(* indicates correspondence; † indicates equal contribution)
Under review/Preprint
47. N. Zhou, T. Huang, H. Y. Li, J. You, J. Zhang, Y. Nie, Q. Zhang, C. Huang, Z. Gao, J. Zhu, Q. Zhan, J. B. Xu, N. X. Fang*, and R. Zhou*,"Phase amplification microscopy towards femtometer accuracy," [Preprint Link]
46. M. Luo, M. Jiang, B. J. Shastri, N. Zhou, W. Guo, J. Xiong, D. Wang, R. Zhou, C. Shu, Q. Dou, and C. Huang*, “Large-scale artificial intelligence with 41 million nanophotonic neurons on a metasurface,” [Preprint Link]
45. Q. Zhang, H. Yue, N. Liu, D. Xu, R. Zhou, L. Cao, and G. Barbastathis*, “Decorrelation in Complex Wave Scattering,” [Preprint Link]
44. H. Zhu†, Y. Sun†, X. Yang, E. He, L. Yin, H. Wu, M. Cai, Y. Han, R. Zhou*, C. Kuang*, and X. Liu, “SMILE: a universal tool for modulated-enhanced localization microscopy to achieve minimal three-dimensional resolution,” [Preprint Link]
43. B. Ge† , Y. He† , M. Deng† , M. H. Rahman, Y. Wang, Z. Wu, Y. Yang, C. Kuang, C. H. N. Wong, M. K. Chan, Y. P. Ho, L. Duan, Z. Yaqoob, P. T. C. So*, G. Barbastathis*, and R. Zhou*, "xSCYTE: Express Single-frame Cytometer through Tomographic Phase," [Preprint Link]
2025
42. P. Peng, X. Liu, S. Yang, R. Zhou, H. Deng, L. Gao, N. X. Fang*, S. Liu*, and J. Zhu*, “Anomalous photoelectrochemical etching of undoped semiconductor surfaces,” Nat. Commun. 16, 7885 (2025) [Link]
41. G. Zhao†*, X. Shu†, and R. Zhou, “High-performance real-world optical computing trained by in situ gradient-based model-free optimization,” IEEE Transactions on Pattern Analysis and Machine Intelligence 47, 7194-7205 (2025) [Link]
40. X. Shu, M. Niu, Y. Zhang, W. Luo, and R. Zhou*, “Neural Architecture Search Generated Phase Retrieval Net for Real-Time Off-Axis Quantitative Phase Imaging,” IEEE Photonics Technology Letters 37, 1069-1072 (2025) [Link]
39. Z. Wang, Y. Li, D. Sun, Y. Nie, R. Zhou, M. Long, L. Liu, and Y. Yang*, “Pixel super-resolution using compressive sensing for interferometric quantitative phase imaging,” Optics and Lasers in Engineering 193, 109045 (2025) [Link]
38. J. Zhang, R. Zhou, N. X. Fang, W. Deng, J. Zhu*, and S. Liu*, “Experimental Demonstration of Conjugate Structured Illumination Microscopy (c-SIM) for Sensing Deep Subwavelength Perturbations in Background Nanopatterns,” ACS Photonics 12, 2710-2719 (2025) [Link]
37. W. Tao, S. Zhao, H. Dong, Z. Zhang, P. Ji, S. Qin, W. Hu, J. Zhu, R. Zhou, and S. Yang*, “An optical carbon nanotube fibre probe for measurement of nano structures with large aspect ratio,” Nano Research 18, 94907254 (2025) [Link]
36. Y. Sun†, H. Zhu†, X. Yang, E. He, H. Wu, L. Yin, W. Sun, X. Luo, Y. Han, X. Hao, R. Zhou, C. Kuang*, and X. Liu, “Fluorescence Interference-Based Polarized Structured Illumination Microscopy for High Axial Accuracy Morphology Imaging of Dipole Orientations,” ACS Photonics 12, 419-428 (2025) [Link]
35. [Memoriam Article] C. Hu, X. Chen, and R. Zhou*, “Our journey with Prof. Gabriel Popescu in quantitative phase imaging: in memoriam,” JOSA A 42, ED1-ED5 (2025) [Link]
2024
34. N. Zhou, M. Wu, Y. Nie, J. Cheng, and R. Zhou*, “Recent advances and applications of high-sensitivity interferometric quantitative phase microscopy (cover paper·invited),” Infrared and Laser Engineering 53, 20240358 (2024); (in Chinese) [Link]
33. X. Zhao, H. Jiang, J. Liu, C. Liu, H. Deng, R. Zhou, N. X. Fang, S. Liu*, and J. Zhu*, “Direct Monitoring of Nanoscale Deformations across All Layers in Three-Dimensional Stacked Structures,” ACS Photonics 11, 3672-3679 (2024) [Link]
32. Y. Yan, X. Xiao, Q. Nie, Z. Wang, Y. Chen, J. Wu, N. Zhou, R. Zhou, S. Yang*, and W. Ren*, “Nanoliter-Scale Light–Matter Interaction in a Fiber-Tip Cavity Enables Sensitive Photothermal Gas Detection,” Laser & Photonics Rev. 18, 2400907 (2024) [Link]
31. M. Niu, Y. Wang, L. Duan, R. Sun, and R. Zhou*, “Compact Morpho-molecular Microscopy for Live-cell Imaging and Material Characterization,” Laser & Photonics Rev. 18, 2300741 (2024) [Link]
30. K. Wang*, L. Song, C. Wang, Z. Ren, G. Zhao, J. Dou, J. Di, G. Barbastathis, R. Zhou, J. Zhao*, and E. Y. Lam*, “On the use of deep learning for phase recovery,” Light: Science & Applications 13, 4 (2024) [Link]
2023
29. Y. Sun†, H. Zhu†, L. Yin, H. Wu, M. Cai, W. Sun, Y. Xu, X. Yang, J. Han, W. Liu, Y. Han, X. Hao, R. Zhou, C. Kuang*, and X. Liu, “Fluorescence interference structured illumination microscopy for 3D morphology imaging with high axial resolution,” Advanced Photonics 5, 056007 (2023) [Link]
28. S. Kang, R. Zhou*, M. Brelen, H. K. Mak, P. T. C. So, and Z. Yaqoob*, “Mapping nanoscale topographic features in thick tissues with speckle diffraction tomography,” Light: Science & Applications 12, 200 (2023) [Link]
27. D. Lyu, W. Xu, N. Zhou, W. Duan, Z. Wang, Y. Mu, R. Zhou, and Y. Wang*, “Biomimetic Thermoresponsive Superstructures by Colloidal Soft-and-Hard Co-Assembly,” Science Advances 9, eadh2250 (2023) [Link]
26. Q. Xiao, Y. He, M. H. Rahman, G. Cheng, R. Zhou, and Y. P. Ho*, “Quantitative Phase Deformability Cytometry for Noninvasive High-throughput Characterization of Cells,” View 4, 20220049 (2023) [Link]
25. T. Wang, P. Shi, D. Luo, J. Guo, H. Liu, J. Yuan, H. Jin, X. Wu, Y. Zhang, Z. Xiong, J. Zhu, R. Zhou, and R. Zhang*, “A convenient all-cell optical imaging method compatible with serial SEM for brain mapping,” Brain Sciences 13, 711 (2023) [Link]
24. Y. Nie†, N. Zhou†, L. Tao, J. Zhu, Z. Gao, J. Xu, and R. Zhou*, “Transmission-matrix Quantitative Phase Profilometry for Accurate and Fast Thickness Mapping of 2D Materials,” ACS Photonics 10, 1084-1092 (2023) [Link]
23. Y. He, N. Zhou, M. Ziemczonok, Y. Wang, L. Lei, L. Duan, and R. Zhou*, “Standardizing image assessment in optical diffraction tomography,” Opt. Lett. 48, 395-398 (2023) [Link]
22. G. Luo, Y. He, X. Shu, R. Zhou, and T. Blu*, “Complex Wave and Phase Retrieval from A Single Off-Axis Interferogram,” JOSA A 40, 85-95 (2023) [Link]
2022
21. Y. He†, Q. Shao†, S. C. Chen*, and R. Zhou*, “Characterization of Two-photon Photopolymerization Fabrication using High-speed Optical Diffraction Tomography,” Additive Manufacturing 60, 103293 (2022) [Link]
20. N. Zhou†, A. Zheng†, K. K. Y. Wong, and R. Zhou*, “High Resolution Quantitative Phase Microscopy with Second-Harmonic Generation and Structured Illumination from k-Space Formulation,” Physical Review Applied 18, 054028 (2022) [Link]
19. Y. Wang†, M. Liu†, Q. Wei, W. Wu, Y. He, J. Gao, R. Zhou, L. Jiang, J. Qu, and J. Xia*, “Phase-Separated Multienzyme Compartmentalization for Terpene Biosynthesis in a Prokaryote,” Angew. Chem. Int. Ed. 61, e202203909 (2022) [Link]
18. [Perspective Article] J. Zhu*, N. Zhao, S. Liu, S. Wei, and R. Zhou*, “Towards new forms of particle sensing and manipulation and 3D imaging on a smartphone for healthcare applications,” Advanced Photonics Research 3, 2100106 (2022) [Link] (the article was selected to be included in the Special Issue: New Photonics Trends in Sensing (and Photovoltaics) towards IOT & E-Smart Labels)
17. J. Zhu†*, J. Liu†, T. Xu†, S. Yuan, Z. Zhang, H. Jiang, H. Gu, R. Zhou, and S. Liu*, “Optical Wafer Defect Inspection at the 10 nm Technology Node and Beyond,” Int. J. Extrem. Manuf. 4 032001 (2022) [Link]
16. M. Cai†, H. Zhu†, Y. Sun, L. Yin, F. Xu, H. Wu, X. Hao, R. Zhou, C. Kuang*, and X. Liu, “Total variation and spatial iteration-based 3D structured illumination microscopy,” Opt. Express 30, 7938-7953 (2022) [Link]
15. H. Fan, D. Luo, J. Zhu, R. L. Schalek, Z. Chen, L. Zhao, R. Zhou, M. Sun, G. Shi, Y. Xie, J. W. Lichtman, and R. Zhang*, “Optical Multi-Layer Interference Tomography Compatible with Tape-Based Serial SEM for Mesoscale Neuroanatomy,” ACS Photonics 9, 25-33 (2022) [Link] (the article was selected as a cover of the issue)
2021
14. B. Ge†, Q. Zhang†, R. Zhang, J. T. Lin, P. H. Tseng, C. W. Chang, C. Y. Dong, R. Zhou, Z. Yaqoob, I. Bischofberger, and P. T. C. So*, “Single-shot quantitative polarization imaging of complex birefringent structure dynamics,” ACS Photonics 8, 3440-3447 (2021) [Link]
13. Y. Xiao, S. Wei, S. Xue, C. Kuang, A. Yang, M. Wei, H. Lin, and R. Zhou*, “High-Speed Fourier Ptychographic Microscopy for Quantitative Phase Imaging,” Opt. Lett. 46, 4785-4788 (2021) [Link]
12. C. Li, R. Zhou, W. Wang, Z. Zhan, Z. Zhang, Y. Li, Y. Li, X. Hao, C. Kuang*, and X. Liu, “Background suppression with dual modulation by saturated absorption competition microscopy,” Optics and Lasers in Engineering 147, 106750 (2021) [Link]
11. X. Shu†, S. Sansare†, D. Jin, X. Zeng, K. Y. Tong, R. Pandey*, and R. Zhou*, “Artificial‐Intelligence‐Enabled Reagent‐Free Imaging Hematology Analyzer,” Advanced Intelligent Systems 3, 2000277 (2021); Inside Front Cover [Link]
10. Y. Nie and R. Zhou*, “Beating Temporal Phase Sensitivity Limit in Off-axis Interferometry based Quantitative Phase Microscopy,” APL Photonics 6, 011302 (2021) [Link]
2020
9. C. Zheng, D. Jin, Y. He, H. Lin, J. Hu, Z. Yaqoob, P. T. C. So, and R. Zhou*, “High Spatial and Temporal Resolution Synthetic Aperture Phase Microscopy,” Advanced Photonics 2, 065002 (2020) [Link] (the article was featured on SPIE News, EurekAlert, ScienceDaily, Photonics Spectra, etc.)
8. M. Niu, G. Luo, X. Shu, F. Qu, S. Zhou, Y. P. Ho, N. Zhao, and R. Zhou*, “Portable Quantitative Phase Microscope for Material Metrology and Biological Imaging,” Photonics Research 8, 1253-1259 (2020) [Link]
2019
7. J. Zhu, Y. Liu, X. Yu, R. Zhou, J. M. Jin, and L. L. Goddard*, “Sensing Sub-10 nm Wide Perturbations in Background Nanopatterns Using Optical Pseudoelectrodynamics Microscopy (OPEM),” Nano Lett. 19, 5347-5355 (2019) [Link]
6. S. Purandare*, J. Zhu, R. Zhou, G. Popescu, A. Schwing, and L. L. Goddard, “Optical inspection of nanoscale structures using a novel machine learning based synthetic image generation algorithm,” Opt. Express 27, 17743-17762 (2019) [Link]
5. R. Pandey*, R. Zhou*, R. Bordett, C. Hunter, K. Glunde, I. Barman, T. Valdez, and C. Finck, “Integration of Diffraction Phase Microscopy and Raman Imaging for Label-free Morpho-molecular Assessment of Live Cells,” Journal of Biophotonics 12, e201800291 (2019) [Link]
4. J. Zhu, R. Zhou, L. Zhang, B. Ge, C. Luo, and L. L. Goddard*, “Regularized pseudo-phase imaging for inspecting and sensing nanoscale features,” Opt. Express 27, 6719-6733 (2019) [Link]
2018
3. B. Ge†, R. Zhou†*, Y. Takiguchi, Z. Yaqoob*, and P. T. C. So, “Single-shot Optical Anisotropy Imaging with Quantitative Polarization Interference Microscopy,” Laser & Photonics Rev. 12, 1800070 (2018) [Link]
2. G. Zhao†, C. Zheng†, C. Kuang*, R. Zhou, M. M. Kabir, K. C. Toussaint Jr., W. Wang, L. Xu, H. Li, P. Xiu, and X. Liu*, “Nonlinear Focal Modulation Microscopy,” Phys. Rev. Lett. 120, 193901 (2018) [Link] (selected as the Cover of the Issue)
1. D. Jin†, R. Zhou†*, Z. Yaqoob, and P. T. C. So, “Dynamic spatial filtering using a digital micromirror device for high-speed optical diffraction tomography,” Opt. Express 26, 428-437 (2018) [Link]
2017
25. C. Zheng†, R. Zhou†, C. Kuang*, G. Zhao, Z. Zhang, and X. Liu., “Diffraction phase microscopy realized with an automatic digital pinhole,” Opt. Commun. 404, 5-10 (2017) [Link]
24. [Invited Paper] D. Jin†, R. Zhou†*, Z. Yaqoob, and P. T. C. So, “Tomographic Phase Microscopy: Principles and Applications in Bioimaging,” JOSA B 34, B64-B77 (2017); Special Issue on Digital Holography, Editor’s Pick [Link]
23. C. Zheng†, R. Zhou†*, C. Kuang, G. Zhao, Z. Yaqoob, and P. T. C. So, “Digital micromirror device-based common-path quantitative phase imaging,” Opt. Lett. 42, 1448-1451 (2017) [Link]
22. R. Zhou, D. Jin, P. Hosseini, V. R. Singh, Y. Kim, C. Kuang, R. R. Dasari, Z. Yaqoob, and P. T. C. So*, “Modeling the depth-sectioning effect in reflection-mode dynamic speckle-field interferometric microscopy,” Opt. Express 25, 130-143 (2017) [Link]
2016
21. Q. Liu, Y. Fang, R. Zhou, C. Kuang, and X. Liu*, “Surface wave illumination Fourier ptychographic microscopy,” Opt. Lett. 41, 5373-5376 (2016) [Link]
20. C. Kuang†*, Y. Ma†, R. Zhou, Y. Fang, Y. Xu, X. Liu*, and P. T. C. So, “Virtual 𝑘-Space Modulation Optical Microscopy,” Phys. Rev. Lett. 117, 028102 (2016) [Link]
19. P. Hosseini, R. Zhou, Y. H. Kim, C. Peres, A. Diaspro, C. Kuang, Z. Yaqoob, and P. T. C. So*, “Pushing phase and amplitude sensitivity limits in interferometric microscopy,” Opt. Lett. 41, 1656-1659 (2016) [Link]
18. T. Kim†, R. Zhou†, L. L. Goddard, and G. Popescu*, “Solving inverse scattering problems in biological samples by quantitative phase imaging,” Laser & Photonics Rev. 10, 13-39 (2016) [Link]
2015
17. C. Kuang, Y. Ma, R. Zhou*, J. Lee, G. Barbastathis, R. R. Dasari, Z. Yaqoob, and P. T. C. So, “Digital micromirror device-based laser-illumination Fourier ptychographic microscopy,” Opt. Express 23, 26999-27010 (2015) [Link]
16. S. You, C. Kuang*, K. C. Toussaint, R. Zhou, X. Xia, and X. Liu, “Iterative phase-retrieval method for generating stereo array of polarization-controlled focal spots,” Opt. Lett. 40, 3532-3535 (2015) [Link]
2014
15. [Invited Paper] C. Edwards, R. Zhou, S. W. Hwang, S. J. McKeown, K. Wang, B. Bhaduri, R. Ganti, P. J. Yunker, A. G. Yodh, J. A. Rogers, L. L. Goddard, and G. Popescu*, “Diffraction phase microscopy: monitoring nanoscale dynamics in materials science”, Appl. Opt. 53, G33-G43 (2014); Special Issue on Digital Holography [Link]
14. R. Zhou, T. Kim, L. L. Goddard, and G. Popescu*, “Inverse scattering solutions using low-coherence light,” Opt. Lett. 39, 4494-4497 (2014) [Link]
13. B. Bhaduri, C. Edwards, H. Pham, R. Zhou, T. H. Nguyen, L. L. Goddard, and G. Popescu*, “Diffraction phase microscopy: principles and applications in materials and life sciences,” Adv. Opt. Photon. 6, 57-119 (2014) [Link]
12. [Invited Paper] T. Kim†, R. Zhou†, L. L. Goddard, and G. Popescu*, “Breakthroughs in Photonics 2013: Quantitative Phase Imaging: Metrology Meets Biology” IEEE Photonics Journal 6, 0700909 (2014) [Link]
11. G. Rajshekhar, B. Bhaduri, C. Edwards, R. Zhou, L. L. Goddard, and G. Popescu*, “Nanoscale topography and spatial light modulator characterization using wide-field quantitative phase imaging,” Opt. Express 22, 3432-3438 (2014) [Link]
10. T. Kim†, R. Zhou†, M. Mir, S. D. Babacan, P. S. Carney, L. L. Goddard, and G. Popescu*, “White light diffraction tomography of unlabelled live cells,” Nat. Photon. 8, 256-263 (2014) [Link]
2013
9. T. Kim, R. Zhu, T. H. Nguyen, R. Zhou, C. Edwards, L. L. Goddard, and G. Popescu*, “Deterministic signal associated with a random field,” Opt. Express 21, 20806-20820 (2013) [Link]
8. R. Zhou, C. Edwards, A. Arbabi, G. Popescu, and L. L. Goddard*, “Detecting 20 nm wide defects in large area nanopatterns using optical interferometric microscopy,” Nano Lett. 13, 3716-3721 (2013) [Link]
7. C. Edwards, K. Wang, R. Zhou, G. Popescu, and L. L. Goddard*, “Digital projection photochemical etching defines gray-scale features,” Opt. Express 21, 13547-13554 (2013) [Link]
2012
6. R. Zhou, W. Shi*, E. Petersen, A. Chavez-Pirson, M. Stephen, and N. Peyghambarian, “Transform-Limited, Injection Seeded, Q-Switched, Ring Cavity Fiber Laser,” J. Lightwave Technol. 30, 2589-2595 (2012) [Link]
5. R. Zhou, Q. Zhan, P. E. Powers, B. Ibarra-Escamilla, and J. W. Haus*, “An all fiber based Talbot self-imaging mirror device for phase-locking of a multi-fiber laser,” J. Europ. Opt. Soc. Rap. Public. 7, 12012 (2012) [Link]
2011
4. B. Ibarra-Escamilla*, O. Pottiez, R. Zhou, Q. Zhan, P. E. Powers, E. A. Kuzin, and J. W. Haus, “Wavelength tunable high power laser using a double-clad Er:Yb doped fiber,” Laser Phys. 21, 1936-1940 (2011) [Link]
2010
3. R. Zhou, J. W. Haus, P. E. Powers, and Q. Zhan*, “Vectorial fiber laser using intracavity axial birefringence,” Opt. Express 18, 10839-10847 (2010) [Link]
2009
2. R. Zhou, B. Ibarra-Escamilla, Q. Zhan, P. E. Powers, and J. W. Haus*, “Self-phase modulation effects and pulse propagation in gain-guided fibers,” J. Europ. Opt. Soc. Rap. Public. 4, 09051 (2009) [Link]
1. R. Zhou, B. Ibarra-Escamilla, J. W. Haus, P. E. Powers, and Q. Zhan*, “Fiber Laser Generating Switchable Radially and Azimuthally Polarized Beams with 140 mW Output Power at 1.6 µm Wavelength,” Appl. Phys. Lett. 95, 191111 (2009) [Link]