[{"citation":{"apa":"Jin, X., &#38; Zentgraf, T. (2026). Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection. <i>Advanced Photonics</i>, <i>8</i>(02), Article 26010. <a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">https://doi.org/10.1117/1.ap.8.2.026010</a>","ieee":"X. Jin and T. Zentgraf, “Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection,” <i>Advanced Photonics</i>, vol. 8, no. 02, Art. no. 26010, 2026, doi: <a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">10.1117/1.ap.8.2.026010</a>.","short":"X. Jin, T. Zentgraf, Advanced Photonics 8 (2026).","chicago":"Jin, Xiao, and Thomas Zentgraf. “Increasing the Design Degree of Freedom for Polarization through Multilayer Synchronous Polarization Projection.” <i>Advanced Photonics</i> 8, no. 02 (2026). <a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">https://doi.org/10.1117/1.ap.8.2.026010</a>.","mla":"Jin, Xiao, and Thomas Zentgraf. “Increasing the Design Degree of Freedom for Polarization through Multilayer Synchronous Polarization Projection.” <i>Advanced Photonics</i>, vol. 8, no. 02, 26010, SPIE-Intl Soc Optical Eng, 2026, doi:<a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">10.1117/1.ap.8.2.026010</a>.","ama":"Jin X, Zentgraf T. Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection. <i>Advanced Photonics</i>. 2026;8(02). doi:<a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">10.1117/1.ap.8.2.026010</a>","bibtex":"@article{Jin_Zentgraf_2026, title={Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection}, volume={8}, DOI={<a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">10.1117/1.ap.8.2.026010</a>}, number={0226010}, journal={Advanced Photonics}, publisher={SPIE-Intl Soc Optical Eng}, author={Jin, Xiao and Zentgraf, Thomas}, year={2026} }"},"quality_controlled":"1","oa":"1","status":"public","_id":"64978","publisher":"SPIE-Intl Soc Optical Eng","user_id":"30525","volume":8,"issue":"02","publication":"Advanced Photonics","abstract":[{"lang":"eng","text":"The degrees of freedom (DoFs) of light determine the maximum number of independent signal\r\nchannels an optical system can support. However, the polarization DoF is intrinsically limited to two by\r\northogonality, which causes unavoidable crosstalk and often forces position multiplexing, where different\r\nchannels are assigned to distinct spatial locations to suppress crosstalk. This research introduces a multilayer\r\nsynchronous polarization projection method that fundamentally increases the DoF for polarization\r\nmultiplexing. The DoF equals twice the number of projection layers. We experimentally demonstrate six-\r\nchannel polarization multiplexing holography without position multiplexing. The six-channel multiplexing\r\nresults indicate that our approach exceeds the conventional polarization multiplexing method, yielding an\r\naverage 3.79 dB improvement in extinction ratio across the six channels. Compared with the theoretical\r\nlimit of traditional polarization multiplexing, our method reduces crosstalk by an average of 6.52 dB across\r\nall channels in a seven-channel design. The polarization projection method breaks the DoF limitation\r\nof polarization multiplexing, opening a path toward high-dimensional photonic information encoding for\r\ncommunication, encryption, and imaging."}],"date_created":"2026-03-16T07:17:52Z","type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"title":"Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection","year":"2026","publication_identifier":{"issn":["2577-5421"]},"author":[{"first_name":"Xiao","last_name":"Jin","full_name":"Jin, Xiao"},{"full_name":"Zentgraf, Thomas","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","first_name":"Thomas","id":"30525"}],"date_updated":"2026-03-16T07:20:07Z","publication_status":"published","intvolume":"         8","article_type":"original","main_file_link":[{"url":"https://www.researching.cn/Articles/OJafd1e3b9e643c6be","open_access":"1"}],"article_number":"26010","language":[{"iso":"eng"}],"doi":"10.1117/1.ap.8.2.026010"},{"type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"date_created":"2026-08-31T05:44:11Z","abstract":[{"text":"Janus metasurfaces have attracted considerable attention in encrypted communication, imaging, and display due to their unusual bidirectional asymmetric optical manipulation characteristics. Particularly, their multifunctionalization is of great significance for enhancing the compactness and integration of optical systems. However, the realization of multifunctional Janus metasurfaces in the optical band still faces enormous difficulties and challenges, which are essentially limited by the anti-error design and processing methods of multi-layer cascade metasurfaces. Here, a triple-layer Janus metasurface based on cascaded plasmonic nano-antenna arrays fully buried in SiO2 is constructed. Among them, the cascaded plasma nano-antenna consists of two types of enantiomers for each wavelength. Each enantiomer is fabricated with two layers of L-shaped nanostructures with phase modulation and one layer of dimer nanostructures with polarization selection stacked alternately along the optical axis. We experimentally show that the Janus metasurface achieves bidirectional asymmetric multi-channel holographic encryption, simultaneously using propagation direction, phase, polarization, and wavelength for the first time in the near-infrared band, which is expected to provide a frontier route for multifunctional optical displays, high-level optical information encryption, and large-capacity full-duplex communication.","lang":"eng"}],"issue":"05","publication":"Advanced Photonics","doi":"10.1117/1.ap.8.5.056006","main_file_link":[{"url":"https://www.researching.cn/Articles/OJf9b235a7c5a0a3bf","open_access":"1"}],"language":[{"iso":"eng"}],"date_updated":"2026-08-31T05:48:43Z","publication_status":"published","intvolume":"         8","article_type":"original","title":"Asymmetric multi-channel holography by cascaded plasmonic Janus metasurfaces","year":"2026","author":[{"first_name":"Guocui","last_name":"Wang","full_name":"Wang, Guocui"},{"first_name":"René","last_name":"Geromel","full_name":"Geromel, René"},{"full_name":"Wei, Qunshuo","last_name":"Wei","first_name":"Qunshuo"},{"first_name":"Ruizhe","last_name":"Zhao","full_name":"Zhao, Ruizhe"},{"full_name":"Li, Xiaowei","last_name":"Li","first_name":"Xiaowei"},{"id":"30525","orcid":"0000-0002-8662-1101","first_name":"Thomas","last_name":"Zentgraf","full_name":"Zentgraf, Thomas"},{"last_name":"Huang","first_name":"Lingling","full_name":"Huang, Lingling"}],"publication_identifier":{"issn":["2577-5421","2577-5421"]},"oa":"1","quality_controlled":"1","citation":{"apa":"Wang, G., Geromel, R., Wei, Q., Zhao, R., Li, X., Zentgraf, T., &#38; Huang, L. (2026). Asymmetric multi-channel holography by cascaded plasmonic Janus metasurfaces. <i>Advanced Photonics</i>, <i>8</i>(05), 1–11. <a href=\"https://doi.org/10.1117/1.ap.8.5.056006\">https://doi.org/10.1117/1.ap.8.5.056006</a>","ieee":"G. Wang <i>et al.</i>, “Asymmetric multi-channel holography by cascaded plasmonic Janus metasurfaces,” <i>Advanced Photonics</i>, vol. 8, no. 05, pp. 1–11, 2026, doi: <a href=\"https://doi.org/10.1117/1.ap.8.5.056006\">10.1117/1.ap.8.5.056006</a>.","short":"G. Wang, R. Geromel, Q. Wei, R. Zhao, X. Li, T. Zentgraf, L. Huang, Advanced Photonics 8 (2026) 1–11.","chicago":"Wang, Guocui, René Geromel, Qunshuo Wei, Ruizhe Zhao, Xiaowei Li, Thomas Zentgraf, and Lingling Huang. “Asymmetric Multi-Channel Holography by Cascaded Plasmonic Janus Metasurfaces.” <i>Advanced Photonics</i> 8, no. 05 (2026): 1–11. <a href=\"https://doi.org/10.1117/1.ap.8.5.056006\">https://doi.org/10.1117/1.ap.8.5.056006</a>.","mla":"Wang, Guocui, et al. “Asymmetric Multi-Channel Holography by Cascaded Plasmonic Janus Metasurfaces.” <i>Advanced Photonics</i>, vol. 8, no. 05, SPIE-Intl Soc Optical Eng, 2026, pp. 1–11, doi:<a href=\"https://doi.org/10.1117/1.ap.8.5.056006\">10.1117/1.ap.8.5.056006</a>.","ama":"Wang G, Geromel R, Wei Q, et al. Asymmetric multi-channel holography by cascaded plasmonic Janus metasurfaces. <i>Advanced Photonics</i>. 2026;8(05):1-11. doi:<a href=\"https://doi.org/10.1117/1.ap.8.5.056006\">10.1117/1.ap.8.5.056006</a>","bibtex":"@article{Wang_Geromel_Wei_Zhao_Li_Zentgraf_Huang_2026, title={Asymmetric multi-channel holography by cascaded plasmonic Janus metasurfaces}, volume={8}, DOI={<a href=\"https://doi.org/10.1117/1.ap.8.5.056006\">10.1117/1.ap.8.5.056006</a>}, number={05}, journal={Advanced Photonics}, publisher={SPIE-Intl Soc Optical Eng}, author={Wang, Guocui and Geromel, René and Wei, Qunshuo and Zhao, Ruizhe and Li, Xiaowei and Zentgraf, Thomas and Huang, Lingling}, year={2026}, pages={1–11} }"},"user_id":"30525","volume":8,"page":"1-11","publisher":"SPIE-Intl Soc Optical Eng","_id":"66870","status":"public"},{"date_updated":"2022-01-06T07:04:02Z","publication_status":"published","intvolume":"         1","article_type":"review","year":"2019","title":"Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review","author":[{"full_name":"Sain, Basudeb","last_name":"Sain","first_name":"Basudeb"},{"id":"20798","last_name":"Meier","first_name":"Cedrik","orcid":"https://orcid.org/0000-0002-3787-3572","full_name":"Meier, Cedrik"},{"full_name":"Zentgraf, Thomas","first_name":"Thomas","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","id":"30525"}],"publication_identifier":{"issn":["2577-5421"]},"doi":"10.1117/1.ap.1.2.024002","main_file_link":[{"open_access":"1","url":"https://www.spiedigitallibrary.org/journals/Advanced-Photonics/volume-1/issue-02/024002/Nonlinear-optics-in-all-dielectric-nanoantennas-and-metasurfaces--a/10.1117/1.AP.1.2.024002.full"}],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Free from phase-matching constraints, plasmonic metasurfaces have contributed significantly to the control of optical nonlinearity and enhancement of nonlinear generation efficiency by engineering subwavelength meta-atoms. However, high dissipative losses and inevitable thermal heating limit their applicability in nonlinear nanophotonics. All-dielectric metasurfaces, supporting both electric and magnetic Mie-type resonances in their nanostructures, have appeared as a promising alternative to nonlinear plasmonics. High-index dielectric nanostructures, allowing additional magnetic resonances, can induce magnetic nonlinear effects, which, along with electric nonlinearities, increase the nonlinear conversion efficiency. In addition, low dissipative losses and high damage thresholds provide an extra degree of freedom for operating at high pump intensities, resulting in a considerable enhancement of the nonlinear processes. We discuss the current state of the art in the intensely developing area of all-dielectric nonlinear nanostructures and metasurfaces, including the role of Mie modes, Fano resonances, and anapole moments for harmonic generation, wave mixing, and ultrafast optical switching. Furthermore, we review the recent progress in the nonlinear phase and wavefront control using all-dielectric metasurfaces. We discuss techniques to realize all-dielectric metasurfaces for multifunctional applications and generation of second-order nonlinear processes from complementary metal–oxide–semiconductor-compatible materials."}],"publication":"Advanced Photonics","issue":"2","type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"429"},{"_id":"289"}],"file":[{"date_created":"2019-12-14T14:24:36Z","creator":"zentgraf","success":1,"content_type":"application/pdf","file_id":"15330","access_level":"closed","file_size":5275552,"file_name":"AdvPhoton_2019.pdf","date_updated":"2019-12-14T14:24:36Z","relation":"main_file"}],"date_created":"2019-04-04T06:20:14Z","has_accepted_license":"1","status":"public","ddc":["530"],"user_id":"30525","volume":1,"page":"024002","_id":"8797","quality_controlled":"1","project":[{"name":"TRR 142","_id":"53"},{"_id":"75","name":"TRR 142 - Subproject C5"},{"name":"TRR 142 - Project Area C","_id":"56"}],"file_date_updated":"2019-12-14T14:24:36Z","citation":{"mla":"Sain, Basudeb, et al. “Nonlinear Optics in All-Dielectric Nanoantennas and Metasurfaces: A Review.” <i>Advanced Photonics</i>, vol. 1, no. 2, 2019, p. 024002, doi:<a href=\"https://doi.org/10.1117/1.ap.1.2.024002\">10.1117/1.ap.1.2.024002</a>.","bibtex":"@article{Sain_Meier_Zentgraf_2019, title={Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review}, volume={1}, DOI={<a href=\"https://doi.org/10.1117/1.ap.1.2.024002\">10.1117/1.ap.1.2.024002</a>}, number={2}, journal={Advanced Photonics}, author={Sain, Basudeb and Meier, Cedrik and Zentgraf, Thomas}, year={2019}, pages={024002} }","ama":"Sain B, Meier C, Zentgraf T. Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review. <i>Advanced Photonics</i>. 2019;1(2):024002. doi:<a href=\"https://doi.org/10.1117/1.ap.1.2.024002\">10.1117/1.ap.1.2.024002</a>","ieee":"B. Sain, C. Meier, and T. Zentgraf, “Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review,” <i>Advanced Photonics</i>, vol. 1, no. 2, p. 024002, 2019.","apa":"Sain, B., Meier, C., &#38; Zentgraf, T. (2019). Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review. <i>Advanced Photonics</i>, <i>1</i>(2), 024002. <a href=\"https://doi.org/10.1117/1.ap.1.2.024002\">https://doi.org/10.1117/1.ap.1.2.024002</a>","chicago":"Sain, Basudeb, Cedrik Meier, and Thomas Zentgraf. “Nonlinear Optics in All-Dielectric Nanoantennas and Metasurfaces: A Review.” <i>Advanced Photonics</i> 1, no. 2 (2019): 024002. <a href=\"https://doi.org/10.1117/1.ap.1.2.024002\">https://doi.org/10.1117/1.ap.1.2.024002</a>.","short":"B. Sain, C. Meier, T. Zentgraf, Advanced Photonics 1 (2019) 024002."},"oa":"1"}]