ACS Photonics最新文献

{"title":"Single-Base Resolution Photonic-Integrated Chips via Hybrid Dielectric–Metal Nanocavities for Ultrasensitive Multichannel Biosensing","authors":"Bowen Du, Yule Zhang, Fuquan Xie, Zhi Chen, Songrui Wei, Yanqi Ge, Xilin Tian, Qiao Jiang, Qiuliang Wang, Xueji Zhang, Defa Li, Zhongjian Xie, Han Zhang","doi":"10.1021/acsphotonics.4c01437","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01437","url":null,"abstract":"The development of highly precise and rapid biological photonic-integrated chips with single-base resolution for target gene detection holds immense potential to revolutionize genetic diagnostics and nonlinear optical devices. Our recent study presents the design of a single-base resolution photonic-integrated chip (SRPIC) with multichannel biosensing capabilities, enabling discrimination between gene segment sequences differing by a single nucleotide at sample concentrations below 1 fM. Through the utilization of hybrid dielectric–metal nanocavity arrays, the SRPIC established an efficient biosensing platform by motivating light-biological matter coupling behavior. This accomplishment represents an extraordinary 10⁴-fold increase in the limit of detection (LOD) compared with the CRISPR-HOLMES technique, exhibiting nearly impeccable precision during clinical testing. Our research highlights the potential of SRPIC as a powerful tool for the development of high-performance photonic-integrated chips capable of achieving multichannel single-base resolution biosensing, with each channel representing the detection of a single virus.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"44 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142588976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Epitaxial Engineering of FAPbBr3/FAPbBr3–xClx Heterojunctions for Sensitive X-ray and α-Particle Detection","authors":"Tongyang Wang,&nbsp;Xin Zhang,&nbsp;Quanchao Zhang,&nbsp;Xin Liu,&nbsp;Haowen Luo,&nbsp;Yingying Hao,&nbsp;Ruichen Bai,&nbsp;Lingyan Xu*,&nbsp;Jianxi Liu and Yadong Xu*,&nbsp;","doi":"10.1021/acsphotonics.4c0121410.1021/acsphotonics.4c01214","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01214https://doi.org/10.1021/acsphotonics.4c01214","url":null,"abstract":"<p >Halide perovskite crystals have attracted extensive research in the field of radiation detection, thanks to their superior carrier transport abilities and facile solution preparation methods. However, dark current instability is common in perovskite single-crystal devices, especially under high bias voltages. Herein, we achieve the modulation of surface defects by epitaxial growth to obtain heterogeneous crystals with high crystalline quality, developing FAPbBr₃/FAPbBr_3–<i>x</i>Cl_<i>x</i> heterojunctions to address severely increased dark current. The FAPbBr₃/FAPbBr_2.7Cl_0.3 heterojunction exhibits reduced trap-state density and a significant built-in potential difference. Based on the effective utilization of the dark current cutoff effect of the heterojunctions, a dark current of 0.83 μA·cm^–2 is realized for the FAPbBr₃/FAPbBr_2.7Cl_0.3 detector, which is 7.5% of that based on an intrinsic FAPbBr₃ single crystal. Thus, an optimal sensitivity of 33612 μC·Gy_air^–1·cm^–2 for Au/FAPbBr₃/FAPbBr_2.7Cl_0.3/Au detector was achieved, at a bias of −250 V. Simultaneously, an energy resolution of 15.2% for ²⁴¹Am @ 5.49 MeV α-particle-induced pulse height spectra was recognized. Our work not only establishes a new benchmark for FAPbBr₃-based perovskite performance but also presents a pragmatic strategy to lower the harmful dark current in three-dimensional halide perovskite single crystals.</p>","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4707–4715 4707–4715"},"PeriodicalIF":6.5,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanocavities for Molecular Optomechanics: Their Fundamental Description and Applications","authors":"Philippe Roelli, Huatian Hu, Ewold Verhagen, Stephanie Reich, Christophe Galland","doi":"10.1021/acsphotonics.4c01548","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01548","url":null,"abstract":"Vibrational Raman scattering─a process where light exchanges energy with a molecular vibration through inelastic scattering─is most fundamentally described in a quantum framework where both light and vibration are quantized. When the Raman scatterer is embedded inside a plasmonic nanocavity, as in some sufficiently controlled implementations of surface-enhanced Raman scattering (SERS), the coupled system realizes an optomechanical cavity where coherent and parametrically amplified light–vibration interaction becomes a resource for vibrational state engineering and nanoscale nonlinear optics. The purpose of this Perspective is to clarify the connection between the languages and parameters used in the fields of molecular cavity optomechanics (McOM) versus its conventional, “macroscopic” counterpart and to summarize the main results achieved so far in McOM and the most pressing experimental and theoretical challenges. We aim to make the theoretical framework of molecular cavity optomechanics practically usable for the SERS and nanoplasmonics community at large. While quality factors (<i>Q</i>) and mode volumes (<i>V</i>) essentially describe the performance of a nanocavity in enhancing light-matter interaction, we point to the light-cavity coupling efficiencies (η) and optomechanical cooperativities (<i></i><span style=\"color: inherit;\"><span><span>C</span></span></span><span style=\"\" tabindex=\"0\"><nobr><span overflow=\"scroll\"><span style=\"display: inline-block; position: relative; width: 0em; height: 0px; font-size: 110%;\"><span style=\"position: absolute;\"><span><span style=\"font-family: STIXMathJax_Script-italic;\">𝒞</span></span></span></span></span></nobr></span><script type=\"math/mml\"><math display=\"inline\" overflow=\"scroll\"><mi mathvariant=\"script\">C</mi></math></script>) as the key parameters for molecular optomechanics. As an illustration of the significance of these quantities, we investigate the feasibility of observing optomechanically induced transparency with a molecular vibration─a measurement that would allow for a direct estimate of the optomechanical cooperativity.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"33 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tensile-Strained GeSn Microbridge Lasers with Lithographically Controllable Emission Wavelengths","authors":"Melvina Chen, Hyo-Jun Joo, Youngmin Kim, Eng Huat Toh, Elgin Quek, Zoran Ikonic, Wei Du, Shui-Qing Yu, Donguk Nam","doi":"10.1021/acsphotonics.4c01173","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01173","url":null,"abstract":"GeSn alloys are considered a promising solution to long-sought on-chip industry-compatible light sources. Relentless efforts to improve the performance of GeSn lasers include utilizing tensile strain engineering. However, inducing tensile strain in GeSn has been challenging due to residual compressive strain in the GeSn layer, necessitating complex fabrication processes such as multiple deposition of external stressors. Here, we demonstrate tensile-strained GeSn microbridge lasers by harnessing a geometric strain-inversion technique enabled by a single lithography step. Multiple lasers producing different emission wavelengths were fabricated on a single chip by lithographically controlling the tensile strain. Upon the application of tensile strain, the emission wavelength was tuned by more than 45 nm, while the laser threshold was reduced by almost 70%. This work presents a simple, cost-effective way to build a large array of on-chip lasers emitting different colors. This method holds potential for applications such as wavelength division multiplexing with on-chip lasers.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"58 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142588408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tensile-Strained GeSn Microbridge Lasers with Lithographically Controllable Emission Wavelengths","authors":"Melvina Chen,&nbsp;Hyo-Jun Joo,&nbsp;Youngmin Kim,&nbsp;Eng Huat Toh,&nbsp;Elgin Quek,&nbsp;Zoran Ikonic,&nbsp;Wei Du*,&nbsp;Shui-Qing Yu* and Donguk Nam*,&nbsp;","doi":"10.1021/acsphotonics.4c0117310.1021/acsphotonics.4c01173","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01173https://doi.org/10.1021/acsphotonics.4c01173","url":null,"abstract":"<p >GeSn alloys are considered a promising solution to long-sought on-chip industry-compatible light sources. Relentless efforts to improve the performance of GeSn lasers include utilizing tensile strain engineering. However, inducing tensile strain in GeSn has been challenging due to residual compressive strain in the GeSn layer, necessitating complex fabrication processes such as multiple deposition of external stressors. Here, we demonstrate tensile-strained GeSn microbridge lasers by harnessing a geometric strain-inversion technique enabled by a single lithography step. Multiple lasers producing different emission wavelengths were fabricated on a single chip by lithographically controlling the tensile strain. Upon the application of tensile strain, the emission wavelength was tuned by more than 45 nm, while the laser threshold was reduced by almost 70%. This work presents a simple, cost-effective way to build a large array of on-chip lasers emitting different colors. This method holds potential for applications such as wavelength division multiplexing with on-chip lasers.</p>","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4502–4506 4502–4506"},"PeriodicalIF":6.5,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Epitaxial Engineering of FAPbBr3/FAPbBr3–xClx Heterojunctions for Sensitive X-ray and α-Particle Detection","authors":"Tongyang Wang, Xin Zhang, Quanchao Zhang, Xin Liu, Haowen Luo, Yingying Hao, Ruichen Bai, Lingyan Xu, Jianxi Liu, Yadong Xu","doi":"10.1021/acsphotonics.4c01214","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01214","url":null,"abstract":"Halide perovskite crystals have attracted extensive research in the field of radiation detection, thanks to their superior carrier transport abilities and facile solution preparation methods. However, dark current instability is common in perovskite single-crystal devices, especially under high bias voltages. Herein, we achieve the modulation of surface defects by epitaxial growth to obtain heterogeneous crystals with high crystalline quality, developing FAPbBr₃/FAPbBr_3–<i>x</i>Cl_<i>x</i> heterojunctions to address severely increased dark current. The FAPbBr₃/FAPbBr_2.7Cl_0.3 heterojunction exhibits reduced trap-state density and a significant built-in potential difference. Based on the effective utilization of the dark current cutoff effect of the heterojunctions, a dark current of 0.83 μA·cm^–2 is realized for the FAPbBr₃/FAPbBr_2.7Cl_0.3 detector, which is 7.5% of that based on an intrinsic FAPbBr₃ single crystal. Thus, an optimal sensitivity of 33612 μC·Gy_air^–1·cm^–2 for Au/FAPbBr₃/FAPbBr_2.7Cl_0.3/Au detector was achieved, at a bias of −250 V. Simultaneously, an energy resolution of 15.2% for ²⁴¹Am @ 5.49 MeV α-particle-induced pulse height spectra was recognized. Our work not only establishes a new benchmark for FAPbBr₃-based perovskite performance but also presents a pragmatic strategy to lower the harmful dark current in three-dimensional halide perovskite single crystals.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"12 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single-Base Resolution Photonic-Integrated Chips via Hybrid Dielectric–Metal Nanocavities for Ultrasensitive Multichannel Biosensing","authors":"Bowen Du,&nbsp;Yule Zhang,&nbsp;Fuquan Xie,&nbsp;Zhi Chen,&nbsp;Songrui Wei,&nbsp;Yanqi Ge,&nbsp;Xilin Tian,&nbsp;Qiao Jiang,&nbsp;Qiuliang Wang,&nbsp;Xueji Zhang,&nbsp;Defa Li,&nbsp;Zhongjian Xie* and Han Zhang*,&nbsp;","doi":"10.1021/acsphotonics.4c0143710.1021/acsphotonics.4c01437","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01437https://doi.org/10.1021/acsphotonics.4c01437","url":null,"abstract":"<p >The development of highly precise and rapid biological photonic-integrated chips with single-base resolution for target gene detection holds immense potential to revolutionize genetic diagnostics and nonlinear optical devices. Our recent study presents the design of a single-base resolution photonic-integrated chip (SRPIC) with multichannel biosensing capabilities, enabling discrimination between gene segment sequences differing by a single nucleotide at sample concentrations below 1 fM. Through the utilization of hybrid dielectric–metal nanocavity arrays, the SRPIC established an efficient biosensing platform by motivating light-biological matter coupling behavior. This accomplishment represents an extraordinary 10⁴-fold increase in the limit of detection (LOD) compared with the CRISPR-HOLMES technique, exhibiting nearly impeccable precision during clinical testing. Our research highlights the potential of SRPIC as a powerful tool for the development of high-performance photonic-integrated chips capable of achieving multichannel single-base resolution biosensing, with each channel representing the detection of a single virus.</p>","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4948–4957 4948–4957"},"PeriodicalIF":6.5,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142673996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid On-Demand Design of Inverted All-Dielectric Metagratings for Trace Terahertz Molecular Fingerprint Sensing by Deep Learning","authors":"Xueying Liu,&nbsp;Yinong Xie,&nbsp;Yiming Yan,&nbsp;Qiang Niu,&nbsp;Li-Guo Zhu,&nbsp;Zhaogang Dong,&nbsp;Qing Huo Liu and Jinfeng Zhu*,&nbsp;","doi":"10.1021/acsphotonics.4c0135810.1021/acsphotonics.4c01358","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01358https://doi.org/10.1021/acsphotonics.4c01358","url":null,"abstract":"<p >Metasurface design with a multiplexing scheme holds promise for enhancing trace detection of terahertz (THz) molecular fingerprints. Conventional designs rely on matching spectral resonance positions with fingerprints of trace analytes, which require laborious metastructure optimizations by performing massive optical simulations. Recently, deep learning (DL) has indicated great potential for designing metasurfaces. However, its design application for THz fingerprint metasurface sensors has barely been reported so far. Here, we present a DL architecture of a bidirectional neural network to design an inverted all-dielectric metagrating (IAM) for trace THz fingerprint sensing. Based on a given THz fingerprint spectrum, our DL design tool can flexibly customize the critical sensing structure of the metagrating with the corresponding resonance frequency. Combining the designed IAM with angle multiplexing, one can excite a sequence of guided-mode resonances in a wide THz band, which supports elevating the THz fingerprint detection performance on a flat sensing surface. The DL design is used to guide the fabrication and measurement of IAM for trace α-lactose sensing, where the experimental results demonstrate metasensing enhancement by 9.3 times and imply the fast and powerful capability of our design method. Our research will inspire more DL applications on quick on-demand designs for many other THz metadevices and metasystems.</p>","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"11 11","pages":"4838–4845 4838–4845"},"PeriodicalIF":6.5,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142671200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rapid On-Demand Design of Inverted All-Dielectric Metagratings for Trace Terahertz Molecular Fingerprint Sensing by Deep Learning","authors":"Xueying Liu, Yinong Xie, Yiming Yan, Qiang Niu, Li-Guo Zhu, Zhaogang Dong, Qing Huo Liu, Jinfeng Zhu","doi":"10.1021/acsphotonics.4c01358","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01358","url":null,"abstract":"Metasurface design with a multiplexing scheme holds promise for enhancing trace detection of terahertz (THz) molecular fingerprints. Conventional designs rely on matching spectral resonance positions with fingerprints of trace analytes, which require laborious metastructure optimizations by performing massive optical simulations. Recently, deep learning (DL) has indicated great potential for designing metasurfaces. However, its design application for THz fingerprint metasurface sensors has barely been reported so far. Here, we present a DL architecture of a bidirectional neural network to design an inverted all-dielectric metagrating (IAM) for trace THz fingerprint sensing. Based on a given THz fingerprint spectrum, our DL design tool can flexibly customize the critical sensing structure of the metagrating with the corresponding resonance frequency. Combining the designed IAM with angle multiplexing, one can excite a sequence of guided-mode resonances in a wide THz band, which supports elevating the THz fingerprint detection performance on a flat sensing surface. The DL design is used to guide the fabrication and measurement of IAM for trace α-lactose sensing, where the experimental results demonstrate metasensing enhancement by 9.3 times and imply the fast and powerful capability of our design method. Our research will inspire more DL applications on quick on-demand designs for many other THz metadevices and metasystems.","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"8 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Solvent-Engineered Strategy Synthesis of Multicolor Fluorescent Carbon Dots for Advanced Solid-State Lighting Applications","authors":"Qingxin Zeng, Haiyan Qi, Tao Jing, Jun Li, Siqi Shen, Hongxu Zhao, Yang Gao","doi":"10.1021/acsphotonics.4c01188","DOIUrl":"https://doi.org/10.1021/acsphotonics.4c01188","url":null,"abstract":"At present, achieving tunable fluorescent carbon dots (CDs) with narrow full width at half-maximum (FWHM) and high fluorescence quantum yields (QYs) remains a significant challenge. In our study, <span>l</span>-tryptophan and <i>o</i>-phenylenediamine were utilized as precursors, systematically controlling their band gaps and surface states by varying the solvent type. The blue (B-CDs), yellow-green (YG-CDs), and red (R-CDs) fluorescent CDs were successfully prepared, with optimal excitation wavelengths (λ_ex) of 444, 537, and 597 nm, respectively. Especially, these multicolor CDs (M-CDs) exhibited impressive QYs of 53.69, 54.88, and 58.79%, and narrow FWHM of 71, 64, and 34 nm, respectively. Their distinct optical properties were achieved by manipulating the carbonization and dehydration processes through a solvent selection. The variations in optical properties were primarily attributed to increased amino nitrogen content, quantum size, and coordinated effects of surface oxidation states. Furthermore, M-CDs were successfully incorporated into polyvinyl alcohol (PVA) to produce transparent and flexible fluorescent films, demonstrating their excellent and stable optical quality. Finally, the potential of M-CDs in optoelectronic applications was showcased by fabricating bright light-emitting diodes (LEDs).","PeriodicalId":23,"journal":{"name":"ACS Photonics","volume":"1 1","pages":""},"PeriodicalIF":7.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}