Shufang Dong, Kai Qu, Q. Hu, Shaojie Wang, Ke Chen, Yijun Feng
{"title":"Full‐Space Janus Meta‐Lens for Shared‐Aperture Transmission‐Reflection‐Independent Focusing of Electromagnetic Wave","authors":"Shufang Dong, Kai Qu, Q. Hu, Shaojie Wang, Ke Chen, Yijun Feng","doi":"10.1002/adpr.202300349","DOIUrl":"https://doi.org/10.1002/adpr.202300349","url":null,"abstract":"Janus metasurfaces emerge as a promising platform for implementing multiple wave functionalities by fully exploiting the inherent propagation direction of electromagnetic waves. Their out‐of‐plane asymmetric structures enable different wave functions depending on the propagation direction. Herein, a multiplexed Janus metasurface is proposed, which operates in the microwave region to flexibly manipulate the transmission and reflection wavefronts for same linearly polarized (LP) incidence propagating along the two opposite directions. A meta‐lens is constructed to validate the concept of full‐space shared‐aperture transmission‐reflection‐independent focusing of electromagnetic (EM) waves, exhibiting four distinct focusing performances. Experiments are conducted in the microwave region that agree well with the simulation results. The proposed full‐space Janus metasurface may provide a platform for asymmetric imaging, multichannel information processing, and encrypted communication.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":" 6","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139786788","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}
Alexis Voisine, F. Billard, O. Faucher, P. Béjot, É. Hertz
{"title":"Holographic Storage of Ultrafast Photonic Qubit in Molecules","authors":"Alexis Voisine, F. Billard, O. Faucher, P. Béjot, É. Hertz","doi":"10.1002/adpr.202400008","DOIUrl":"https://doi.org/10.1002/adpr.202400008","url":null,"abstract":"Herein, it is demonstrated that ultrashort spatially structured beams can sculpt a sample of gas‐phase molecules like a 4D material to produce a spatial pattern of aligned molecules whose shape and temporal evolution allow to restore the spatial light information on a time‐delayed reading pulse. To do so, the spatial phase and amplitude information of ultrashort light beams are encoded into rotational coherences of molecules by exploiting the interplay between spin angular momentum and orbital angular momentum. The field‐free molecular alignment resulting from the interaction leads to an inhomogeneous spatial structuring of the sample allowing to transfer the encoded information into a time‐delayed probe beam. The demonstration is conducted in molecules. Besides applications in terms of THz bandwidth buffer memory, the strategy features interesting prospects for establishing versatile optical processing of orbital angular momentum (OAM) fields, for studying various molecular processes, or for designing new photonic devices enabling to impart superpositions of OAM modes to light beams.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"9 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139849631","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}
Alexis Voisine, Franck Billard, Olivier Faucher, Pierre Béjot, Edouard Hertz
{"title":"Holographic Storage of Ultrafast Photonic Qubit in Molecules","authors":"Alexis Voisine, Franck Billard, Olivier Faucher, Pierre Béjot, Edouard Hertz","doi":"10.1002/adpr.202400008","DOIUrl":"10.1002/adpr.202400008","url":null,"abstract":"<p>Herein, it is demonstrated that ultrashort spatially structured beams can sculpt a sample of gas-phase molecules like a 4D material to produce a spatial pattern of aligned molecules whose shape and temporal evolution allow to restore the spatial light information on a time-delayed reading pulse. To do so, the spatial phase and amplitude information of ultrashort light beams are encoded into rotational coherences of molecules by exploiting the interplay between spin angular momentum and orbital angular momentum. The field-free molecular alignment resulting from the interaction leads to an inhomogeneous spatial structuring of the sample allowing to transfer the encoded information into a time-delayed probe beam. The demonstration is conducted in <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mrow>\u0000 <mtext>CO</mtext>\u0000 </mrow>\u0000 <mn>2</mn>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>$left(text{CO}right)_{2}$</annotation>\u0000 </semantics></math> molecules. Besides applications in terms of THz bandwidth buffer memory, the strategy features interesting prospects for establishing versatile optical processing of orbital angular momentum (OAM) fields, for studying various molecular processes, or for designing new photonic devices enabling to impart superpositions of OAM modes to light beams.</p>","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202400008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139789909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Direct Determination of Photonic Stopband Topological Character: A Framework Based on Dispersion Measurements","authors":"Nitish Kumar Gupta, Sapireddy Srinivasu, Mukesh Kumar, Anjani Kumar Tiwari, Sudipta Sarkar Pal, Harshawardhan Wanare, S. Anantha Ramakrishna","doi":"10.1002/adpr.202300155","DOIUrl":"https://doi.org/10.1002/adpr.202300155","url":null,"abstract":"<p>Ascertainment of photonic stopband absolute topological character requires information regarding the Bloch eigenfunction spatial distribution. Consequently, the experimental investigations predominantly restrict themselves to the bulk-boundary correspondence principle and the ensuing emergence of topological surface state. Although capable of establishing the equivalence/inequivalence of bandgaps, the determination of their absolute topological identity remains out of its purview. The alternate method of reflection phase-based identification also provides only contentious improvements owing to the measurement complexities pertaining to the interferometric setups. To circumvent these limitations, the Kramers–Kronig amplitude-phase causality considerations are resorted to and an experimentally conducive method is proposed for bandgap topological character determination directly from the parametric reflectance measurements. Particularly, it is demonstrated that in case of 1D photonic crystals, polarization-resolved dispersion measurements suffice in qualitatively determining bandgaps’ absolute topological identities. By invoking the translational invariance of the investigated samples, a parameter “differential effective mass” is also defined, that encapsulates bandgaps’ topological identities and engenders an experimentally discernible bandgap classifier.</p>","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 4","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202300155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140537522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Christian Frydendahl, S. Indukuri, Taget Raghavendran Devidas, Zhengli Han, N. Mazurski, Kenji Watanabe, Takashi Taniguchi, Hadar Steinberg, Uriel Levy
{"title":"hBN‐Encapsulated Graphene Coupled to a Plasmonic Metasurface via 1D Electrodes for Photodetection Applications","authors":"Christian Frydendahl, S. Indukuri, Taget Raghavendran Devidas, Zhengli Han, N. Mazurski, Kenji Watanabe, Takashi Taniguchi, Hadar Steinberg, Uriel Levy","doi":"10.1002/adpr.202300192","DOIUrl":"https://doi.org/10.1002/adpr.202300192","url":null,"abstract":"It is shown here how encapsulated graphene devices can be laterally coupled to plasmonic metasurfaces via 1D edge contacts, preserving the high mobility of encapsulated graphene while enhancing optical coupling. The device is used for photodetection applications where high responsivities in the range of 100 A W−1 for most of the visible spectrum are reported. The device exhibits a photogating effect which is attributed to defect states in the encapsulating hBN layers. The results highlight a new configuration to couple graphene with plasmonic structures and points to a new type of device based on defect states and graphene's excellent transport properties to achieve photodetectors with ultrahigh responsivities.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"16 12","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139811010","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}
Christian Frydendahl, Sita Rama Krishna Chaitanya Indukuri, Taget Raghavendran Devidas, Zhengli Han, Noa Mazurski, Kenji Watanabe, Takashi Taniguchi, Hadar Steinberg, Uriel Levy
{"title":"hBN-Encapsulated Graphene Coupled to a Plasmonic Metasurface via 1D Electrodes for Photodetection Applications","authors":"Christian Frydendahl, Sita Rama Krishna Chaitanya Indukuri, Taget Raghavendran Devidas, Zhengli Han, Noa Mazurski, Kenji Watanabe, Takashi Taniguchi, Hadar Steinberg, Uriel Levy","doi":"10.1002/adpr.202300192","DOIUrl":"10.1002/adpr.202300192","url":null,"abstract":"<p>It is shown here how encapsulated graphene devices can be laterally coupled to plasmonic metasurfaces via 1D edge contacts, preserving the high mobility of encapsulated graphene while enhancing optical coupling. The device is used for photodetection applications where high responsivities in the range of 100 A W<sup>−1</sup> for most of the visible spectrum are reported. The device exhibits a photogating effect which is attributed to defect states in the encapsulating hBN layers. The results highlight a new configuration to couple graphene with plasmonic structures and points to a new type of device based on defect states and graphene's excellent transport properties to achieve photodetectors with ultrahigh responsivities.</p>","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 4","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202300192","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139871066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhangqi Dang, Zeyu Deng, Tao Chen, Zhenming Ding, Ziyang Zhang
{"title":"A Simple Nonlinear Classifier Using a Multimode Optical Chip","authors":"Zhangqi Dang, Zeyu Deng, Tao Chen, Zhenming Ding, Ziyang Zhang","doi":"10.1002/adpr.202470004","DOIUrl":"https://doi.org/10.1002/adpr.202470004","url":null,"abstract":"<p>The photonic neural network is emerging as a promising technology for fast and power-efficient computing. So far, optics mainly perform linear transformations, and it remains challenging to integrate nonlinear activation function. The cover image shows an optical neural chip with only one multimode waveguide and a few electrodes. Though extremely simple, this chip constructs a modular network with both linear and nonlinear transformations. This work (see article number 2300253 by Ziyang Zhang and co-workers) offers an alternative route to exploiting the modulated multimode interference for photonic computing applications.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 2","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202470004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139676654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On-Chip Arrayed Waveguide Grating Fabricated on Thin-Film Lithium Niobate","authors":"Zhe Wang, Zhiwei Fang, Zhaoxiang Liu, Youting Liang, Jian Liu, Jianping Yu, Ting Huang, Yuan Zhou, Haisu Zhang, Min Wang, Ya Cheng","doi":"10.1002/adpr.202470005","DOIUrl":"https://doi.org/10.1002/adpr.202470005","url":null,"abstract":"<p>Zhiwei Fang, Min Wang, Ya Cheng and co-workers have fabricated an on-chip 8-channel thin-film lithium-niobate arrayed waveguide grating (AWG) by using photolithography-assisted chemo-mechanical etching technique (see article number 2300228). On-chip loss as low as 3.32 dB, a single-channel bandwidth of 1.6 nm, and a total-channel bandwidth of 12.8 nm are obtained. The cross talk between adjacent channels is measured to be below –3.83 dB and the cross talk between nonadjacent channels is below –15 dB.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 2","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202470005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139676655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Inna Y. Khairani, Maximilian Spellauge, Farbod Riahi, Heinz P. Huber, Bilal Gökce, C. Doñate‐Buendía
{"title":"Parallel Diffractive Multi‐Beam Pulsed‐Laser Ablation in Liquids Toward Cost‐Effective Gram Per Hour Nanoparticle Productivity","authors":"Inna Y. Khairani, Maximilian Spellauge, Farbod Riahi, Heinz P. Huber, Bilal Gökce, C. Doñate‐Buendía","doi":"10.1002/adpr.202300290","DOIUrl":"https://doi.org/10.1002/adpr.202300290","url":null,"abstract":"\u0000Nanoparticles (NPs) generated by pulsed‐laser ablation in liquids (PLAL) have benefited many key applications due to their versatility, enlarged surface area, and high purity. However, scaling up NPs production represents one of the main requisites to commercialize this technology. The established upscaling strategy demands high power and repetition rate laser source with fast scanning systems, which are not widely available and costly. Herein, a cost‐effective alternative is proposed, the addition of static diffractive optical elements to achieve parallel processing through the multi‐beam PLAL (MB‐PLAL). In MB‐PLAL, the optimum repetition rate is reduced to compensate laser energy splitting, hence achieving a higher interpulse distance, reducing pulse shielding, and increasing NPs productivity. MB‐PLAL with 11 beams reached a factor 4 productivity increase for iron–nickel alloy (Fe50Ni50) NPs compared to the single‐beam setup (0.4–1.6 g h−1), and a factor 3 increase for gold (Au) NPs (0.32–0.94 g h−1). The scalability of the proposed MB‐PLAL technique setup is confirmed by Au and Fe50Ni50 NPs productivity experiments using 1, 6, and 11 beams, showing a linear increase in productivity.","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"13 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139811337","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}
Inna Y. Khairani, Maximilian Spellauge, Farbod Riahi, Heinz P. Huber, Bilal Gökce, Carlos Doñate-Buendía
{"title":"Parallel Diffractive Multi-Beam Pulsed-Laser Ablation in Liquids Toward Cost-Effective Gram Per Hour Nanoparticle Productivity","authors":"Inna Y. Khairani, Maximilian Spellauge, Farbod Riahi, Heinz P. Huber, Bilal Gökce, Carlos Doñate-Buendía","doi":"10.1002/adpr.202300290","DOIUrl":"10.1002/adpr.202300290","url":null,"abstract":"<p>\u0000Nanoparticles (NPs) generated by pulsed-laser ablation in liquids (PLAL) have benefited many key applications due to their versatility, enlarged surface area, and high purity. However, scaling up NPs production represents one of the main requisites to commercialize this technology. The established upscaling strategy demands high power and repetition rate laser source with fast scanning systems, which are not widely available and costly. Herein, a cost-effective alternative is proposed, the addition of static diffractive optical elements to achieve parallel processing through the multi-beam PLAL (MB-PLAL). In MB-PLAL, the optimum repetition rate is reduced to compensate laser energy splitting, hence achieving a higher interpulse distance, reducing pulse shielding, and increasing NPs productivity. MB-PLAL with 11 beams reached a factor 4 productivity increase for iron–nickel alloy (Fe<sub>50</sub>Ni<sub>50</sub>) NPs compared to the single-beam setup (0.4–1.6 g h<sup>−1</sup>), and a factor 3 increase for gold (Au) NPs (0.32–0.94 g h<sup>−1</sup>). The scalability of the proposed MB-PLAL technique setup is confirmed by Au and Fe<sub>50</sub>Ni<sub>50</sub> NPs productivity experiments using 1, 6, and 11 beams, showing a linear increase in productivity.</p>","PeriodicalId":7263,"journal":{"name":"Advanced Photonics Research","volume":"5 5","pages":""},"PeriodicalIF":3.7,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adpr.202300290","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139871011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}