Optical Materials Express最新文献

{"title":"Near-visible topological edge states in a silicon nitride platform","authors":"David Sharp, Christopher Flower, Mahmoud Jalali Mehrabad, Arnab Manna, Hannah Rarick, Rui Chen, Mohammad Hafezi, Arka Majumdar","doi":"10.1364/ome.524958","DOIUrl":"https://doi.org/10.1364/ome.524958","url":null,"abstract":"Demonstrations of topological photonics have so far largely been confined to infrared wavelengths where imaging technology and access to low-dimensional quantum materials are both limited. Here, we designed and fabricated silicon nitride ring-resonator arrays to demonstrate photonic topological edge states at ∼780 nm. We observed edge states corresponding to the integer quantum Hall Hamiltonian with topological protection against fabrication disorder. This demonstration extends the concept of topological edge states to the near-visible regime and paves the way for nonlinear and non-Hermitian topological photonics with the rich library of near-visible quantum emitters.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"85 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced Solid-State Lasers: feature issue introduction","authors":"Mark S. Bowers, Patrice Camy, Mark Dubinskii, Yushi Kaneda, Patricia Segonds","doi":"10.1364/ome.530773","DOIUrl":"https://doi.org/10.1364/ome.530773","url":null,"abstract":"This joint issue of Optics Express and Optical Materials Express features 23 peer-reviewed articles primarily by authors who participated in the Advanced Solid State Lasers conference, which was part of the Optica Laser Congress held in Tacoma, Washington, USA on October 8-12, 2023. This review provides a brief summary of these articles covering the latest developments in laser gain materials and nonlinear crystals, mode-locked lasers, fiber lasers and amplifiers, nonlinear optical sources, and novel concepts in laser design.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"22 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crystallization of Y3Fe5O12 thin films on silicon photonic waveguides using CO2 laser annealing","authors":"Junxian Wang, Songgang Cai, Yucong Yang, Zixuan Wei, Tianchi Zhang, Wei Yan, Lei Bi","doi":"10.1364/ome.523799","DOIUrl":"https://doi.org/10.1364/ome.523799","url":null,"abstract":"We report the local crystallization of Y<jats:sub>3</jats:sub>Fe<jats:sub>5</jats:sub>O<jats:sub>12</jats:sub> (YIG) thin films grown on Si substrates, and SOI waveguides by CO<jats:sub>2</jats:sub> laser annealing (LA). The effect of laser power and oxygen pressure on the crystal structure of YIG films was systematically studied. Laser power dominated the YIG film crystallinity, while oxygen partial pressure during LA strongly influenced the crystal grain size and magnetic anisotropy. Fully crystallized YIG thin films with pure garnet phases were fabricated by LA. The refractive index n and extinction coefficient k were comparable to thin films fabricated by rapid thermal annealing (RTA). Propagation loss measured at 1550 nm wavelength on YIG/SOI waveguides and YIG/SiN ring resonators were comparable to RTA annealed films, promising device development for silicon photonics.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"44 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing Pr3+ and Nd3+ for deactivating the Er3+: 4I13/2 level in lanthanum titanate glass","authors":"Brian Topper, Alexander Neumann, Stephen K. Wilke, Randall E. Youngman, Abdulrahman Alrubkhi, and Richard Weber","doi":"10.1364/ome.517790","DOIUrl":"https://doi.org/10.1364/ome.517790","url":null,"abstract":"Erbium lanthanum titanate glasses were prepared by levitation melting for the spectroscopic study of ways to promote the mid-infrared fluorescence. Two series of heavily erbium doped glasses (15 wt%) were prepared with the addition of either Pr³⁺ or Nd³⁺ in amounts relative to Er³⁺ of 0.05, 0.1, and 0.2. Both ions quench the lower Er³⁺ laser level with the Pr³⁺ doing so more rapidly. Although high co-dopant concentrations result in higher energy transfer, as clearly evidenced in upconversion and downconversion fluorescence measurements, the mid-infrared lifetime also suffers a reduction and, therefore, a balance must be struck in the co-dopant concentration. Lifetime and spectral measurements indicate that, at a fixed relative co-dopant amount, Pr³⁺ is more effective than Nd³⁺ at removing the bottleneck of the Er³⁺ ⁴<i>I</i>_13/2 level. Moreover, consideration of the lifetimes alongside the absorption data of the individual ions indicates that despite the large absorption cross-section of Nd³⁺ at 808 nm, the concentration needed to yield more absorbed power than utilizing direct 976 nm excitation of Er³⁺ results in unfavorable lifetimes of the mid-infrared transition. In the end, Pr³⁺ prevails as the superior co-dopant in terms of the effects on fluorescence lifetimes as well as potential laser system design considerations. In a unique self-doping approach, a reducing melt atmosphere of Ar instead of O₂ creates a small fraction of Ti³⁺. In 5Er₂O₃-12La₂O₃-83TiO₂ glass, the presence of Ti³⁺ quenches the ⁴<i>I</i>_13/2 emission about 2.6 times more than the ⁴<i>I</i>_11/2 when lifetimes are compared to an O₂ melt environment. As an additional means of increasing the mid-infrared emission, the effect of temperature on the mid- and near- infrared lifetimes of a lightly doped lanthanum titanate composition is investigated between 77-300 K. The mid-infrared lifetime increases by ∼30% while the near-infrared lifetime increases by ∼10%, which suggests in addition to co-doping, active cooling of the gain media will further enhance performance.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"38 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of broadband high efficiency Mid-IR gratings for high-energy ultrafast lasers","authors":"Trevor B. Chen, Bangzhi Liu, Jake A. McCoy, Guy Lavallee, Michael Labella, William Mahony, Shane Miller, Chad Eichfeld, Naibo Jiang, and Paul S. Hsu","doi":"10.1364/ome.521507","DOIUrl":"https://doi.org/10.1364/ome.521507","url":null,"abstract":"Broadband high-efficiency diffraction gratings play a crucial role in the pulse stretcher and compressor of high-energy ultrafast lasers. Nevertheless, conventional grating manufacturing techniques, including mechanical ruling and holographic recording, face challenges in creating accurate blazed groove profiles necessary for the fabrication of broadband, high-efficiency mid-infrared gratings. In this work, we utilized combined electron-beam lithography and anisotropic wet etching technology to fabricate nearly perfect blazed grooves, producing high efficiency broadband mid-infrared (IR) grating for 4.3 µm 100 femtosecond laser. Global optimization was performed to achieve a design of &gt; 90% efficiency over spectral range of 3.6 µm – 6.6 µm. Hybrid metal-dielectric coating (Au-Al₂O₃) is employed and optimized to minimize absorption and to enhance diffraction efficiency and laser-induced damage threshold (LIDT). Prototype gratings undergo testing at a desired application wavelengths of 4.3 µm in a tunable range of 0.2 µm, revealing that the optimal sample achieves a diffraction efficiency of 92%, closely approaching the theoretical value of 94.2%","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"17 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140623958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Space-time modulated loaded-wire metagratings for magnetless nonreciprocity and near-complete frequency conversion","authors":"Yakir Hadad and Dimitrios Sounas","doi":"10.1364/ome.515628","DOIUrl":"https://doi.org/10.1364/ome.515628","url":null,"abstract":"In recent years, significant progress has been made in the development of magnet-less nonreciprocity using space-time modulation, both in electromagnetics and acoustics. This approach has so far resulted in a plethora of non-reciprocal devices, such as isolators and circulators, over different parts of the spectrum, for guided waves. On the other hand, very little work has been performed on non-reciprocal devices for waves propagating in free space, which can also have many practical applications. For example, it was shown theoretically that non-reciprocal scattering by a metasurface can be obtained if the surface-impedance operator is continuously modulated in space and time. However, the main challenge in the realization of such a metasurface is due to the high complexity required to modulate in space and time many sub-wavelength unit-cells of which the metasurface consists. In this paper, we show that spatiotemporally modulated metagratings can lead to strong nonreciprocal responses, even though they are based on electrically-large unit cells and use only three modulation domains. We specifically focus on wire metagratings loaded with time-modulated capacitances. We use the discrete-dipole approximation and an ad-hoc generalization of the theory of polarizability for time-modulated particles and demonstrate an effective non-reciprocal anomalous reflection (diffraction) with an efficient frequency conversion. Thus, our work opens a venue for a practical design and implementation of highly non-reciprocal magnet-less metasurfaces in electromagnetics and acoustics.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"21 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140615340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Beyond Order: Random, Aperiodic, and Hyperuniform Photonic Materials: introduction to the special issue","authors":"Luca Dal Negro, Hui Cao, Marcel Filoche, Sebastian A. Schulz, Silvia Vignolini, and Diederik S. Wiersma","doi":"10.1364/ome.527426","DOIUrl":"https://doi.org/10.1364/ome.527426","url":null,"abstract":"The editors introduce the feature issue on “Beyond Order: Random, Aperiodic, and Hyperuniform Photonic Materials,” which includes nine articles.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"111 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140615295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial wavefront shaping with a multipolar-resonant metasurface for structured illumination microscopy [Invited]","authors":"Tamal Roy, Peter T. Brown, Douglas P. Shepherd, and Lisa V. Poulikakos","doi":"10.1364/ome.520736","DOIUrl":"https://doi.org/10.1364/ome.520736","url":null,"abstract":"Structured illumination microscopy (SIM) achieves superresolution in fluorescence imaging through patterned illumination and computational image reconstruction, yet current methods require bulky, costly modulation optics and high-precision optical alignment, thus hindering the widespread implementation of SIM. To address this challenge, this work demonstrates how nano-optical metasurfaces, rationally designed to tailor the far-field optical wavefront at sub-wavelength dimensions, hold great potential as ultrathin, single-surface, all-optical wavefront modulators for SIM. We computationally demonstrate this principle with a multipolar-resonant metasurface composed of silicon nanostructures that generate versatile optical wavefronts in the far field upon variation of the polarization or angle of incident light. Algorithmic optimization is performed to identify the seven most suitable illumination patterns for SIM generated by the metasurface based on three key criteria. We quantitatively demonstrate that multipolar-resonant metasurface SIM (mrm-SIM) achieves resolution gain that is comparable to conventional methods by applying the seven optimal metasurface-generated wavefronts to simulated fluorescent objects and reconstructing the objects using proximal gradient descent. Notably, we show that mrm-SIM achieves these resolution gains with a far-field illumination pattern that circumvents complex equipment and alignment requirements of comparable methodologies. The work presented here paves the way for a metasurface-enabled experimental simplification of structured illumination microscopy.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"28 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140591719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry","authors":"Hao-Jung Chang, Natalia Munera, Cesar Lopez-Zelaya, Debasmita Banerjee, Guy Beadie, Eric W. Van Stryland, and David J. Hagan","doi":"10.1364/ome.519907","DOIUrl":"https://doi.org/10.1364/ome.519907","url":null,"abstract":"There is growing interest in the refractive index of liquids beyond the visible and into the short-wave infrared (SWIR) for applications such as the study of liquid-core fibers and supercontinuum generation. However, most of the data reported are in the visible. For liquids with a wide transmission window in the SWIR region, refractive index data are sparse. We present a Rayleigh interferometry-based refractometer to characterize the refractive index relative to standard materials at seven different wavelengths (543.4, 632.8, 780, 973, 1064, 1550, and 1970 nm) at a temperature of ~ 21.3 ± 0.6 °C. We also show Sellmeier fits using our results juxtaposed with previously published data. Our data extends previous work to the SWIR.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"52 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140591614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"InAs quantum dots with a narrow photoluminescence linewidth for a lower threshold current density in 1.55 µm lasers: erratum","authors":"Bin Wang, Xuezhe Yu, Yugang Zeng, Weijie Gao, Wei Chen, Haoyu Shen, Kedi Ma, Hongxiao Li, Zizhuo Liu, Hui Su, Li Qin, Yongqiang Ning, and Lijun Wang","doi":"10.1364/ome.525259","DOIUrl":"https://doi.org/10.1364/ome.525259","url":null,"abstract":"We address and correct errors identified in our previously published article [Opt. Mater. Express <b>14</b>, 1074 (2024) [CrossRef] <span aria-hidden=\"true\"> </span>]. The corrections necessitate modifications to the text of the original paper, leading to its rephrasing for clarity and accuracy.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"17 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140591617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}