Tugba Temel, Robert T. Murray, Li Wang, Weidong Chen, André Schirrmacher, Ronan A. Battle, and Valentin Petrov
A PPLN non-resonant optical parametric oscillator injection-seeded by narrowband sub-100-mW CW radiation at the signal wavelength produces > 3 W idler average power at 2376 nm for a 20-kHz repetition rate, with a sub-2-nm spectral linewidth. The maximum quantum efficiency reaches 39.5%, roughly 1.4 times higher compared to narrowband operation achieved with a volume Bragg grating at the same pump level. Seed levels as low as 40 mW are sufficient to produce the desired spectral narrowing effect.
{"title":"Narrowband-seeded PPLN non-resonant optical parametric oscillator","authors":"Tugba Temel, Robert T. Murray, Li Wang, Weidong Chen, André Schirrmacher, Ronan A. Battle, and Valentin Petrov","doi":"10.1364/ome.517919","DOIUrl":"https://doi.org/10.1364/ome.517919","url":null,"abstract":"A PPLN non-resonant optical parametric oscillator injection-seeded by narrowband sub-100-mW CW radiation at the signal wavelength produces > 3 W idler average power at 2376 nm for a 20-kHz repetition rate, with a sub-2-nm spectral linewidth. The maximum quantum efficiency reaches 39.5%, roughly 1.4 times higher compared to narrowband operation achieved with a volume Bragg grating at the same pump level. Seed levels as low as 40 mW are sufficient to produce the desired spectral narrowing effect.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140070639","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}
Ginka Exner, Peter G. Schunemann, Elizabeth Ivanova, Aleksandar Grigorov, Valentin Petrov
{"title":"Nanohardness and Young’s Modulus of II-IV-V₂ Chalcopyrite Nonlinear Optical Crystals: A Comparative Study","authors":"Ginka Exner, Peter G. Schunemann, Elizabeth Ivanova, Aleksandar Grigorov, Valentin Petrov","doi":"10.1364/ome.518187","DOIUrl":"https://doi.org/10.1364/ome.518187","url":null,"abstract":"","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140262469","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}
Julia Brandt, Guido Dittrich, Marc Thelen, Hagen Renner, Patrick Huber, Manfred Eich, and Alexander Petrov
The optical properties of dielectric materials with subwavelength cylindrical pores are commonly described by effective medium models. We compare the Maxwell Garnett and the Bruggeman effective medium models for porous silicon with simulations and experiments for the case of polarization orthogonal to the pore axis. The Maxwell Garnett model matches the results of the simulations even up to very high porosities. An experimental study of the effective permittivity of macroporous and mesoporous silicon is conducted by analyzing the Fabry-Pérot oscillations in the long-wavelength limit. These experimental results are also consistent with the Maxwell Garnett model. We advocate using this model for media with cylindrical pores in the future.
{"title":"On the applicability of the Maxwell Garnett effective medium model to media with a high density of cylindrical pores","authors":"Julia Brandt, Guido Dittrich, Marc Thelen, Hagen Renner, Patrick Huber, Manfred Eich, and Alexander Petrov","doi":"10.1364/ome.516125","DOIUrl":"https://doi.org/10.1364/ome.516125","url":null,"abstract":"The optical properties of dielectric materials with subwavelength cylindrical pores are commonly described by effective medium models. We compare the Maxwell Garnett and the Bruggeman effective medium models for porous silicon with simulations and experiments for the case of polarization orthogonal to the pore axis. The Maxwell Garnett model matches the results of the simulations even up to very high porosities. An experimental study of the effective permittivity of macroporous and mesoporous silicon is conducted by analyzing the Fabry-Pérot oscillations in the long-wavelength limit. These experimental results are also consistent with the Maxwell Garnett model. We advocate using this model for media with cylindrical pores in the future.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140070702","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":"Reciprocally tailored transparent artificial media for frequency and direction dependent light trapping","authors":"Meraj-E- Mustafa, M. Eich, Alexander Petrov","doi":"10.1364/ome.515338","DOIUrl":"https://doi.org/10.1364/ome.515338","url":null,"abstract":"","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140079091","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}
In this study, an optical trapping technique is employed to manipulate the scatterer distribution within a random laser medium. By focusing the trapping beams into small regions within the three-dimensional scattering medium, the scattering particles around them are concentrated in those regions, resulting in an inhomogeneous scatterer distribution. The experimental results show that optical trapping increases the maximum spike intensity in the emission spectrum. Furthermore, the spectral spike intensity depends on the power of the trap spots. The relationship between the maximum and average spike intensities in the emission spectra exhibits a characteristic observed in other random lasers with inhomogeneous scatterer distributions.
{"title":"Random laser emission from dye-doped gain media with optically trapped scattering particles","authors":"Takashi Okamoto, Naomichi Yokoi, and Takashi Kaku","doi":"10.1364/ome.510961","DOIUrl":"https://doi.org/10.1364/ome.510961","url":null,"abstract":"In this study, an optical trapping technique is employed to manipulate the scatterer distribution within a random laser medium. By focusing the trapping beams into small regions within the three-dimensional scattering medium, the scattering particles around them are concentrated in those regions, resulting in an inhomogeneous scatterer distribution. The experimental results show that optical trapping increases the maximum spike intensity in the emission spectrum. Furthermore, the spectral spike intensity depends on the power of the trap spots. The relationship between the maximum and average spike intensities in the emission spectra exhibits a characteristic observed in other random lasers with inhomogeneous scatterer distributions.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140070638","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}
Production of flat optics incorporating subwavelength features, particularly at visible frequencies, remains a significant challenge. Here, we establish a framework for the design of effective medium metasurfaces (EMM), relying on nanoimprinting of mesoporous silicon to realize a patterned refractive index n(x,y) corresponding to an arbitrary transmitted phase profile ϕ(x,y). The method is used to design the stamp profile required to produce a Fresnel lens and the theoretical performance of the metalens is examined using the finite-difference time-domain method. Additionally, we demonstrate neural network aided Monte Carlo analysis as a method to model the effects of metasurface fabrications errors on EMM performance and process yield.
{"title":"Effective medium metasurfaces using nanoimprinting of the refractive index: design, performance, and predictive tolerance analysis","authors":"Matthew Panipinto and Judson D. Ryckman","doi":"10.1364/ome.515617","DOIUrl":"https://doi.org/10.1364/ome.515617","url":null,"abstract":"Production of flat optics incorporating subwavelength features, particularly at visible frequencies, remains a significant challenge. Here, we establish a framework for the design of effective medium metasurfaces (EMM), relying on nanoimprinting of mesoporous silicon to realize a patterned refractive index <i>n</i>(x,y) corresponding to an arbitrary transmitted phase profile <i>ϕ</i>(x,y). The method is used to design the stamp profile required to produce a Fresnel lens and the theoretical performance of the metalens is examined using the finite-difference time-domain method. Additionally, we demonstrate neural network aided Monte Carlo analysis as a method to model the effects of metasurface fabrications errors on EMM performance and process yield.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140128605","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}
M. H. Mostafa, M. Mirmoosa, Mikhail Sidorenko, V. Asadchy, Sergei Tretyakov
{"title":"Temporal interfaces in complex electromagneticmaterials: An overview","authors":"M. H. Mostafa, M. Mirmoosa, Mikhail Sidorenko, V. Asadchy, Sergei Tretyakov","doi":"10.1364/ome.516179","DOIUrl":"https://doi.org/10.1364/ome.516179","url":null,"abstract":"","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140082988","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}
Luis A. Razo-López, Geoffroy J. Aubry, Felipe A. Pinheiro, and Fabrice Mortessagne
Strong localization of electromagnetic waves in 3D has never been experimentally achieved in uncorrelated disordered systems. By going beyond the paradigm of disordered systems, this goal has been recently reached in deterministic aperiodic planar Vogel spiral arrays in the microwave regime. Here we present a comprehensive description of the experimental details that have been used to observe electromagnetic localization in Vogel spirals beyond 2D. By providing an experimental roadmap to describe microwave transport in Vogel spirals we introduce a novel system platform to demonstrate electromagnetic localization in 3D that outperforms traditional disordered systems for that purpose.
{"title":"Aperiodicity is more effective than disorder in localizing electromagnetic waves [Invited]","authors":"Luis A. Razo-López, Geoffroy J. Aubry, Felipe A. Pinheiro, and Fabrice Mortessagne","doi":"10.1364/ome.514886","DOIUrl":"https://doi.org/10.1364/ome.514886","url":null,"abstract":"Strong localization of electromagnetic waves in 3D has never been experimentally achieved in uncorrelated disordered systems. By going beyond the paradigm of disordered systems, this goal has been recently reached in deterministic aperiodic planar Vogel spiral arrays in the microwave regime. Here we present a comprehensive description of the experimental details that have been used to observe electromagnetic localization in Vogel spirals beyond 2D. By providing an experimental roadmap to describe microwave transport in Vogel spirals we introduce a novel system platform to demonstrate electromagnetic localization in 3D that outperforms traditional disordered systems for that purpose.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009019","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}
Alexandre Selvestrel, Julia Rocha, Rémi Carminati, and Romain Pierrat
We theoretically study the propagation of light in one-dimensional space- and time-dependent disorder. The disorder is described by a fluctuating permittivity ε(x, t) exhibiting short-range correlations in space and time, without cross correlation between them. Depending on the illumination conditions, we show that the intensity of the average field decays exponentially in space or in time, with characteristic length or time defining the scattering mean-free path ℓs and the scattering mean-free time τs. In the weak scattering regime, we provide explicit expressions for ℓs and τs, that are checked against rigorous numerical simulations.
{"title":"Multiple scattering theory in one dimensional space and time dependent disorder: average field [Invited]","authors":"Alexandre Selvestrel, Julia Rocha, Rémi Carminati, and Romain Pierrat","doi":"10.1364/ome.517488","DOIUrl":"https://doi.org/10.1364/ome.517488","url":null,"abstract":"We theoretically study the propagation of light in one-dimensional space- and time-dependent disorder. The disorder is described by a fluctuating permittivity ε(<i>x, t</i>) exhibiting short-range correlations in space and time, without cross correlation between them. Depending on the illumination conditions, we show that the intensity of the average field decays exponentially in space or in time, with characteristic length or time defining the scattering mean-free path ℓ<sub><i>s</i></sub> and the scattering mean-free time <i>τ</i><sub><i>s</i></sub>. In the weak scattering regime, we provide explicit expressions for ℓ<sub><i>s</i></sub> and <i>τ</i><sub><i>s</i></sub>, that are checked against rigorous numerical simulations.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009251","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}
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