G. Borstel, “Ab initio structure and zone-center phonons in LiNbO3,” Phys. Rev. B 61(13), 8806–8813 (2000).
[Crossref]

M. M. Fejer, G. A. Magel, D. H. Jundt, and R. L. Fellow, “Quasi-phase-matched second harmonic generation: tuning and tolerances,” IEEE J. Quantum Electron. 28(11), 2631–2654 (1992).
[Crossref]

R. S. Weis and T. K. Gaylord, “Lithium niobate: summary of physical properties and crystal structure,” Appl. Phys. A 37(4), 191–203 (1985).
[Crossref]

B. N. Slautin, A. P. Turygin, E. D. Greshnyakov, A. R. Akhmatkhanov, H. Zhu, and V. Y. Shur, “Domain structure formation by local switching in the ion sliced lithium niobate thin films,” Appl. Phys. Lett. 116(15), 152904 (2020).
[Crossref]

M. Santandrea, M. Stefszky, V. Ansari, and C. Silberhorn, “Fabrication limits of waveguides in nonlinear crystals and their impact on quantum optics applications,” New J. Phys. 21(3), 033038 (2019).
[Crossref]

L. Arizmendi, “Photonic applications of lithium niobate crystals,” Phys. Status Solidi A 201(2), 253–283 (2004).
[Crossref]

S. Helmfrid, G. Arvidsson, and J. Webjörn, “Influence of various imperfections on the conversion efficiency of second-harmonic generation in quasi-phase-matching lithium niobate waveguides,” J. Opt. Soc. Am. B 10(2), 222–229 (1993).
[Crossref]

S. Helmfrid and G. Arvidsson, “Influence of randomly varying domain lengths and nonuniform effective index on second harmonic generation in quasi phase-matching waveguides,” J. Opt. Soc. Am. B 8(4), 797–804 (1991).
[Crossref]

F. Laurell and G. Arvidsson, “Frequency doubling in Ti:MgO:LiNbO3 channel waveguides,” J. Opt. Soc. Am. B 5(2), 292–299 (1988).
[Crossref]

C. Wang, M. J. Burek, Z. Lin, H. A. Atikian, V. Venkataraman, I. C. Huang, P. Stark, and M. Lončar, “Integrated high quality factor lithium niobate microdisk resonators,” Opt. Express 22(25), 30924–30933 (2014).
[Crossref]

P. Mackwitz, M. Rüsing, G. Berth, A. Widhalm, K. Müller, and A. Zrenner, “Periodic domain inversion in x-cut single-crystal lithium niobate thin film,” Appl. Phys. Lett. 108(15), 152902 (2016).
[Crossref]

A. Boes, B. Corcoran, L. Chang, J. Bowers, and A. Mitchell, “Status and potential of lithium niobate on insulator (LNOI) for photonic integrated circuits,” Laser Photonics Rev. 12(4), 1700256 (2018).
[Crossref]

V. Caciuc, A. V. Postnikov, and G. Borstel, “Ab initio structure and zone-center phonons in LiNbO3,” Phys. Rev. B 61(13), 8806–8813 (2000).
[Crossref]

M. D. Fontana and P. Bourson, “Microstructure and defects probed by Raman spectroscopy in lithium niobate crystals and devices,” Appl. Phys. Rev. 2(4), 040602 (2015).
[Crossref]

A. Boes, B. Corcoran, L. Chang, J. Bowers, and A. Mitchell, “Status and potential of lithium niobate on insulator (LNOI) for photonic integrated circuits,” Laser Photonics Rev. 12(4), 1700256 (2018).
[Crossref]

J. J. Lu, J. B. Surya, X. W. Liu, A. W. Bruch, Z. Gong, Y. T. Xu, and H. X. Tang, “Periodically poled thin film lithium niobate microring resonators with a second-harmonic generation efficiency of 250,000%/W,” Optica 6(12), 1455–1460 (2019).
[Crossref]

C. Wang, M. J. Burek, Z. Lin, H. A. Atikian, V. Venkataraman, I. C. Huang, P. Stark, and M. Lončar, “Integrated high quality factor lithium niobate microdisk resonators,” Opt. Express 22(25), 30924–30933 (2014).
[Crossref]

V. Caciuc, A. V. Postnikov, and G. Borstel, “Ab initio structure and zone-center phonons in LiNbO3,” Phys. Rev. B 61(13), 8806–8813 (2000).
[Crossref]

Y. F. Niu, C. Lin, X. Y. Liu, Y. Chen, X. P. Hu, Y. Zhang, X. L. Cai, Y. X. Gong, Z. D. Xie, and S. N. Zhu, “Optimizing the efficiency of a periodically poled LNOI waveguide using in situ monitoring of the ferroelectric domains,” Appl. Phys. Lett. 116(10), 101104 (2020).
[Crossref]

A. Boes, B. Corcoran, L. Chang, J. Bowers, and A. Mitchell, “Status and potential of lithium niobate on insulator (LNOI) for photonic integrated circuits,” Laser Photonics Rev. 12(4), 1700256 (2018).
[Crossref]

L. Chang, Y. F. Li, N. Volet, L. R. Wang, J. Peters, and J. E. Bowers, “Thin film wavelength converters for photonic integrated circuits,” Optica 3(5), 531–535 (2016).
[Crossref]

J. Chen, Q. Z. Zhang, T. Han, L. Zhou, G. B. Tang, B. Q. Liu, and X. J. Ji, “Theoretical analysis of surface acoustic wave propagating properties of Y-cut nano lithium niobate film on silicon dioxide,” AIP Adv. 5(8), 087173 (2015).
[Crossref]

Z. H. Ma, J. Y. Chen, Z. Li, C. Tang, Y. M. Sua, H. Fan, and Y. P. Huang, “Ultrabright quantum photon sources on chip,” Phys. Rev. Lett. 125(26), 263602 (2020).
[Crossref]

J. Y. Chen, Z. H. Ma, Y. M. Sua, Z. Li, C. Tang, and Y. P. Huang, “Ultra-efficient frequency conversion in quasi-phase- matched lithium niobate microrings,” Optica 6(9), 1244–1245 (2019).
[Crossref]

Y. F. Niu, C. Lin, X. Y. Liu, Y. Chen, X. P. Hu, Y. Zhang, X. L. Cai, Y. X. Gong, Z. D. Xie, and S. N. Zhu, “Optimizing the efficiency of a periodically poled LNOI waveguide using in situ monitoring of the ferroelectric domains,” Appl. Phys. Lett. 116(10), 101104 (2020).
[Crossref]

D. Zhu, L. B. Shao, M. J. Yu, R. Cheng, B. Desiatov, C. J. Xin, Y. W. Hu, J. Holzgrafe, S. Ghosh, A. Shams-Ansari, E. Puma, N. Sinclair, C. Reimer, M. Zhang, and M. Lončar, “Integrated photonics on thin-film lithium niobate,” Adv. Opt. Photonics 13(2), 242–352 (2021).
[Crossref]

A. Rao, A. Patil, J. Chiles, M. Malinowski, S. Novak, K. Richardson, P. Rabiei, and S. Fathpour, “Heterogeneous microring and Mach-Zehnder modulators based on lithium niobate and chalcogenide glasses on silicon,” Opt. Express 23(17), 22746–22752 (2015).
[Crossref]

A. Boes, B. Corcoran, L. Chang, J. Bowers, and A. Mitchell, “Status and potential of lithium niobate on insulator (LNOI) for photonic integrated circuits,” Laser Photonics Rev. 12(4), 1700256 (2018).
[Crossref]

G. H. Shao, J. Song, Y. P. Ruan, G. X. Cui, and Y. Q. Lu, “Tunable dual-wavelength filter and its group delay dispersion in domain-engineered lithium niobite,” AIP Adv. 6(12), 125034 (2016).
[Crossref]

D. Zhu, L. B. Shao, M. J. Yu, R. Cheng, B. Desiatov, C. J. Xin, Y. W. Hu, J. Holzgrafe, S. Ghosh, A. Shams-Ansari, E. Puma, N. Sinclair, C. Reimer, M. Zhang, and M. Lončar, “Integrated photonics on thin-film lithium niobate,” Adv. Opt. Photonics 13(2), 242–352 (2021).
[Crossref]

C. Wang, C. Langrock, A. Marandi, M. Jankowski, M. Zhang, B. Desiatov, M. M. Fejer, and M. Lončar, “Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides,” Optica 5(11), 1438–1441 (2018).
[Crossref]

S. Reitzig, M. Rüsing, J. Zhao, B. Kirbus, S. Mookherjea, and L. M. Eng, “‘Seeing is believing’—In-depth analysis by co-imaging of periodically-poled x-cut lithium niobate thin films,” Crystals 11(3), 288 (2021).
[Crossref]

J. Zhao, M. Rüsing, M. Roeper, L. M. Eng, and S. Mookherjea, “Poling thin-film x-cut lithium niobate for quasi-phase matching with sub-micrometer periodicity,” J. Appl. Phys. 127(19), 193104 (2020).
[Crossref]

Z. H. Ma, J. Y. Chen, Z. Li, C. Tang, Y. M. Sua, H. Fan, and Y. P. Huang, “Ultrabright quantum photon sources on chip,” Phys. Rev. Lett. 125(26), 263602 (2020).
[Crossref]

A. Rao, M. Malinowski, A. Honardoost, J. R. Talukder, P. Rabiei, P. Delfyett, and S. Fathpour, “Second-harmonic generation in periodically-poled thin film lithium niobate wafer-bonded on silicon,” Opt. Express 24(26), 29941–29947 (2016).
[Crossref]

A. Rao, A. Patil, J. Chiles, M. Malinowski, S. Novak, K. Richardson, P. Rabiei, and S. Fathpour, “Heterogeneous microring and Mach-Zehnder modulators based on lithium niobate and chalcogenide glasses on silicon,” Opt. Express 23(17), 22746–22752 (2015).
[Crossref]

C. Wang, C. Langrock, A. Marandi, M. Jankowski, M. Zhang, B. Desiatov, M. M. Fejer, and M. Lončar, “Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides,” Optica 5(11), 1438–1441 (2018).
[Crossref]

M. M. Fejer, G. A. Magel, D. H. Jundt, and R. L. Fellow, “Quasi-phase-matched second harmonic generation: tuning and tolerances,” IEEE J. Quantum Electron. 28(11), 2631–2654 (1992).
[Crossref]

M. M. Fejer, G. A. Magel, D. H. Jundt, and R. L. Fellow, “Quasi-phase-matched second harmonic generation: tuning and tolerances,” IEEE J. Quantum Electron. 28(11), 2631–2654 (1992).
[Crossref]

M. D. Fontana and P. Bourson, “Microstructure and defects probed by Raman spectroscopy in lithium niobate crystals and devices,” Appl. Phys. Rev. 2(4), 040602 (2015).
[Crossref]

R. S. Weis and T. K. Gaylord, “Lithium niobate: summary of physical properties and crystal structure,” Appl. Phys. A 37(4), 191–203 (1985).
[Crossref]

D. Zhu, L. B. Shao, M. J. Yu, R. Cheng, B. Desiatov, C. J. Xin, Y. W. Hu, J. Holzgrafe, S. Ghosh, A. Shams-Ansari, E. Puma, N. Sinclair, C. Reimer, M. Zhang, and M. Lončar, “Integrated photonics on thin-film lithium niobate,” Adv. Opt. Photonics 13(2), 242–352 (2021).
[Crossref]

G. T. Xue, X. H. Tian, C. Zhang, Z. D. Xie, P. Xu, Y. X. Gong, and S. N. Zhu, “Effect of thickness variations of lithium niobate on insulator waveguide on the frequency spectrum of spontaneous parametric down-conversion,” Chin. Phys. B 30(11), 110313 (2021).
[Crossref]

Y. F. Niu, C. Lin, X. Y. Liu, Y. Chen, X. P. Hu, Y. Zhang, X. L. Cai, Y. X. Gong, Z. D. Xie, and S. N. Zhu, “Optimizing the efficiency of a periodically poled LNOI waveguide using in situ monitoring of the ferroelectric domains,” Appl. Phys. Lett. 116(10), 101104 (2020).
[Crossref]

J. J. Lu, J. B. Surya, X. W. Liu, A. W. Bruch, Z. Gong, Y. T. Xu, and H. X. Tang, “Periodically poled thin film lithium niobate microring resonators with a second-harmonic generation efficiency of 250,000%/W,” Optica 6(12), 1455–1460 (2019).
[Crossref]

B. N. Slautin, A. P. Turygin, E. D. Greshnyakov, A. R. Akhmatkhanov, H. Zhu, and V. Y. Shur, “Domain structure formation by local switching in the ion sliced lithium niobate thin films,” Appl. Phys. Lett. 116(15), 152904 (2020).
[Crossref]

G. Poberaj, H. Hu, W. Sohler, and P. Günter, “Lithium niobate on insulator (LNOI) for micro-photonic devices,” Laser Photonics Rev. 6(4), 488–503 (2012).
[Crossref]

J. Chen, Q. Z. Zhang, T. Han, L. Zhou, G. B. Tang, B. Q. Liu, and X. J. Ji, “Theoretical analysis of surface acoustic wave propagating properties of Y-cut nano lithium niobate film on silicon dioxide,” AIP Adv. 5(8), 087173 (2015).
[Crossref]

R. Luo, Y. He, H. X. Liang, M. G. Li, and Q. Lin, “Highly tunable efficient second-harmonic generation in a lithium niobate nanophotonic waveguide,” Optica 5(8), 1006–1011 (2018).
[Crossref]

R. Luo, H. W. Jiang, S. Rogers, H. X. Liang, Y. He, and Q. Lin, “On-chip second-harmonic generation and broadband parametric down-conversion in a lithium niobate microresonator,” Opt. Express 25(20), 24531–24539 (2017).
[Crossref]

D. Zhu, L. B. Shao, M. J. Yu, R. Cheng, B. Desiatov, C. J. Xin, Y. W. Hu, J. Holzgrafe, S. Ghosh, A. Shams-Ansari, E. Puma, N. Sinclair, C. Reimer, M. Zhang, and M. Lončar, “Integrated photonics on thin-film lithium niobate,” Adv. Opt. Photonics 13(2), 242–352 (2021).
[Crossref]

G. Poberaj, H. Hu, W. Sohler, and P. Günter, “Lithium niobate on insulator (LNOI) for micro-photonic devices,” Laser Photonics Rev. 6(4), 488–503 (2012).
[Crossref]

Y. F. Niu, C. Lin, X. Y. Liu, Y. Chen, X. P. Hu, Y. Zhang, X. L. Cai, Y. X. Gong, Z. D. Xie, and S. N. Zhu, “Optimizing the efficiency of a periodically poled LNOI waveguide using in situ monitoring of the ferroelectric domains,” Appl. Phys. Lett. 116(10), 101104 (2020).
[Crossref]

D. Zhu, L. B. Shao, M. J. Yu, R. Cheng, B. Desiatov, C. J. Xin, Y. W. Hu, J. Holzgrafe, S. Ghosh, A. Shams-Ansari, E. Puma, N. Sinclair, C. Reimer, M. Zhang, and M. Lončar, “Integrated photonics on thin-film lithium niobate,” Adv. Opt. Photonics 13(2), 242–352 (2021).
[Crossref]

C. Wang, M. J. Burek, Z. Lin, H. A. Atikian, V. Venkataraman, I. C. Huang, P. Stark, and M. Lončar, “Integrated high quality factor lithium niobate microdisk resonators,” Opt. Express 22(25), 30924–30933 (2014).
[Crossref]

Z. H. Ma, J. Y. Chen, Z. Li, C. Tang, Y. M. Sua, H. Fan, and Y. P. Huang, “Ultrabright quantum photon sources on chip,” Phys. Rev. Lett. 125(26), 263602 (2020).
[Crossref]

J. Y. Chen, Z. H. Ma, Y. M. Sua, Z. Li, C. Tang, and Y. P. Huang, “Ultra-efficient frequency conversion in quasi-phase- matched lithium niobate microrings,” Optica 6(9), 1244–1245 (2019).
[Crossref]

C. Wang, C. Langrock, A. Marandi, M. Jankowski, M. Zhang, B. Desiatov, M. M. Fejer, and M. Lončar, “Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides,” Optica 5(11), 1438–1441 (2018).
[Crossref]

J. Chen, Q. Z. Zhang, T. Han, L. Zhou, G. B. Tang, B. Q. Liu, and X. J. Ji, “Theoretical analysis of surface acoustic wave propagating properties of Y-cut nano lithium niobate film on silicon dioxide,” AIP Adv. 5(8), 087173 (2015).
[Crossref]

M. M. Fejer, G. A. Magel, D. H. Jundt, and R. L. Fellow, “Quasi-phase-matched second harmonic generation: tuning and tolerances,” IEEE J. Quantum Electron. 28(11), 2631–2654 (1992).
[Crossref]

S. Reitzig, M. Rüsing, J. Zhao, B. Kirbus, S. Mookherjea, and L. M. Eng, “‘Seeing is believing’—In-depth analysis by co-imaging of periodically-poled x-cut lithium niobate thin films,” Crystals 11(3), 288 (2021).
[Crossref]

C. Wang, C. Langrock, A. Marandi, M. Jankowski, M. Zhang, B. Desiatov, M. M. Fejer, and M. Lončar, “Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides,” Optica 5(11), 1438–1441 (2018).
[Crossref]

T. A. Ramadan, M. Levy, and R. M. Osgood, “Electro-optic modulation in crystal-ion-sliced z-cut LiNbO3 thin films,” Appl. Phys. Lett. 76(11), 1407–1409 (2000).
[Crossref]

Z. H. Ma, J. Y. Chen, Z. Li, C. Tang, Y. M. Sua, H. Fan, and Y. P. Huang, “Ultrabright quantum photon sources on chip,” Phys. Rev. Lett. 125(26), 263602 (2020).
[Crossref]

J. Y. Chen, Z. H. Ma, Y. M. Sua, Z. Li, C. Tang, and Y. P. Huang, “Ultra-efficient frequency conversion in quasi-phase- matched lithium niobate microrings,” Optica 6(9), 1244–1245 (2019).
[Crossref]

R. Luo, Y. He, H. X. Liang, M. G. Li, and Q. Lin, “Highly tunable efficient second-harmonic generation in a lithium niobate nanophotonic waveguide,” Optica 5(8), 1006–1011 (2018).
[Crossref]

R. Luo, H. W. Jiang, S. Rogers, H. X. Liang, Y. He, and Q. Lin, “On-chip second-harmonic generation and broadband parametric down-conversion in a lithium niobate microresonator,” Opt. Express 25(20), 24531–24539 (2017).
[Crossref]

Y. F. Niu, C. Lin, X. Y. Liu, Y. Chen, X. P. Hu, Y. Zhang, X. L. Cai, Y. X. Gong, Z. D. Xie, and S. N. Zhu, “Optimizing the efficiency of a periodically poled LNOI waveguide using in situ monitoring of the ferroelectric domains,” Appl. Phys. Lett. 116(10), 101104 (2020).
[Crossref]

R. Luo, Y. He, H. X. Liang, M. G. Li, and Q. Lin, “Highly tunable efficient second-harmonic generation in a lithium niobate nanophotonic waveguide,” Optica 5(8), 1006–1011 (2018).
[Crossref]

R. Luo, H. W. Jiang, S. Rogers, H. X. Liang, Y. He, and Q. Lin, “On-chip second-harmonic generation and broadband parametric down-conversion in a lithium niobate microresonator,” Opt. Express 25(20), 24531–24539 (2017).
[Crossref]

C. Wang, M. J. Burek, Z. Lin, H. A. Atikian, V. Venkataraman, I. C. Huang, P. Stark, and M. Lončar, “Integrated high quality factor lithium niobate microdisk resonators,” Opt. Express 22(25), 30924–30933 (2014).
[Crossref]

J. Chen, Q. Z. Zhang, T. Han, L. Zhou, G. B. Tang, B. Q. Liu, and X. J. Ji, “Theoretical analysis of surface acoustic wave propagating properties of Y-cut nano lithium niobate film on silicon dioxide,” AIP Adv. 5(8), 087173 (2015).
[Crossref]

J. J. Lu, J. B. Surya, X. W. Liu, A. W. Bruch, Z. Gong, Y. T. Xu, and H. X. Tang, “Periodically poled thin film lithium niobate microring resonators with a second-harmonic generation efficiency of 250,000%/W,” Optica 6(12), 1455–1460 (2019).
[Crossref]

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