Integrated Quantum Photonics Lab
Dr. Di Zhu | National University of Singapore
Publications
Journal Publications
In- review
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Y. Hu, D. Zhu, S. Lu, X. Zhu, Y. Song, D. Renaud, D. Assumpcao, R. Cheng, CJ Xin, M. Yeh, H. Warner, X. Guo, A. Shams-Ansari, D. Barton, N. Sinclair, M. Loncar, "Integrated electro-optics on thin-film lithium niobate," arXiv:2404.06398 (2024)
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S. An, D. Kalashnikov, W. Shi, Z. Mahfoud, A. B. Chew, Y. Liu, J. Wu, D. Zhu, W. Gao, C.-W. Qiu, V. Leong, Z. Dong, “Dielectric Fano Nanoantennas for Enabling Sub-Nanosecond Lifetimes in NV-based Single Photon Emitters,” arXiv:2407.03014 (2024)
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H. K. Warner, J. Holzgrafe, B. Yankelevich, D. Barton, S. Poletto, C.J. Xin, N. Sinclair, D. Zhu, E. Sete, B. Langley, E. Batson, M. Colangelo, A. Shams-Ansari, G. Joe, K. K. Berggren, L. Jiang, M. Reagor, and M. Loncar, "Coherent control of a superconducting qubit using light," arXiv:2310.16155 (2023)
In-print
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X. Shi*, S. S. Mohanraj*, V. Dhyani, A. A. Baiju, S. Wang, J. Sun, L. Zhou, A. Paterova, V. Leong, D. Zhu†, "Efficient photon-pair generation in layer-poled lithium niobate nanophotonic waveguides," Light: Science & Applications 13, 282 (2024)(2024)
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P. Aashna, H.-L. Lin, Y. Cao, Y. Yin, Y. Gao, S. S. Mohanraj, D. Zhu, A. Danner, “Periodic domain inversion in single crystal barium titanate-on-insulator thin film,” Advanced Science 2406248 (2024)
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S. Wang*, V. Dhyani*, S. S. Mohanraj, X. Shi, B. Varghese, W. W. Chung, D. Huang, Z. S. Lim, Q. Zeng, H. Liu, X. Luo, V. Leong, N. Li†, D. Zhu†, "CMOS-compatible photonic integrated circuits on thin-film ScAlN," APL Photonics 9, 066109 (2024)
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M. Colangelo, D. Zhu, L. Shao, J. Holzgrafe, E. K. Batson, B. Desiatov, O. Medeiros, M. Yeung, M. Loncar, and K. K. Berggren, "Molybdenum Silicide Superconducting Nanowire Single-Photon Detectors on Lithium Niobate Waveguides," ACS Photonics (2024)
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D. Renaud, D. R. Assumpcao, G. Joe, A. Shams-Ansari, D. Zhu, Y. Hu, N. Sinclair, M. Loncar, "Sub-1 Volt and High-Bandwidth Visible to Near-Infrared Electro-Optic Modulators," Nature Communications 14, 1496 (2023)
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E. Csányi, Y. Liu, S. D. Rezaei, H.Y.L. Lee, F. Tjiptoharsono, Z. Mahfoud, S. Gorelik, X. Zhao, L.J. Lim, D. Zhu, J. Wu, K.E.J. Goh, W. Gao, Z.‐K. Tan, G. Leggett, C.‐W. Qiu, Z. Dong, "Engineering and Controlling Perovskite Emissions via Optical Quasi-Bound-States-in-the-Continuum" Advanced Functional Materials, 2309539 (2023)
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Z. Li, X. Ma, F. Wei, D. Wang, Z. Deng, M. Jiang, A. Siddiquee, K. Qi, D. Zhu, M. Zhao, M. Shen, P. Canepa, S. Kou, J. Lin, Q. Wang, "As‐Grown Miniaturized True Zero‐Order Waveplates Based on Low‐Dimensional Ferrocene Crystals," Advanced Materials 35(32), 2302468 (2023)
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M. Colangelo, B. Korzh, J. P. Allmaras, A. D. Beyer, A. S. Mueller, R. M. Briggs, B. Bumble, M. Runyan, M. J. Stevens, A. N. McCaughan, D. Zhu, S. Smith, W. Becker, L. Narváez, J. C. Bienfang, S. Frasca, A. E. Velasco, C. H. Peña, E. E. Ramirez, A. B. Walter, E. Schmidt, E. E. Wollman, M. Spiropulu, R. Mirin, S. W. Nam, K. K. Berggren, M. D. Shaw, “Impedance-matched differential superconducting nanowire detectors,” Physical Review Applied 19, 044093 (2023) [Editor's Suggestion]
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D. Zhu*,†, C. Chen*, M. Yu*, L. Shao, Y. Hu, C. J. Xin, M. Yeh, S. Ghosh, L. He, C. Reimer, N. Sinclair, F. N. C. Wong, M. Zhang, and M. Loncar*, “Spectral control of nonclassical light pulses using an integrated thin-film lithium niobate modulator,” Light: Science & Applications 11, 327 (2022) [News coverage]
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M. Yu, D. Barton III, R. Cheng, C. Reimer, P. Kharel, L. He, L. Shao, D. Zhu, Y. Hu, H. R. Grant, L. Johansson, Y. Okawachi, A. L. Gaeta, M. Zhang & M. Lončar, “Integrated femtosecond pulse generator on thin-film lithium niobate,” Nature 612, 252–258 (2022) [news coverage]
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Y. Hu, M. Yu, N. Sinclair, D. Zhu, R. Cheng, C. Wang, M. Loncar, “Mirror-induced reflection in the frequency domain,” Nature Communications 13, 6293 (2022)
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Y. Hu, M. Yu, B. Buscaino, N. Sinclair, D. Zhu, R. Cheng, A. Shams-Ansari, L. Shao, M. Zhang, J. M. Kahn, M. Loncar, "High-efficiency and broadband on-chip electro-optic frequency comb generators," Nature Photonics 16, 379 (2022) [news coverage]
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L. Shao*, D. Zhu*, M. Colangelo, D. H. Lee, N. Sinclair, Y. Hu, P. T. Rakich, K. Lai, K. K. Berggren, M. Loncar, “Electrical control of surface acoustic waves,” Nature Electronics 5, 348-355 (2022) [News coverage]
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Y. Zhang, L. Shao, J. Yang, Z. Chen, K. Zhang, K.-M. Shum, D. Zhu†, C. H. Chan, M. Lončar, C. Wang†, Systematic investigation of millimeter-wave optic modulation performance in thin-film lithium niobate, Photonics Research 10(10) 2380 (2022)
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A. Shams-Ansari, G. Huang, L. He, Z. Li, J. Holzgrafe, M. Jankowski, M. Churaev, P. Kharel, R. Cheng, D. Zhu, N. Sinclair, B. Desiatov, M. Zhang, T. J. Kippenberg, M. Loncar, "Reduced Material Loss in Thin-film Lithium Niobate Waveguides," APL Photonics 7, 081301(2022) [Editor’s pick]
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A. Dane, J. Allmaras, D. Zhu, M. Onen, M. Colangelo, R. Bahgdadi, J.-L.Tambasco, Y. Morimoto, I. E. Forno, I. Charaev, Q. Zhao, M. Skvortsov, A. Kozorezov, K. Berggren, “Self-heating hotspots in superconducting nanowires cooled by phonon black-body radiation,” Nature Communications 13, 5429 (2022) [News coverage]
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C.J. Xin, J. Mishra, C. Chen, D. Zhu, A. Shams-Ansari, C. Langrock, N. Sinclair, F. N.C. Wong, M. M. Fejer, M. Lončar, “Spectrally separable photon-pair generation in dispersion engineered thin-film lithium niobate,” Optics Letters 47(11) 2830-2833 (2022) [Editors' Pick]
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A. Shams-Ansari, D. Renaud, R. Cheng, L. Shao, L. He, D. Zhu, M. Yu, H. R. Grant, L. Johansson, M. Zhang, M. Loncar, “Electrically-pumped high-power laser transmitter integrated on thin-film lithium niobate,” Optica 9(4) 408 (2022) [News coverage]
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Y. Hu, M. Yu, D. Zhu, N. Sinclair, A. Shams-Ansari, L. Shao, J. Holzgrafe, E. Puma, M. Zhang, M. Loncar, “On-chip electro-optic frequency shifters and beam splitters,” Nature 599, 587–593 (2021) [news coverage]
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D. Zhu†, L. Shao, M. Yu, R. Cheng, B. Desiatov, C. J. Xin, Y. Hu, J. Holzgrafe, S. Ghosh, A. Shams-Ansari, E. Puma, N. Sinclair, C. Reimer, M. Zhang, M. Lončar†, “Integrated photonics on thin-film lithium niobate,” Advances in Optics and Photonics 13(2), 242-352 (2021)
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M. Colangelo*, D. Zhu*, D. F. Santavicca, B. A. Butters, J. C. Bienfang, K. K. Berggren, “A compact and tunable forward coupler based on high-impedance superconducting nanowires” Physical Review Applied 15, 024064 (2021)
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M. Zheng, Y. Yang, D. Zhu, Z. Shu, K. K. Berggren, M. Soljacic, H. Duan, “Enhancing Plasmonic Spectral Tunability with Anomalous Material Dispersion,” Nano Letters 21(1), 91-98 (2021)
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M. Zhang, C. Wang, P. Kharel, D. Zhu, M. Lončar, “Integrated lithium niobate electro-optic modulators: when performance meets scalability,” Optica 8(5), 652-667 (2021)
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V. B. Verma, B. Korzh, A. B. Walter, A. E. Lita, R. M. Briggs, M. Colangelo, Y. Zhai, E. E. Wollman, A. D. Beyer, J. P. Allmaras, D. Zhu, E. Schmidt, A. G. Kozorezov, K. K. Berggren, R. P. Mirin, S. W. Nam, M. D. Shaw, “Single-photon detection in the mid-infrared up to 10 μm wavelength using tungsten silicide superconducting nanowire detectors,” APL Photonics 6, 056101 (2021)
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R. Baghdadi, E. Schmidt, S. Jahani, I. Charaev, M. GW Muller, M. Colangelo, D. Zhu, K. Ilin, A. D. Semenov, Z. Jacob, M. Siegel, K. K. Berggren, “Enhancing the Performance of Superconducting Nanowire-Based Detectors with High-Filling Factor by Using Variable Thickness,” Superconductor Science and Technology 34(3), 035010 (2021)
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L. Hallett, I. Charaev, A. Agarwal, A. Dane, M. Colangelo, D. Zhu, K. K. Berggren, “Superconducting MoN thin films prepared by DC reactive magnetron sputtering for nanowire single-photon detectors,” Superconductor Science and Technology 34(3), 035012 (2021)
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D. Zhu*,†, M. Colangelo*, C. Chen, B. A. Korzh, F. N.C. Wong, M. D. Shaw, K. K. Berggren†, “Resolving photon numbers using a superconducting nanowire with impedance-matching taper,” Nano Letters 20(5) 3858–3863 (2020).
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B. Korzh, Q.-Y. Zhao, J. P. Allmaras, S. Frasca, T. M. Autry, E. A. Bersin, A. D. Beyer, R. M. Briggs, B. Bumble, M. Colangelo, G. M. Crouch, A. E. Dane, T. Gerrits, A. E. Lita, F. Marsili, G. Moody, C. Peña, E. Ramirez, J. D. Rezac, N. Sinclair, M. J. Stevens, A. E. Velasco, V. B. Verma, E. E. Wollman, S. Xie, D. Zhu, P. D. Hale, M. Spiropulu, K. L. Silverman, R. P. Mirin, S. W. Nam, A. G. Kozorezov, M. D. Shaw & K. K. Berggren, “Demonstration of sub-3 ps temporal resolution with a superconducting nanowire single-photon detector,” Nature Photonics 14, 250-255 (2020) [news coverage]
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J. Holzgrafe, N. Sinclair, D. Zhu, A. Shams-Ansari, M. Colangelo, Y. Hu, M. Zhang, K. K. Berggren, M. Lončar, “Cavity electro-optics in thin-film lithium niobate for efficient microwave-to-optical transduction,” Optica 7(12), 1714-1720 (2020)
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X. Wang, B. A. Korzh, P. O. Weigel, D. J. Nemchick, B. J. Drouin, W. Becker, Q.-Y. Zhao, D. Zhu, M. Colangelo, A. E. Dane, K. K. Berggren, M. D. Shaw, S. Mookherjea, “Oscilloscopic capture of greater-than-100 GHz, ultra-low power optical waveforms enabled by integrated electrooptic devices,” Journal of Lightwave Technology 38(1), 166-173 (2020)
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Y. Yang*,†, D. Zhu*,†, W. Yan, A. Agarwal, M. Zheng, J. D. Joannopoulos, P. Lalanne, T. Christensen†, K. K. Berggren, M. Soljačić, “A general theoretical and experimental framework for nanoscale electromagnetism,” Nature 576, 248 (2019) [news coverage]
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Y. Yang, C. Peng, D. Zhu, H. Buljan, J. D. Joannopoulos, B. Zhen, M. Soljačić, “Synthesis and observation of non-Abelian gauge fields in real space,” Science 365 (6457) 1021-1025 (2019) [news coverage]
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D. Zhu, M. Colangelo, B. A. Korzh, Q.-Y. Zhao, S. Frasca, A. E. Dane, A. E. Velasco, A. D. Beyer, J. P. Allmaras, E. Ramirez, W. J. Strickland, D. F. Santavicca, M. D. Shaw, K. K. Berggren, "Superconducting nanowire single-photon detector with integrated impedance-matching taper," Applied Physics Letters, 114, 042601 (2019)
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H. Choi, D. Zhu, Y. Yoon, and D. Englund, “Cascaded cavities boost the indistinguishability of imperfect quantum emitters,” Physical Review Letters 122, 183602 (2019) [news coverage]
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J.S. Glasby, A.K. Sinclair, P.D. Mauskopf, H. Mani, D. Zhu, M. Colangelo, K.K. Berggren, “Properties of a nanowire kinetic inductance detector array,” Journal of Low Temperature Physics (2019)
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S. Frasca, B. Korzh, M. Colangelo, D. Zhu, A.E. Lita, J.P. Allmaras, E.E. Wollman, V.B. Verma, A.E. Dane, E. Ramirez, A.D. Beyer, S.W. Nam, A.G. Kozorezov, M.D. Shaw, K.K. Berggren, “Determining the depairing current in superconducting nanowire single-photon detectors,” Physical Review B 100, 054520 (2019) [Editor’s suggestion]
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A. Sinclair, E. Schroeder, D. Zhu, M. Colangelo, J. Glasby, P. Mauskopf, H. Mani, K. Berggren, Demonstration of microwave multiplexed readout of DC biased superconducting nanowire detectors, IEEE Transactions on Applied Superconductivity 29 (5) 2200704 (2019)
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D. F. Santavicca, B. Noble, C. Kilgore, G. A. Wurtz, M. Colangelo, D. Zhu, K. Berggren, Jitter Characterization of a Dual-Readout SNSPD, IEEE Transaction on Applied Superconductivity 29(5) 2200504 (2019)
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D. Zhu, Q.-Y. Zhao, H. Choi, T.-J. Lu, A. E. Dane, D. Englund, K. K. Berggren, “A scalable multi-photon coincidence detector based on superconducting nanowires,” Nature Nanotechnology 3, 596–601 (2018)
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Q.-Y. Zhao, D. F. Santavicca, D. Zhu, B. Noble, K. K. Berggren, “A distributed electrical model for superconducting nanowire single photon detectors,” Applied Physics Letters 113, 082601 (2018)
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T.-J. Lu, M. Fanto, H. Choi, P. Thomas, J. Steidle, S. Mouradian, W. Kong, D. Zhu, H. Moon, K. Berggren, J. Kim, M. Soltani, S. Preble, D. Englund, “Aluminum nitride integrated photonics platform for the ultraviolet to visible spectrum,” Optics Express 26 (9) 11147-11160 (2018)
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E. Schroeder, P. Mauskopf, H. Mani, S. Bryan, K. K. Berggren, D. Zhu, “Operation of a superconducting nanowire in two detection modes: KID and SPD,” Journal of Low Temperature Physics (2018). https://doi.org/10.1007/s10909-018-2075-0
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Q.-Y. Zhao, D. Zhu, N. Calandri, A. E. Dane, A. N. McCaughan, F. Bellei, H.-Z. Wang, D. F. Santavicca, K. K. Berggren, “Superconducting nanowire single-photon imager,” Nature Photonics 11(4) 247 (2017) [cover page]
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A. E. Dane, A. N. McCaughan, D. Zhu, Q. Zhao, C.-S. Kim, N. Calandri, A. Agarwal, F. Bellei, K. K. Berggren, “Bias sputtered NbN and superconducting nanowire devices,” Applied Physics Letters 111, 122601 (2017)
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N. Calandri, Q.-Y. Zhao, D. Zhu, A. Dane, K. K. Berggren, “Superconducting nanowire detector jitters limited by detector geometry,” Applied Physics Letters 109 (15), 152601 (2016)
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Z. Dong, M. Asbahi, J. Lin, D. Zhu, Y. M. Wang, K. Hippalgaonkar, H.-S. Chu, W. P. Goh, F. Wang, Z. Huang, and J. K. W. Yang, “Second-Harmonic Generation from Sub-5-nm Gaps by Directed Self-Assembly of Nanoparticles onto Template-Stripped Gold Substrates,” Nano Letters 15 (9) 5976-5981 (2015)
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Z. Dong, H.-S. Chu, D. Zhu, W. Du, Y. A. Akimov, W. P. Goh, T. Wang, K. E. J. Goh, C. Troadec, C. A. Nijhuis, J. K.W. Yang, “Electrically-Excited Surface Plasmon Polaritons with Directionality Control,” ACS Photonics 2, 385-391 (2015).
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Z. Dong, M. Bosman, D. Zhu, W. Du, X. M. Goh, C. A. Nijhuis, and J. K. W. Yang, “Fabrication of suspended metal-dielectric-metal plasmonic nanostructures,” Nanotechnology 25(13), 135303 (2014).
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D. Zhu, Z. Dong, H.-S. Chu, Y. A. Akimov, and J. K. W. Yang, “Image Dipole Method for the Beaming of Plasmons from Point Sources,” ACS Photonics 1, 1307-1312 (2014).
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S. J. Tan, L. Zhang, D. Zhu, X. M. Goh, Y. M. Wang, K. Kumar, C.-W. Qiu, and J. K. W. Yang, “Plasmonic Color Palettes for Photorealistic Printing with Aluminum Nanostructures,” Nano Letters 14 (7), 4023-4029 (2014).
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D. Zhu, M. Bosman, and J. K. W. Yang, “A circuit model for plasmonic resonators,” Optics Express 22 (8), 9809 (2014).
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Y. Zhou, D. Zhu, X. Yu, W. Ding, and F. Luan, “Fano resonances in metallic grating coupled whispering gallery mode resonator,” Applied Physics Letters 103(15), 151108 (2013)
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D. Zhu, Y. Zhou, X. Yu, P. Shum, and F. Luan, “Radially graded index whispering gallery mode resonator for penetration enhancement,” Optics Express 20(24), 26285 (2012)
Selected Presentations and Proceedings
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D. Zhu, "Lithium niobate integrated photonics," NQFF Industry Day: Integrated Photonics, Singapore (2024) [Invited]
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D. Zhu, "Integrated quantum photonic devices on thin-film lithium niobate," Quantum Engineering Programme (QEP) 3.0 Launch Day, Singapore (2024) [Invited]
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D. Zhu, "Non-classical light generation and control on thin-film lithium niobate photonic integrated circuits," Asia Light Conference, Singapore (2024) [Invited talk]
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D. Zhu, "Superconducting tapered nanowire detector," The 18th International Superconductive Electronics Conference (ISEC 2023), Nanjing China (2023) [Invited talk]
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D. Zhu, "Scalable single-photon technologies for quantum information processing," Institute of Physics Singapore (IPS) Meeting 2023 [Plenary talk]
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D. Zhu, "Spectral control of nonclassical light on thin-film lithium niobate photonic integrated circuits," The 14th International Conference on Information Optics and Photonics (CIOP), Xi'an China (2023) [Invited talk]
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D. Zhu, “Integrated quantum photonics with LiNbO3,” UCA-Majulab Workshop on Quantum Technologies & Photonics, Nice, France (2023) [Invited talk]
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D. Zhu, "Frequency control of single photons using an integrated electro-optic modulator," International Conference on Materials for Advanced Technologies (ICMAT), Singapore (2023)
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D. Zhu, Y. Hu, B. Desiatov, L. Shao, M. Yu, and M. Lončar, “Single-Sideband Modulation Through Polarization Interband Transition in Thin-Film Lithium Niobate Waveguide,” CLEO: Science & Innovations, SW3A.1, USA (2021)
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D. Zhu, M. Colangelo, C. Chen, B. A. Korzh, F. N.C. Wong, M. D. Shaw, K. K. Berggren, “Photon-number resolution using superconducting tapered nanowire detector,” CLEO: Fundamental Science, FF3D.5, USA (2020) [highlighted talk]
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D. Zhu, H. Choi, T.-J. Lu, M. Colangelo, E. Maggiolini, Q.-Y. Zhao, D. Englund, K. K. Berggren, “Delay-line-multiplexed single-photon detector array for photonic integrated circuits,” 683rd WE-Heraeus-Seminar: Physics and Applications of Superconducting Nanowire Single Photon Detectors, Bad Honnef, Germany (2018)
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D. Zhu, M. Colangelo, D. F. Santavicca, J. C. Bienfang, K. K. Berggren, “Coupled nanoscale kinetic-inductive transmission lines,” Applied Superconductivity Conference (ASC), Seattle, Washington, USA (2018)
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D. Zhu, B. A. Korzh, Q-Y. Zhao, M. Colangelo, S. Frasca, E. Ramirez, A. E. Dane, A. Velasco, A. D. Beyer, D. F. Santavicca, M. D. Shaw, and K. K. Berggren, “Increasing the output signal of superconducting nanowire single-photon detectors with impedance-matching tapers,” Applied Superconductivity Conference (ASC), Seattle, Washington, USA (2018)
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D. Zhu, Q.-Y. Zhao, H. Choi, T.-J. Lu, A. Dane, M. Colangelo, D. Englund, and K. K. Berggren, “Single-photon detector based on superconducting nanowire transmission line,” AP-S/URSI, Boston, USA (2018)
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D. Zhu, Q.-Y. Zhao, H. Choi, T.-J. Lu, D. Englund, K. K. Berggren, “Two-photon detector by using superconducting transmission lines,” CLEO: Applications and Technology, JTh5B. 4, San Jose, USA (2017) [Post-deadline paper]
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D. Zhu, H. Choi, T.-J. Lu, Q.-Y. Zhao, A. Dane, F. Najafi, D. Englund, K. K. Berggren, “Superconducting nanowire single-photon detector on aluminum nitride,” CLEO: QELS_Fundamental Science, FTu4C.1. San Jose, USA (2016)
Patents
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D. Zhu, M. Colangelo, B. A. Korzh, M. D. Shaw, K. K. Berggren, “Impedance Matched Superconducting Nanowire Photodetector for Single- and Multi-Photon Detection.” US20210119102A1 (2021)
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J. K. W. Yang, X. M. Goh, D. Zhu, S. Tan, Y. M. Wang, and Z. Dong, “Process for plasmonic-based high resolution color printing.” US10831097B2 (2020)