Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597984
Xinyang Su, Yi Zheng
Three methods for measuring the average power of mid-infrared laser source generated by difference frequency generation are explored, and their pros and cons are also weighed.
探讨了差频产生中红外激光源平均功率的三种测量方法，并对其优缺点进行了权衡。
{"title":"Methods for Measuring the Power of DFG-based MIR","authors":"Xinyang Su, Yi Zheng","doi":"10.1109/PN52152.2021.9597984","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597984","url":null,"abstract":"Three methods for measuring the average power of mid-infrared laser source generated by difference frequency generation are explored, and their pros and cons are also weighed.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"28 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75297889","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597967
Miao Hu, A. Slepkov
The highly-localized and intense electromagnetic hotspots afforded by plasmonic resonances in nano-scaled metallic objects have led to many exciting biomedical applications. The equivalence between nanoplasmonic hotspots, and those due to morphology-dependent resonances in high-index dielectrics is a promising avenue of nanophotonic research. In the microwave frequency regime water is such a material (n~9), and thus cm-sized aqueous dielectric objects can become resonant to few-GHz light from microwaves, WiFi, and other communication-band sources. We are using experimental, analytical, and computational approaches for studying hotspots in aqueous dimers. Experimentally, we use a household microwave oven, grape-sized hydrogel beads, and thermal imaging to demonstrate a transition from dipole-like resonance in isolated spheres to intense hotspots at the nexus of dimers. We computationally identify a host of fundamental resonances in spherical monomers that hybridize to yield either/both internal and point-of-contact dimer modes. We demonstrate that an intuitive vector-field addition approach intuitively identifies which resonances are most likely to combine to form an axial hotspot in the dimer. The usefulness of this approach is confirmed with 3D FEM simulations.
{"title":"Microwave resonances in aqueous monomer and dimers","authors":"Miao Hu, A. Slepkov","doi":"10.1109/PN52152.2021.9597967","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597967","url":null,"abstract":"The highly-localized and intense electromagnetic hotspots afforded by plasmonic resonances in nano-scaled metallic objects have led to many exciting biomedical applications. The equivalence between nanoplasmonic hotspots, and those due to morphology-dependent resonances in high-index dielectrics is a promising avenue of nanophotonic research. In the microwave frequency regime water is such a material (n~9), and thus cm-sized aqueous dielectric objects can become resonant to few-GHz light from microwaves, WiFi, and other communication-band sources. We are using experimental, analytical, and computational approaches for studying hotspots in aqueous dimers. Experimentally, we use a household microwave oven, grape-sized hydrogel beads, and thermal imaging to demonstrate a transition from dipole-like resonance in isolated spheres to intense hotspots at the nexus of dimers. We computationally identify a host of fundamental resonances in spherical monomers that hybridize to yield either/both internal and point-of-contact dimer modes. We demonstrate that an intuitive vector-field addition approach intuitively identifies which resonances are most likely to combine to form an axial hotspot in the dimer. The usefulness of this approach is confirmed with 3D FEM simulations.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"100 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73639678","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597981
Rashin Basiri Namin, F. Chibante, P. Mascher, Z. Khatami
Silicon-based materials are useful components in microelectronics owing to their tunable electronic properties [1]. However, they are not high-quality photonics candidates for light applications due to indirect band gap nature of silicon. To enhance the light emission properties of silicon, one solution is doping with rare earth elements (RE) because of their allowed 4f transition, and sharp well-defined emission peaks [2]. RE related luminescence has attracted attention for greenhouse applications due to their efficient emissions in the photosynthetically active radiation (PAR) regions of 380 to 480 and 600 to 700 nm. The europium trivalent emission (Eu3+) is associated with $^5mathrm{D}_{0}rightarrow^{7}mathrm{F}_{2}$ transitions (red emission at 613 nm), which is of significant interest to drive plant photosynthesis [3].
{"title":"Comparison of Two Rare Earth Doping Techniques for Luminescent Europium Doped Silicon Oxide","authors":"Rashin Basiri Namin, F. Chibante, P. Mascher, Z. Khatami","doi":"10.1109/PN52152.2021.9597981","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597981","url":null,"abstract":"Silicon-based materials are useful components in microelectronics owing to their tunable electronic properties [1]. However, they are not high-quality photonics candidates for light applications due to indirect band gap nature of silicon. To enhance the light emission properties of silicon, one solution is doping with rare earth elements (RE) because of their allowed 4f transition, and sharp well-defined emission peaks [2]. RE related luminescence has attracted attention for greenhouse applications due to their efficient emissions in the photosynthetically active radiation (PAR) regions of 380 to 480 and 600 to 700 nm. The europium trivalent emission (Eu3+) is associated with $^5mathrm{D}_{0}rightarrow^{7}mathrm{F}_{2}$ transitions (red emission at 613 nm), which is of significant interest to drive plant photosynthesis [3].","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"83 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79370310","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597906
M. Zhuldybina, Lise Béliveau, C. Trudeau, T. Arikawa, F. Blanchard, K. Tanaka
The ink conductivity of V -shape antennas from printed electronics were studied with terahertz near-field microscopy.
利用太赫兹近场显微镜研究了印刷电子学中V形天线的油墨导电性。
{"title":"THz near-field characterization of printed electronics V-shape antennas","authors":"M. Zhuldybina, Lise Béliveau, C. Trudeau, T. Arikawa, F. Blanchard, K. Tanaka","doi":"10.1109/PN52152.2021.9597906","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597906","url":null,"abstract":"The ink conductivity of V -shape antennas from printed electronics were studied with terahertz near-field microscopy.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"6 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73233681","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597957
Xiaoxuan Liu, Lina Liu, M. Z. Islam, Manisha Gupta, M. Mandal, Y. Tsui, W. Rozmus
A label-free cytometry technique based on laser light scattering is presented as an alternative to conventional flow cytometry using fluorescent or magnetic markers. Single-cell light scattering patterns are used as fingerprints for cell identification. Blood cells and neuroblastoma cells have been used as experimental case studies. Various methods including machine learning have been deployed for the analysis of the laser light scattering patterns. Potential applications of this label-free technique will be discussed.
{"title":"Laser Light Scattering-Based Label-Free Cytometry","authors":"Xiaoxuan Liu, Lina Liu, M. Z. Islam, Manisha Gupta, M. Mandal, Y. Tsui, W. Rozmus","doi":"10.1109/PN52152.2021.9597957","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597957","url":null,"abstract":"A label-free cytometry technique based on laser light scattering is presented as an alternative to conventional flow cytometry using fluorescent or magnetic markers. Single-cell light scattering patterns are used as fingerprints for cell identification. Blood cells and neuroblastoma cells have been used as experimental case studies. Various methods including machine learning have been deployed for the analysis of the laser light scattering patterns. Potential applications of this label-free technique will be discussed.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"15 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75821111","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597996
J. Sabarinathan
In this talk, I will present our results on the optomechanics of silicon photonic crystal based suspended membrane and edge-defect structures. We have studied and modeled the dynamic response of these devices, which has enabled us to design novel acoustic and magnetic sensors with very small footprint area. Using different edge defect 2D PC slab configurations we have studied the opto-mechanical coupling interaction both experimentally and via modelling. In these studies, we have observed interesting optical bistability and frequency combing phenomena.
{"title":"Silicon Photonic Crystal Membrane based Optomechanics","authors":"J. Sabarinathan","doi":"10.1109/PN52152.2021.9597996","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597996","url":null,"abstract":"In this talk, I will present our results on the optomechanics of silicon photonic crystal based suspended membrane and edge-defect structures. We have studied and modeled the dynamic response of these devices, which has enabled us to design novel acoustic and magnetic sensors with very small footprint area. Using different edge defect 2D PC slab configurations we have studied the opto-mechanical coupling interaction both experimentally and via modelling. In these studies, we have observed interesting optical bistability and frequency combing phenomena.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"66 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74138837","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597985
L. Daudet
Current large-scale computations, for instance in High Performance Computing or in the training of massive Machine Learning models, often suffer from the “memory bottleneck”, especially when dealing with high-dimensional data. Here, we present a new non-von Neumann photonic hardware, leveraging multiple light scattering. Optical Processing Units can be seamlessly integrated into a variety of hybrid photonics / silicon pipelines implementing state-of-the-art Machine Learning or High Performance Computing algorithms. They offer a credible pathway towards a new generation of large-scale computing, both scalable and sustainable.
{"title":"Leveraging million-scale Non von Neumann computations for accelerated Machine Learning and High Performance Computing","authors":"L. Daudet","doi":"10.1109/PN52152.2021.9597985","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597985","url":null,"abstract":"Current large-scale computations, for instance in High Performance Computing or in the training of massive Machine Learning models, often suffer from the “memory bottleneck”, especially when dealing with high-dimensional data. Here, we present a new non-von Neumann photonic hardware, leveraging multiple light scattering. Optical Processing Units can be seamlessly integrated into a variety of hybrid photonics / silicon pipelines implementing state-of-the-art Machine Learning or High Performance Computing algorithms. They offer a credible pathway towards a new generation of large-scale computing, both scalable and sustainable.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"9 1 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75979551","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597923
A. Ahmed, Aimé Braconnier, Josh Gibbs, J. Burgess
Antireflection coatings (ARCs) provide a powerful method to reduce reflective losses and eliminate spurious reflections that can limit experiments. At Terahertz (THz) frequencies, ARC options remain limited. To address this, we employ a combination of commercially available polymer adhesive tapes and films to create ARCs for THz light, that can be applied on a wide range of substrates. In addition to their ease of application, one coating can be removed from a substrate and a different one can be applied. Both narrow and wide band performance are achieved from different coatings, which can be tuned to a target frequency by altering the thickness of polymer layers. We have experimentally evaluated the efficacy of the layered structures in the bandwidth 0.25-2.25 THz using THz time domain spectroscopy. Taking the optical properties of each layer into account, we can model the response of ARCs in both frequency and time domains. These economic coatings can have vast applications where the attenuation of Fresnel loss or Fabry-Perot effect is desired.
{"title":"Low-cost antireflection coatings for terahertz light employing multilayered polymer films and adhesives","authors":"A. Ahmed, Aimé Braconnier, Josh Gibbs, J. Burgess","doi":"10.1109/PN52152.2021.9597923","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597923","url":null,"abstract":"Antireflection coatings (ARCs) provide a powerful method to reduce reflective losses and eliminate spurious reflections that can limit experiments. At Terahertz (THz) frequencies, ARC options remain limited. To address this, we employ a combination of commercially available polymer adhesive tapes and films to create ARCs for THz light, that can be applied on a wide range of substrates. In addition to their ease of application, one coating can be removed from a substrate and a different one can be applied. Both narrow and wide band performance are achieved from different coatings, which can be tuned to a target frequency by altering the thickness of polymer layers. We have experimentally evaluated the efficacy of the layered structures in the bandwidth 0.25-2.25 THz using THz time domain spectroscopy. Taking the optical properties of each layer into account, we can model the response of ARCs in both frequency and time domains. These economic coatings can have vast applications where the attenuation of Fresnel loss or Fabry-Perot effect is desired.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"10 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82075871","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597928
V. Kocharovsky, V. Kocharovsky, E. Kocharovskaya, Alexey B. Mishin
Numerical analysis of the Maxwell-Bloch equations for a low-Q CW superradiant laser with symmetric Fabry-Perot cavity shows that a strong pumping leads to spontaneous formation of a highly asymmetric half-wavelength grating of polarization and population inversion of active centers which results in a self-consistent generation of counter-propagating waves with different spatial profiles and outgoing intensities.
{"title":"Novel Steady-State Light-Matter Phase: Spontaneous Symmetry Breaking via Formation of an Asymmetric Nonlinear Self-Consistent Grating in a Low-Q CW Superradiant Laser with Symmetric Fabry-Perot Cavity","authors":"V. Kocharovsky, V. Kocharovsky, E. Kocharovskaya, Alexey B. Mishin","doi":"10.1109/PN52152.2021.9597928","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597928","url":null,"abstract":"Numerical analysis of the Maxwell-Bloch equations for a low-Q CW superradiant laser with symmetric Fabry-Perot cavity shows that a strong pumping leads to spontaneous formation of a highly asymmetric half-wavelength grating of polarization and population inversion of active centers which results in a self-consistent generation of counter-propagating waves with different spatial profiles and outgoing intensities.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"52 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81066914","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}
Pub Date : 2021-05-31DOI: 10.1109/PN52152.2021.9597951
Jiaying Lu, M. Vafadar, Songrui Zhao
In this work, we investigated the top-surface light extraction efficiency of 225 nm emitting AlGaN nanowire deep ultraviolet LEDs on Si substrate with a honeycomb lattice.
{"title":"Light Extraction Efficiency of 225 nm Emitting AlGaN Nanowire LEDs with a Honeycomb Lattice","authors":"Jiaying Lu, M. Vafadar, Songrui Zhao","doi":"10.1109/PN52152.2021.9597951","DOIUrl":"https://doi.org/10.1109/PN52152.2021.9597951","url":null,"abstract":"In this work, we investigated the top-surface light extraction efficiency of 225 nm emitting AlGaN nanowire deep ultraviolet LEDs on Si substrate with a honeycomb lattice.","PeriodicalId":6789,"journal":{"name":"2021 Photonics North (PN)","volume":"272 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79945454","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}
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