1. X. Ji, D. Mojahed, Y. Okawachi, A. L. Gaeta, C. P. Hendon, and M. Lipson, “Millimeter-scale chip-based supercontinuum generation for optical coherence tomography”, Science Advances 7, eabg8869 (2021). (IF: 14.136 JCR: Q1)
2. X. Ji, J. K. Jang, U. D. Dave, C. Joshi, M. C. Zanarella, A. L. Gaeta, and M. Lipson, “Exploiting ultralow multimode waveguides for broadband frequency combs”, Laser & Photonics Reviews 15 (1), 2000353 (2021). (IF: 13.138 JCR: Q1)
3. X. Ji, S. P. Roberts, M. C. Zanarella and M. Lipson, “Methods to Achieve Ultra-high Quality Factor Silicon Nitride Resonators”, APL Photonics 6, 071101 (2021). (Featured Article) (IF: 5.672 JCR: Q1)
4. X. Ji, X. Yao, Y. Gan, A. Mohanty, M. Tadayon, C. P. Hendon, and M. Lipson, “On-chip tunable photonic delay line”, APL Photonics 4, 090803 (2019). (Featured Article) (IF: 5.672 JCR: Q1)
5. X. Ji, X. Yao, A. Klenner, Y. Gan, A.L. Gaeta, C. P. Hendon, and M. Lipson, “Chip-based frequency combs sources for optical coherence tomography,” Optics Express 27, 19896-19905 (2019). (IF: 3.894 JCR: Q1)
6. X. Ji, F. A. S. Barbosa, S. P. Roberts, A. Dutt, J. Cardenas, Y. Okawachi, A. Bryant, A. L. Gaeta, and M. Lipson, “Ultra-low-loss on-chip resonators with sub-milliwatt parametric oscillation threshold,” Optica 4, 619-624 (2017). (ESI Highly Cited Paper).(IF: 11.104 JCR: Q1)
7. B. Stern, X. Ji, Y. Okawachi, A. L. Gaeta, and M. Lipson, “Battery-operated integrated frequency comb generator,” Nature 562, 401-405 (2018). (ESI Highly Cited Paper)(IF: 49.962 JCR: Q1)
8. G. Liang, H. Huang, A. Mohanty, M. C. Shin, X. Ji, M. J. Carter, S. Shrestha, M. Lipson, N. Yu,“Robust, efficient, micrometre-scale phase modulators at visible wavelengths”, Nature Photonics 15, 908-913 (2021). (IF: 38.771 JCR: Q1)
9. Y. Okawachi, B. Y. Kim, Y. Zhao, X. Ji, M. Lipson, and A. L. Gaeta, “Dynamic control of photon lifetime for quantum random number generation”,Optica8, 1458-1461 (2021). (IF:11.104 JCR: Q1)
10. R. R. Domeneguetti, Y. Zhao, X. Ji, M. Martinelli, M. Lipson, A. L. Gaeta and P. Nussenzveig, “Parametric sideband generation in CMOS-compatible oscillators from visible to telecom wavelengths,” Optica 8, 316-322 (2021). (IF: 11.104 JCR: Q1)
11. R. Oliver, Y. Okawachi, X. Ji, A. R. Johnson, A. Klenner, M. Lipson, and A. L. Gaeta, "Soliton-effect compression of picosecond pulses on a photonic chip," Optics Letters 46, 4706-4709 (2021). (IF: 3.776 JCR: Q1)
12. J. K. Jang, Y. Okawachi, Y. Zhao, X. Ji, C. Joshi, M. Lipson, and A. L. Gaeta, "Conversion efficiency of soliton Kerr combs," Optics Letters 46, 3657-3660 (2021). (IF: 3.776 JCR: Q1)
13. Y. Zhao, X. Ji, B. Y. Kim, P. S. Donvalkar, J. K. Jang, C. Joshi, M. Yu, C. Joshi, R. R. Domeneguetti, F. A. S. Barbosa, P. Nussenzveig, Y. Okawachi, M. Lipson, and A. L. Gaeta, “Visible nonlinear photonics via high-order-mode dispersion engineering,” Optica 7, 135-141 (2020). (IF: 11.104 JCR: Q1)
14. Y. Okawachi, M. Yu, J. K. Jang, X. Ji, Y. Zhao, B. Y. Kim, M. Lipson, and A. L. Gaeta, “Demonstration of chip-based coupled degenerate optical parametric oscillators for realizing a nanophotonic spin-glass”, Nature Communications 11, 4119 (2020). (IF: 14.919 JCR: Q1)
15. C. Joshi, A. Farsi, A. Dutt, B. Y. Kim, X. Ji, Y. Zhao, A. M. Bishop, M. Lipson, and A. L. Gaeta, “Frequency-Domain Quantum Interference with Correlated Photons from an Integrated Microresonator,” Phys. Rev. Lett.124 (14), 143601 (2020). (IF: 9.161 JCR: Q1)
16. Y. Zhao, Y. Okawachi, J. K. Jang, X. Ji, M. Lipson, and A. L. Gaeta, “Near-degenerate quadrature-squeezed vacuum generation on a silicon-nitride chip,” Phys. Rev. Lett.124 (19), 193601 (2020). (IF: 9.161 JCR: Q1)
17. L. M. Krüger, A. S. Mayer, Y. Okawachi, X. Ji, A. Klenner, A. R. Johnson, C. Langrock, M. M. Fejer, M. Lipson, A. L Gaeta, V. J. Wittwer, T. Südmeyer, C. R. Phillips and U. Keller, “Performance scaling of a 10-GHz solid-state laser enabling self-referenced CEO frequency detection without amplification,” Optics Express 28, 12755-12770 (2020). (IF: 3.894 JCR: Q1)
18. M. C. Shin, A. Mohanty, K. Watson, G. R. Bhatt, C. T. Phare, S. A. Miller, M. Zadka, B. S. Lee, X. Ji, I. Datta, and M. Lipson, “Chip-scale blue light phased array,” Optics Letters 45 (7), 1934-1937 (2020). (IF: 3.776 JCR: Q1)
19. S. A. Miller, Y. C. Chang, C. T. Phare, M. C. Shin, M. Zadka, S. P. Roberts, B. Stern, X. Ji, A. Mohanty, O. A. J. Gordillo, U. Dave, M. Lipson, “Large-scale optical phased array using a low-power multi-pass silicon photonic platform,” Optica 7 (1), 3-6 (2020). (ESI Highly Cited Paper)(IF: 11.104 JCR: Q1)
20. A. Mohanty, Q. Li, M. A. Tadayon, S. P. Roberts, G. R. Bhatt, E. Shim, X. Ji, J. Cardenas, S. A. Miller, A. Kepecs, M. Lipson, “Reconfigurable nanophotonic silicon probes for sub-millisecond deep-brain optical stimulation,” Nat Biomed Eng (2020). (IF: 25.671 JCR: Q1)
21. J. K. Jang, X. Ji, C. Joshi, Y.Okawachi, M. Lipson, and A. L. Gaeta, “Observation of Arnold Tongues in Coupled Soliton Kerr Frequency Combs”, Phys. Rev. Lett. 123, 153901 (2019). (IF: 9.161 JCR: Q1)
22. B.Y. Kim, Y. Okawachi, J. K. Jang, M. Yu, X. Ji, Y. Zhao, C. Joshi, M. Lipson, and A. L. Gaeta, “Turn-key, high-efficiency Kerr comb source”, Optics Letters 44, 4475-4478 (2019). (IF: 3.776 JCR: Q1)
23. D. Waldburger, A. S. Mayer, C. G. E. Alfieri, J. Nürnberg, A. R. Johnson, X. Ji, A. Klenner, Y. Okawachi, M. Lipson, A. L. Gaeta, and U. Keller, “Tightly locked optical frequency comb from a semiconductor disk laser,” Optics Express 27, 1786-1797 (2019). (IF: 3.894 JCR: Q1)
24. S. Ramelow, A. Farsi, Z. Vernon, S. Clemmen, X. Ji, J. E. Sipe, M. Liscidini, M. Lipson, and A. L. Gaeta, “Strong Nonlinear Coupling in a Si3N4 Ring Resonator,” Phys. Rev. Lett. 122, 153906 (2019). (IF: 9.161 JCR: Q1)
25. J. K. Jang, A. Klenner, X, Ji, Y. Okawachi, M. Lipson, and A. L. Gaeta, “Synchronization of coupled optical microresonators”, Nature Photonics 12, 688-693 (2018). (IF: 38.771 JCR: Q1)
26. M. Yu, Y. Okawachi, C. Joshi, X. Ji, M. Lipson, and A. L. Gaeta, “Gas-phase microresonator based comb spectroscopy without an external pump laser,” ACS Photonics5 (7), 2780-2785 (2018). (IF: 7.529 JCR: Q1)
27. A. Dutt, C. Joshi, X. Ji, J. Cardenas, Y. Okawachi, K. Luke, A. L. Gaeta, and M. Lipson, “On-chip dual-comb source for spectroscopy,” Science advances 4 (3), e1701858 (2018). (ESI Highly Cited Paper)(IF: 14.136 JCR: Q1)
28. C. Joshi, A. Klenner, Y. Okawachi, M. Yu, K. Luke, X. Ji, M. Lipson, A. L. Gaeta, “Counter-rotating cavity solitons in a silicon nitride microresonator,” Optics Letters 43 (3), 547-550 (2018).(IF: 3.776 JCR: Q1)
29. Y. Okawachi, M. Yu, J. Cardenas, X. Ji, A. Klenner, M. Lipson, and A. L. Gaeta, “Carrier envelope offset detection via simultaneous supercontinuum and second-harmonic generation in a silicon nitride waveguide”, Optics Letters 43, 4627-4630 (2018). (IF: 3.776 JCR: Q1)
30. B. Stern, X. Ji, A. Dutt, M. Lipson, “Compact narrow-linewidth integrated laser based on a low-loss silicon nitride ring resonator,” Optics Letters 42 (21), 4541-4544 (2017). (IF: 3.776 JCR: Q1)
31. S. A. Miller, M. Yu, X. Ji, A. G. Griffith, J. Cardenas, A. L. Gaeta, and M. Lipson, "Low-loss silicon platform for broadband mid-infrared photonics," Optica 4, 707-712 (2017).(IF: 11.104 JCR: Q1)
32. M. Yu, J.K. Jang, Y. Okawachi, A.G Griffith, K. Luke, S.A. Miller, X. Ji, M. Lipson, and A. L. Gaeta, “Breather soliton dynamics in microresonators,” Nature Communications 8, 14569 (2017). (IF: 14.919 JCR: Q1)
33. Y. Okawachi, M. Yu, J. Cardenas, X. Ji, M. Lipson, A. L. Gaeta, “Coherent, directional supercontinuum generation,” Optics Letters 42 (21), 4466-4469 (2017). (IF: 3.776 JCR: Q1)
34. J. K. Jang, Y. Okawachi, M. Yu, K. Luke, X. Ji, M. Lipson, and A. L. Gaeta, “Dynamics of mode-coupling-induced microresonator frequency combs in normal dispersion,” Opt. Express 24, 28794-28803 (2016). (IF: 3.894 JCR: Q1)
35. C. Joshi, J. K. Jang, K. Luke, X. Ji, S. A. Miller, A. Klenner, Y. Okawachi, M. Lipson, and A. L. Gaeta, “Thermally controlled comb generation and soliton modelocking in microresonators,” Optics Letters 41, 2565-2568 (2016).(ESI Highly Cited Paper) (IF: 3.776 JCR: Q1)
36. C. Liang, Y. Wang, D. Li, X. Ji, F. Zhang, and Z. He, "Modeling and simulation of bulk heterojunction polymer solar cells," Sol. Energy Mater. Sol. Cells 127, 67–86 (2014). (IF: 7.267 JCR: Q1)
