Junxing Fan, Zhanqiang Xue, Hong-hong Xing, Dan Lu, Guizhen Xu, J. Gu, Jiaguang Han, Longqing Cong
{"title":"Hybrid bound states in the continuum in terahertz metasurfaces","authors":"Junxing Fan, Zhanqiang Xue, Hong-hong Xing, Dan Lu, Guizhen Xu, J. Gu, Jiaguang Han, Longqing Cong","doi":"10.29026/oes.2023.230006","DOIUrl":"https://doi.org/10.29026/oes.2023.230006","url":null,"abstract":"Bound states in the continuum (BICs) have exhibited extraordinary properties in photonics for enhanced light-matter interactions that enable appealing applications in nonlinear optics, biosensors, and ultrafast optical switches. The most common strategy to apply BICs in a metasurface is by breaking symmetry of resonators in the uniform array that leaks the otherwise uncoupled mode to free space and exhibits an inverse quadratic relationship between quality factor (Q) and asymmetry. Here, we propose a scheme to further reduce scattering losses and improve the robustness of symmetry-protected BICs by decreasing the radiation density with a hybrid BIC lattice.We observe significant increase of radiative Q in the hybrid lattice compared to uniform lattice with a factor larger than 14.6. In the hybrid BIC lattice, modes are transferred to Gamma point inherited from high symmetric X, Y and M points in the Brillouin zone that reveal as multiple Fano resonances in the far field and would find applications in hyperspectral sensing. This work initiates a novel and generalized path toward reducing scattering losses and improving the robustness of BICs in terms of lattice engineering that would release the rigid requirements of fabrication accuracy and benefit applications of photonics and optoelectronic devices.","PeriodicalId":208845,"journal":{"name":"Opto-Electronic Science","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133224405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haijin Huang, A. Balčytis, Aditya Dubey, A. Boes, T. Nguyen, G. Ren, M. Tan, A. Mitchell
{"title":"Spatio-temporal isolator in lithium niobate on insulator","authors":"Haijin Huang, A. Balčytis, Aditya Dubey, A. Boes, T. Nguyen, G. Ren, M. Tan, A. Mitchell","doi":"10.29026/oes.2023.220022","DOIUrl":"https://doi.org/10.29026/oes.2023.220022","url":null,"abstract":"In this contribution, we simulate, design, and experimentally demonstrate an integrated optical isolator based on spatiotemporal modulation in the thin-film lithium niobate on insulator waveguide platform. We used two cascaded travelling wave phase modulators for spatiotemporal modulation and a ring resonator as a wavelength filter to suppress the sidebands of the reverse propagating light. This enabled us to achieve an isolation of 27 dB. The demonstrated suppression of the reverse propagating light makes such isolators suitable for the integration with III-V laser diodes and Erbium doped gain sections in the thin-film lithium niobate on insulator waveguide platform.","PeriodicalId":208845,"journal":{"name":"Opto-Electronic Science","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121570923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Minin, O. Minin, Yinghui Cao, B. Yan, Zengbo Wang, B. Luk’yanchuk
{"title":"Photonic lenses with whispering gallery waves at Janus particles","authors":"I. Minin, O. Minin, Yinghui Cao, B. Yan, Zengbo Wang, B. Luk’yanchuk","doi":"10.29026/oes.2022.210008","DOIUrl":"https://doi.org/10.29026/oes.2022.210008","url":null,"abstract":"We show that electric field on the plane surface of truncated sphere or cylinders (so called Janus particles) have sharp resonances versus the depth of removed segment of a sphere or cylinder. These resonances are related to the excited whispering gallery waves caused by truncation. It is a new mechanism of the field localization. Optimization of this effect for cylinders permits to reach a super resolution in the line thickness what can be used for contacting optical lithography.","PeriodicalId":208845,"journal":{"name":"Opto-Electronic Science","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123784010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fanlu Zhang, Zhicheng Su, Zhe Li, Yi Zhu, Nikita Gagrani, Ziyuan Li, M. Lockrey, Li Li, I. Aharonovich, Yuerui Lu, H. Tan, C. Jagadish, L. Fu
{"title":"High-speed multiwavelength InGaAs/InP quantum well nanowire array micro-LEDs for next generation optical communications","authors":"Fanlu Zhang, Zhicheng Su, Zhe Li, Yi Zhu, Nikita Gagrani, Ziyuan Li, M. Lockrey, Li Li, I. Aharonovich, Yuerui Lu, H. Tan, C. Jagadish, L. Fu","doi":"10.29026/oes.2023.230003","DOIUrl":"https://doi.org/10.29026/oes.2023.230003","url":null,"abstract":"","PeriodicalId":208845,"journal":{"name":"Opto-Electronic Science","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121863472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"High-speed visible light communication based on micro-LED: A technology with wide applications in next generation communication","authors":"Ting-Chang Lu, Xiang Lin, Wenan Guo, Chang-Ching Tu, Shibiao Liu, Chun-Jung Lin, Zhong Chen, H. Kuo, Tingzhu Wu","doi":"10.29026/oes.2022.220020","DOIUrl":"https://doi.org/10.29026/oes.2022.220020","url":null,"abstract":"The evolution of next-generation cellular networks is aimed at creating faster, more reliable solutions. Both the next-generation 6G network and the metaverse require high transmission speeds. Visible light communication (VLC) is deemed an important ancillary technology to wireless communication. It has shown potential for a wide range of applications in next-generation communication. Micro light-emitting diodes (μLEDs) are ideal light sources for high-speed VLC, owing to their high modulation bandwidths. In this review, an overview of μLEDs for VLC is presented. Methods to improve the modulation bandwidth are discussed in terms of epitaxy optimization, crystal orientation, and active region structure. Moreover, electroluminescent white LEDs, photoluminescent white LEDs based on phosphor or quantum-dot color conversion, and μLED-based detectors for VLC are introduced. Finally, the latest high-speed VLC applications and the application prospects of VLC in 6G are introduced, including underwater VLC and artificial intelligence-based VLC systems.","PeriodicalId":208845,"journal":{"name":"Opto-Electronic Science","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134534285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Cao, Meng Lian, Xieyu Chen, Libang Mao, Kuan Liu, Jingyuan Jia, Ying Su, H. Ren, Shoujun Zhang, Yihan Xu, Jiajia Chen, Z. Tian, Dongming Guo
{"title":"Multi-cycle reconfigurable THz extraordinary optical transmission using chalcogenide metamaterials","authors":"T. Cao, Meng Lian, Xieyu Chen, Libang Mao, Kuan Liu, Jingyuan Jia, Ying Su, H. Ren, Shoujun Zhang, Yihan Xu, Jiajia Chen, Z. Tian, Dongming Guo","doi":"10.29026/oes.2022.210010","DOIUrl":"https://doi.org/10.29026/oes.2022.210010","url":null,"abstract":"Metamaterials composed of metallic antennae arrays are used as they possess extraordinary optical transmission (EOT) in the terahertz (THz) region, whereby a giant forward light propagation can be created using constructive interference of tunneling surface plasmonic waves. However, numerous applications of THz meta-devices demand an active manipula-tion of the THz beam in free space. Although some studies have been carried out to control the EOT for the THz region, few of these are based upon electrical modulation of the EOT phenomenon, and novel strategies are required for actively and dynamically reconfigurable EOT meta-devices. In this work, we experimentally present that the EOT resonance can be coupled to optically reconfigurable chalcogenide metamaterials which offers a reversible all-optical control of the THz light. A modulation efficiency of 88% in transmission at 0.85 THz is experimentally observed using the EOT metamaterials, which is composed of a gold (Au) circular aperture array sitting on a non-volatile chalcogenide phase change material (Ge 2 Sb 2 Te 5 ) film. This comes up with a robust and ultrafast reconfigurable EOT over 20 times of switching, excited by a nanosecond pulsed laser. The measured data have a good agreement with finite-element-method numerical simulation. This work promises THz modulators with significant on/off ratios and fast speeds. extraordinary optical transmission using chalcogenide metamaterials. Opto-Electron Sci 1 , 210010 (2022).","PeriodicalId":208845,"journal":{"name":"Opto-Electronic Science","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134627926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rao Fu, K. Chen, Zile Li, Shaohua Yu, Guoxing Zheng
{"title":"Metasurface-based nanoprinting: principle, design and advances","authors":"Rao Fu, K. Chen, Zile Li, Shaohua Yu, Guoxing Zheng","doi":"10.29026/oes.2022.220011","DOIUrl":"https://doi.org/10.29026/oes.2022.220011","url":null,"abstract":"Metasurface-based nanoprinting (meta-nanoprinting) has fully demonstrated its advantages in ultrahigh-density gray-scale/color image recording and display. A typical meta-nanoprinting device usually has image resolutions reaching 80 k dots per inch (dpi), far exceeding conventional technology such as gravure printing (typ. 5 k dpi). Besides, by fully exploiting the design degrees of freedom of nanostructured metasurfaces, meta-nanoprinting has been developed from previous single-channel to multiple-channels, to current multifunctional integration or even dynamic display. In this review, we overview the development of meta-nanoprinting, including the physics of nanoprinting to manipulate optical amplitude and spectrum, single-functional meta-nanoprinting, multichannel meta-nanoprinting, dynamic meta-nanoprinting and multifunctional metasurface integrating nanoprinting with holography or metalens, etc. Applications of meta-nanoprinting such as image display, vortex beam generation, information decoding and hiding, information encryption, high-density optical storage and optical anti-counterfeiting have also been discussed. Finally, we conclude the opportunities and challenges/perspectives in this rapidly developing research field of meta-nanoprinting.","PeriodicalId":208845,"journal":{"name":"Opto-Electronic Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129867715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}