npj Nanophotonics最新文献

AlGaN/AlN heterostructures: an emerging platform for integrated photonics. AlGaN/AlN异质结构：集成光子学的新兴平台。

npj Nanophotonics Pub Date : 2025-01-01 Epub Date: 2025-01-07 DOI: 10.1038/s44310-024-00048-z

Sinan Gündoğdu, Sofia Pazzagli, Tommaso Pregnolato, Tim Kolbe, Sylvia Hagedorn, Markus Weyers, Tim Schröder

{"title":"AlGaN/AlN heterostructures: an emerging platform for integrated photonics.","authors":"Sinan Gündoğdu, Sofia Pazzagli, Tommaso Pregnolato, Tim Kolbe, Sylvia Hagedorn, Markus Weyers, Tim Schröder","doi":"10.1038/s44310-024-00048-z","DOIUrl":"10.1038/s44310-024-00048-z","url":null,"abstract":"We introduce a novel material for integrated photonics and investigate aluminum gallium nitride (AlGaN) on aluminum nitride (AlN) templates as a platform for developing reconfigurable and on-chip nonlinear optical devices. AlGaN combines compatibility with standard photonic fabrication technologies and high electro-optic modulation capabilities with low loss over a broad spectral range, from UVC to long-wave infrared, making it a viable material for complex photonic applications. In this work, we design and grow AlGaN/AlN heterostructures and integrate several photonic components. In particular, we fabricate edge couplers, low-loss waveguides, directional couplers, and tunable high-quality factor ring resonators. These devices will enable nonlinear light-matter interaction and quantum functionality. The comprehensive platform we present in this work paves the way for photon-pair generation applications, on-chip quantum frequency conversion, and fast electro-optic modulation for switching and routing classical and quantum light fields.","PeriodicalId":501711,"journal":{"name":"npj Nanophotonics","volume":"2 1","pages":"2"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11706782/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142960981","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}

引用次数: 0

Linear optical wave energy redistribution methods for photonic signal processing. 光子信号处理中的线性光波能量重分配方法。

npj Nanophotonics Pub Date : 2025-01-01 Epub Date: 2025-04-03 DOI: 10.1038/s44310-025-00060-x

Connor Rowe, Xinyi Zhu, Benjamin Crockett, Geunweon Lim, Majid Goodarzi, Manuel Fernández, James van Howe, Hao Sun, Saket Kaushal, Afsaneh Shoeib, José Azaña

{"title":"Linear optical wave energy redistribution methods for photonic signal processing.","authors":"Connor Rowe, Xinyi Zhu, Benjamin Crockett, Geunweon Lim, Majid Goodarzi, Manuel Fernández, James van Howe, Hao Sun, Saket Kaushal, Afsaneh Shoeib, José Azaña","doi":"10.1038/s44310-025-00060-x","DOIUrl":"10.1038/s44310-025-00060-x","url":null,"abstract":"Manipulating the phase of an optical wave over time and frequency gives full control to the user to implement a wide variety of energy preserving transformations directly in the analogue optical domain. These can be achieved using widely available linear mechanisms, such as temporal phase modulation and spectral phase filtering. The techniques based on these linear optical wave energy redistribution (OWER) methods are inherently energy efficient and have significant speed and bandwidth advantages over digital signal processing. We describe several recent OWER methods for optical signal processing, including denoising passive amplification, real-time spectrogram analysis, passive logic computing, and more. These functionalities are relevant whenever the signal is found on a classical or quantum optical wave, or could be upconverted from radio frequencies or microwaves, and they are of interest for a wide range of applications in telecommunications, sensing, metrology, biomedical imaging, and astronomy. The energy preservation of these methods makes them particularly interesting for quantum optics applications. Furthermore, many of the individual components have been demonstrated on-chip, enabling miniaturization for applications where size and weight are a main constraint.","PeriodicalId":501711,"journal":{"name":"npj Nanophotonics","volume":"2 1","pages":"13"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11968407/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143797548","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}

引用次数: 0

Perspectives of chiral nanophotonics: from mechanisms to biomedical applications 手性纳米光子学的前景：从机制到生物医学应用

npj Nanophotonics Pub Date : 2024-12-04 DOI: 10.1038/s44310-024-00045-2

Seongmin Im, Seyedehniousha Mousavi, Yun-Sheng Chen, Yang Zhao

引用次数: 0

Broadband cavity-enhanced Kerr Comb spectroscopy on Chip 片上宽带腔增强克尔梳光谱

npj Nanophotonics Pub Date : 2024-12-04 DOI: 10.1038/s44310-024-00047-0

Andrei Diakonov, Konstantin Khrizman, Eliran Zano, Liron Stern

{"title":"Broadband cavity-enhanced Kerr Comb spectroscopy on Chip","authors":"Andrei Diakonov, Konstantin Khrizman, Eliran Zano, Liron Stern","doi":"10.1038/s44310-024-00047-0","DOIUrl":"10.1038/s44310-024-00047-0","url":null,"abstract":"The broad and equidistant spectrum of frequency combs has had a profound impact on spectroscopic studies. Particularly, experiments involving the coupling of frequency combs to cavities have already enabled unprecedented broadband and sensitive spectroscopy on a single-molecule level. The emergence of integrated, compact, and broadband Kerr-microcombs holds promise to bring many metrological and spectroscopic studies outside of the lab. However, performing cavity-enhanced direct frequency comb spectroscopy on-chip has remained a challenge. Here, we couple a microcomb source with a microcavity to extend the advantages of cavity-enhanced spectroscopy to photonically integrated circuits. By harnessing the coherent nature of the Kerr-comb and high-Q microcavity enhancement, we obtain a detailed dispersion landscape of the guided-wave mode and comprehensive frequency-dependent cavity lineshapes. Our microcomb-cavity coupling can facilitate photonically integrated cavity-enhanced biochemical spectroscopy by evanescently coupling analytes to the cavity’s guided mode, a mode of operation we analyze numerically and provide guidelines for its potential implementation. Demonstrated detailed dispersion measurements, overperforming state-of-the-art table-top tunable lasers in available bandwidth, show potential for integrated non-linear optics applications, as precise dispersion management is crucial for such processes. Our chip-scale comb-cavity coupled platform suggests an integrated, broadband, cost-effective, and accurate tool for the non-linear optics studies as well as for ultra-compact bio- and chemical-sensing platform.","PeriodicalId":501711,"journal":{"name":"npj Nanophotonics","volume":" ","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44310-024-00047-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762963","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}

引用次数: 0

Teleportation of a genuine single-rail vacuum-one-photon qubit generated via a quantum dot source 通过量子点源生成的真正单轨真空一光子量子比特的远距离传输

npj Nanophotonics Pub Date : 2024-11-29 DOI: 10.1038/s44310-024-00046-1

Beatrice Polacchi, Francesco Hoch, Giovanni Rodari, Stefano Savo, Gonzalo Carvacho, Nicolò Spagnolo, Taira Giordani, Fabio Sciarrino

{"title":"Teleportation of a genuine single-rail vacuum-one-photon qubit generated via a quantum dot source","authors":"Beatrice Polacchi, Francesco Hoch, Giovanni Rodari, Stefano Savo, Gonzalo Carvacho, Nicolò Spagnolo, Taira Giordani, Fabio Sciarrino","doi":"10.1038/s44310-024-00046-1","DOIUrl":"10.1038/s44310-024-00046-1","url":null,"abstract":"Quantum state teleportation represents a pillar of quantum information and a milestone on the roadmap towards quantum networks with a large number of nodes. Successful photonic demonstrations of this protocol have been carried out employing different qubit encodings. However, demonstrations in the Fock basis encoding are challenging, due to the impossibility of generating a coherent superposition of vacuum-one photon states on a single mode with linear optics. Indeed, previous realizations only allowed the teleportation of dual-rail entangled states, by exploiting ancillary electromagnetic modes. Here, instead, we enable the quantum teleportation of pure vacuum-one-photon qubits encoded in a single spatial mode, by exploiting coherent control of a resonantly excited semiconductor quantum dot in a micro-cavity. Within our setup, we can both teleport genuine single-rail vacuum-one-photon qubits and perform entanglement swapping. Our results may disclose new quantum information processing potentialities for this encoding, whose manipulation is achievable via quantum dot single-photon sources.","PeriodicalId":501711,"journal":{"name":"npj Nanophotonics","volume":" ","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44310-024-00046-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737664","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}

引用次数: 0

Non-Hermitian selective thermal emitter for thermophotovoltaics 用于热光电的非ermitian 选择性热发射器

npj Nanophotonics Pub Date : 2024-11-21 DOI: 10.1038/s44310-024-00044-3

Ciril Samuel Prasad, Gururaj V. Naik

引用次数: 0

Optically generated droplet beams improve optoacoustic imaging of choroid thickness as an Alzheimer’s disease biomarker 光学生成的液滴束改善了作为阿尔茨海默病生物标志物的脉络膜厚度的光声成像效果

npj Nanophotonics Pub Date : 2024-11-05 DOI: 10.1038/s44310-024-00036-3

Kostas G. Mavrakis, Gerasimos Divaris, Maria Tampakaki, Saba N. Khan, Kishan Dholakia, Giannis Zacharakis

{"title":"Optically generated droplet beams improve optoacoustic imaging of choroid thickness as an Alzheimer’s disease biomarker","authors":"Kostas G. Mavrakis, Gerasimos Divaris, Maria Tampakaki, Saba N. Khan, Kishan Dholakia, Giannis Zacharakis","doi":"10.1038/s44310-024-00036-3","DOIUrl":"10.1038/s44310-024-00036-3","url":null,"abstract":"Optoacoustic microscopy faces a restricted depth of field attributed to the tightly focused Gaussian beam excitation. This limitation poses challenges in capturing high-resolution images of samples with uneven surfaces or obtaining high-quality volumetric images without z-scanning. To address this issue, we propose the use of droplet beam illumination in optoacoustic microscopy, which extends the depth of field to approximately 80 times the Rayleigh length. The droplet beam is generated using a Mach–Zehnder-type interferometer, with each arm equipped with a lens of different optical power. We demonstrate the advantages of droplet beam illumination in microscopy by showing high contrast images on fluorescent beads with a 50% improvement compared to Bessel beam illumination and subsequently imaging the posterior cavity of mice eyes. This method introduces novel perspectives to medical sciences, allowing the measurement of the choroidal layer thickness, an early indicative biomarker for Alzheimer’s disease.","PeriodicalId":501711,"journal":{"name":"npj Nanophotonics","volume":" ","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44310-024-00036-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142588288","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}

引用次数: 0

Metaphotonics with subwavelength dielectric resonators 使用亚波长介质谐振器的隐形光子学

npj Nanophotonics Pub Date : 2024-11-05 DOI: 10.1038/s44310-024-00041-6

Mikhail V. Rybin, Yuri Kivshar

引用次数: 0

Enhancing X-ray generation from twisted multilayer van der Waals materials by shaping electron wavepackets 通过塑造电子波包增强扭曲多层范德瓦耳斯材料产生的 X 射线

npj Nanophotonics Pub Date : 2024-10-26 DOI: 10.1038/s44310-024-00043-4

Lee Wei Wesley Wong, Liang Jie Wong

引用次数: 0

Photonic topological insulators in femtosecond laser direct-written waveguides 飞秒激光直写波导中的光子拓扑绝缘体

npj Nanophotonics Pub Date : 2024-10-11 DOI: 10.1038/s44310-024-00040-7

Wenchao Yan, Bin Zhang, Feng Chen

{"title":"Photonic topological insulators in femtosecond laser direct-written waveguides","authors":"Wenchao Yan, Bin Zhang, Feng Chen","doi":"10.1038/s44310-024-00040-7","DOIUrl":"10.1038/s44310-024-00040-7","url":null,"abstract":"Topological photonics attract significant interests due to their intriguing fundamental physics and potential applications. Researchers are actively exploring various artificial platforms to realize novel topological phenomena, which provides promising pathways for the development of robust photonic devices. Among these platforms, femtosecond laser direct-written photonic waveguides show unique ability to visualize intricate light dynamics in 2 + 1 dimensions, which rendering them ideal tools for investigating topological photonics. By integrating topological concepts into these waveguides, researchers not only deepen their understanding of topological physics but also provide potential methodology for developing advanced topological photonic integrated devices. In this review, we discuss recent experimental implementations of different topological phases within femtosecond laser direct-written photonic waveguides, as well as the fascinating physical phenomena induced by the interplay of topology with non-Hermiticity, nonlinearity and quantum physics are also introduced. The exploration of topological waveguide arrays shows great promise in advancing the field of topological photonics, providing a solid foundation for further research and innovation in this rapidly developing domain.","PeriodicalId":501711,"journal":{"name":"npj Nanophotonics","volume":" ","pages":"1-15"},"PeriodicalIF":0.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44310-024-00040-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415411","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}

引用次数: 0