Microring resonators are pivotal in photonic and quantum technologies. Enhancing their versatility for various applications often involves integrating additional elements to modify their resonant lineshapes. In this regard, Nested Ring Resonators (NRRs) offer a novel approach to generate a variety of lineshapes without the need for supplementary components. The coupled resonant architecture of NRRs can induce phenomena such as Electromagnetically Induced Absorption, Electromagnetically Induced Transparency, Fano resonance, and double Fano resonance. This study comprehensively analyzes the different resonant lineshapes achievable with NRRs, highlighting their broad applicability. We identify the specific conditions required for each resonant phenomenon and closely examine their characteristics. The theoretical insights from our research enable the autonomous design and realization of various resonance lineshapes within an NRR, eliminating the need for additional components while maintaining device compactness for a wide range of practical applications.
{"title":"A comprehensive study of non-Lorentzian resonant lineshapes in nested ring resonators for quantum and photonic applications","authors":"Pragya Mishra , Tushar Gaur , Neha Gupta , Talabattula Srinivas","doi":"10.1016/j.ijleo.2024.172049","DOIUrl":"10.1016/j.ijleo.2024.172049","url":null,"abstract":"<div><div>Microring resonators are pivotal in photonic and quantum technologies. Enhancing their versatility for various applications often involves integrating additional elements to modify their resonant lineshapes. In this regard, Nested Ring Resonators (NRRs) offer a novel approach to generate a variety of lineshapes without the need for supplementary components. The coupled resonant architecture of NRRs can induce phenomena such as Electromagnetically Induced Absorption, Electromagnetically Induced Transparency, Fano resonance, and double Fano resonance. This study comprehensively analyzes the different resonant lineshapes achievable with NRRs, highlighting their broad applicability. We identify the specific conditions required for each resonant phenomenon and closely examine their characteristics. The theoretical insights from our research enable the autonomous design and realization of various resonance lineshapes within an NRR, eliminating the need for additional components while maintaining device compactness for a wide range of practical applications.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"316 ","pages":"Article 172049"},"PeriodicalIF":3.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323194","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2024-09-24DOI: 10.1016/j.ijleo.2024.172051
T. Keerthi Priya, Prasenjit Deb, Anwesha Choudhury
A hybrid structure of fluorine-doped tin oxide (FTO)/titanium dioxide (TiO2)/methylammonium tin triiodide (CH3NH3SnI3)/reduced graphene oxide (RGO) based solar cell has been designed and simulated using SCAPS-1D simulation tool. The three layers of the solar cell have been organized like TiO2 acting as an electron transporting layer (ETL), CH3NH3SnI3 serving as the photon absorption layer, and reduced graphene oxide (RGO) acting as the hole transporting layer (HTL). The thickness of the ETL and HTL layers are maintained at 300 nm each. The absorption layer thickness has been optimized and kept at 450 nm to get enhanced efficiency. The experimental absorption data from the referred articles of the materials are incorporated with the simulation to obtain convincing result. Simulated device parameters, such as efficiency, open-circuit voltage, short-circuit current density, and fill factor have been found to be 19.30 %, 1.070 V, 41.66 mA/cm2, and 43.27 %, respectively at 300 K temperature. Moreover, a study of the absorption layer defect density (109–1017 cm−2) has also been conducted for the device, revealing an almost inverse proportionality with the efficiency of the device. In addition, the device FTO/TiO2/CH3NH3SnI3/RGO has been examined with the various temperature range from 270 K to 400 K. The device, with a high offset band structure and high mobility ETL and HTL layers, shows promising candidate for solar cell applications.
{"title":"Simulation of high efficiency hybrid FTO/TiO2/CH3NH3SnI3/RGO based solar cell using SCAPS-1D","authors":"T. Keerthi Priya, Prasenjit Deb, Anwesha Choudhury","doi":"10.1016/j.ijleo.2024.172051","DOIUrl":"10.1016/j.ijleo.2024.172051","url":null,"abstract":"<div><div>A hybrid structure of fluorine-doped tin oxide (FTO)/titanium dioxide (TiO<sub>2</sub>)/methylammonium tin triiodide (CH<sub>3</sub>NH<sub>3</sub>SnI<sub>3</sub>)/reduced graphene oxide (RGO) based solar cell has been designed and simulated using SCAPS-1D simulation tool. The three layers of the solar cell have been organized like TiO<sub>2</sub> acting as an electron transporting layer (ETL), CH<sub>3</sub>NH<sub>3</sub>SnI<sub>3</sub> serving as the photon absorption layer, and reduced graphene oxide (RGO) acting as the hole transporting layer (HTL). The thickness of the ETL and HTL layers are maintained at 300 nm each. The absorption layer thickness has been optimized and kept at 450 nm to get enhanced efficiency. The experimental absorption data from the referred articles of the materials are incorporated with the simulation to obtain convincing result. Simulated device parameters, such as efficiency, open-circuit voltage, short-circuit current density, and fill factor have been found to be 19.30 %, 1.070 V, 41.66 mA/cm<sup>2</sup>, and 43.27 %, respectively at 300 K temperature. Moreover, a study of the absorption layer defect density (10<sup>9</sup>–10<sup>17</sup> cm<sup>−2</sup>) has also been conducted for the device, revealing an almost inverse proportionality with the efficiency of the device. In addition, the device FTO/TiO<sub>2</sub>/CH<sub>3</sub>NH<sub>3</sub>SnI<sub>3</sub>/RGO has been examined with the various temperature range from 270 K to 400 K. The device, with a high offset band structure and high mobility ETL and HTL layers, shows promising candidate for solar cell applications.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"316 ","pages":"Article 172051"},"PeriodicalIF":3.1,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2024-09-23DOI: 10.1016/j.ijleo.2024.172043
Raha Moradi-Harouni , Mohammad Soroosh , Ali Basem , Hassan A. Kenjrawy , Hocine Ben Salah
{"title":"Corrigendum to “High-sensitive and compact plasmonic temperature sensor based on square-shaped ring resonators” [Optik 311 (2024) 171956]","authors":"Raha Moradi-Harouni , Mohammad Soroosh , Ali Basem , Hassan A. Kenjrawy , Hocine Ben Salah","doi":"10.1016/j.ijleo.2024.172043","DOIUrl":"10.1016/j.ijleo.2024.172043","url":null,"abstract":"","PeriodicalId":19513,"journal":{"name":"Optik","volume":"315 ","pages":"Article 172043"},"PeriodicalIF":3.1,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142428310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2024-09-21DOI: 10.1016/j.ijleo.2024.172048
Shashi Kanta Tripathy , Abhik Gorai , Trupti Mayee Behera , Rowdra Ghatak
Early diagnosis of Non-melanoma skin cancers (NMSCs) is most important for successful treatment of the disease.The detection of NMSCs involves visual inspection or invasive method of detection by skin biopsy. Recently, terahertz spectroscopy has come into limelight for detection of biomarkers in low terahertz (THz) region in between 0.1 – 10 THz which will be in resonance with the biomolecules. This work entails in designing a microscale THz metamaterial absorber for discriminating the attributes between Non-melanoma skin cancerous skin and normal skin. The proposed absorber is composed of space filling curved aluminum layer over a polymide substrate. The absorber culminates its absorbance peak of 99.8 % at 0.503 THz and 99.5 % at 1.076 THz, revealing its dual band trait. Moreover, variation of refractive index of the medium from 1.3 to 1.4 shows shift in absorption peak with a sensitivity of 95.76 GHz/RIU and 100 GHz/RIU for first and second band respectively.
{"title":"A miniaturized dual band terahertz metamaterial based absorber as a biosensor for non-melanoma skin cancer diognostic","authors":"Shashi Kanta Tripathy , Abhik Gorai , Trupti Mayee Behera , Rowdra Ghatak","doi":"10.1016/j.ijleo.2024.172048","DOIUrl":"10.1016/j.ijleo.2024.172048","url":null,"abstract":"<div><div>Early diagnosis of Non-melanoma skin cancers (NMSCs) is most important for successful treatment of the disease.The detection of NMSCs involves visual inspection or invasive method of detection by skin biopsy. Recently, terahertz spectroscopy has come into limelight for detection of biomarkers in low terahertz (THz) region in between 0.1 – 10 THz which will be in resonance with the biomolecules. This work entails in designing a microscale THz metamaterial absorber for discriminating the attributes between Non-melanoma skin cancerous skin and normal skin. The proposed absorber is composed of space filling curved aluminum layer over a polymide substrate. The absorber culminates its absorbance peak of 99.8 % at 0.503 THz and 99.5 % at 1.076 THz, revealing its dual band trait. Moreover, variation of refractive index of the medium from 1.3 to 1.4 shows shift in absorption peak with a sensitivity of 95.76 GHz/RIU and 100 GHz/RIU for first and second band respectively.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"316 ","pages":"Article 172048"},"PeriodicalIF":3.1,"publicationDate":"2024-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142421056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2024-09-20DOI: 10.1016/j.ijleo.2024.172041
Yashaswini P R , Venkateswara Rao Kolli , Geetha L , Gautam Narayan Nirala , Srikanth P. C
A two-dimensional (2D) photonic crystal (PC) based biosensor was developed and studied to detect albumin and urea levels in patients with proteinuria. Rhombic ring resonator structures are built with the help of FDTD (Finite Difference Time Domain). After the fields are computed using the 2D-FDTD approach, the normalized transmission spectra are produced by applying the Fast Fourier Transform (FFT) to them. The full width at half maximum (FWHM), Quality factor (Q-factor), Sensitivity, Figure of Merit (FOM), and Limit of Detection (LOD) are 15,466.5, 110 nm/RIU, 0.12 nm, 1100 RIU−1 and 54.34X10−6 RIU respectively, when the resonant wavelength is 1546 nm. The novelty of this the project lies in combining 2D photonic crystal, innovative rhombic ring resonator design and high-performance parameters. The achieved values are notably high, which is a novel achievement in the field of biosensing. The project aims to contribute to the field of biosensors and provide a potential tool for healthcare professionals to monitor diabetes, proteinuria, kidney function and overall health.
{"title":"Enhanced biosensing with rhombic ring resonator in 2D photonic crystals for proteinuria detection","authors":"Yashaswini P R , Venkateswara Rao Kolli , Geetha L , Gautam Narayan Nirala , Srikanth P. C","doi":"10.1016/j.ijleo.2024.172041","DOIUrl":"10.1016/j.ijleo.2024.172041","url":null,"abstract":"<div><div>A two-dimensional (2D) photonic crystal (PC) based biosensor was developed and studied to detect albumin and urea levels in patients with proteinuria. Rhombic ring resonator structures are built with the help of FDTD (Finite Difference Time Domain). After the fields are computed using the 2D-FDTD approach, the normalized transmission spectra are produced by applying the Fast Fourier Transform (FFT) to them. The full width at half maximum (FWHM), Quality factor (Q-factor), Sensitivity, Figure of Merit (FOM), and Limit of Detection (LOD) are 15,466.5, 110 nm/RIU, 0.12 nm, 1100 <em>RIU</em><sup><em>−</em>1</sup> and 54<em>.</em>34<em>X</em>10<sup><em>−</em>6</sup> RIU respectively, when the resonant wavelength is 1546 nm. The novelty of this the project lies in combining 2D photonic crystal, innovative rhombic ring resonator design and high-performance parameters. The achieved values are notably high, which is a novel achievement in the field of biosensing. The project aims to contribute to the field of biosensors and provide a potential tool for healthcare professionals to monitor diabetes, proteinuria, kidney function and overall health.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"316 ","pages":"Article 172041"},"PeriodicalIF":3.1,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2024-09-19DOI: 10.1016/j.ijleo.2024.172045
Mudasser Husain , Nasir Rahman , Ahmed Azzouz-Rached , Nourreddine Sfina , Muhammad Asad , Akhlaq Hussain , Rashid Ahmad , Rekab-Djabri Hamza , Q. Humayun , Ayesha Samreen , Soufyane Belhachi , Muhammad Uzair , Khamael M. Abualnaja , Ghaida Alosaimi
We employ PF-LAPW (full-potential linear augmented plane-wave) integrated within DFT (density functional theory) for a comprehensive exploration of the structural, optoelectronic, and mechanical properties of novel Tungsten-based oxides double-perovskites compounds Sr2XWO6 (X= Mn, Fe) through the quantum mechanical WIEN2K simulation package. All the computations are done by considering TB-mBJ (Tran-Blaha modified Becke-Johnson potential) and GGA (generalized gradient approximation) as the exchange-correlation potential. The stability and formation of the Sr2XWO6 (X= Mn, Fe) compounds in a cubic structure are validated through structural optimization and the tolerance factor. The analysis of elastic constants and Born-Huang stability criteria predict that the interested oxide double perovskites are ductile, mechanically stable, hard to scratch, anisotropic, and possess a dominant covalent bonding. Both Sr2MnWO6 and Sr2FeWO6 materials are indirect semiconductors with a band gap of 2.05 eV for Sr2FeWO6 and 1.98 eV for Sr2MnWO6 from W-L symmetry points within the 1st Brillouin zone. The small values of band gap and various parameters of optical properties, specifically the broad monotonically increasing absorption spectra, reveal that novel Tungsten-based oxides double-perovskites compounds Sr2XWO6 (X= Mn, Fe) exhibit great potential for optoelectronic properties.
{"title":"Investigating structural, optoelectronic, and mechanical properties of novel Tungsten-based oxides double-perovskites compounds Sr2XWO6 (X= Mn, Fe): A DFT approach","authors":"Mudasser Husain , Nasir Rahman , Ahmed Azzouz-Rached , Nourreddine Sfina , Muhammad Asad , Akhlaq Hussain , Rashid Ahmad , Rekab-Djabri Hamza , Q. Humayun , Ayesha Samreen , Soufyane Belhachi , Muhammad Uzair , Khamael M. Abualnaja , Ghaida Alosaimi","doi":"10.1016/j.ijleo.2024.172045","DOIUrl":"10.1016/j.ijleo.2024.172045","url":null,"abstract":"<div><div>We employ PF-LAPW (full-potential linear augmented plane-wave) integrated within DFT (density functional theory) for a comprehensive exploration of the structural, optoelectronic, and mechanical properties of novel Tungsten-based oxides double-perovskites compounds Sr<sub>2</sub>XWO<sub>6</sub> (X= Mn, Fe) through the quantum mechanical WIEN2K simulation package. All the computations are done by considering TB-mBJ (Tran-Blaha modified Becke-Johnson potential) and GGA (generalized gradient approximation) as the exchange-correlation potential. The stability and formation of the Sr<sub>2</sub>XWO<sub>6</sub> (X= Mn, Fe) compounds in a cubic structure are validated through structural optimization and the tolerance factor. The analysis of elastic constants and Born-Huang stability criteria predict that the interested oxide double perovskites are ductile, mechanically stable, hard to scratch, anisotropic, and possess a dominant covalent bonding. Both Sr<sub>2</sub>MnWO<sub>6</sub> and Sr<sub>2</sub>FeWO<sub>6</sub> materials are indirect semiconductors with a band gap of 2.05 eV for Sr<sub>2</sub>FeWO<sub>6</sub> and 1.98 eV for Sr<sub>2</sub>MnWO<sub>6</sub> from W-L symmetry points within the 1st Brillouin zone. The small values of band gap and various parameters of optical properties, specifically the broad monotonically increasing absorption spectra, reveal that novel Tungsten-based oxides double-perovskites compounds Sr<sub>2</sub>XWO<sub>6</sub> (X= Mn, Fe) exhibit great potential for optoelectronic properties.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"315 ","pages":"Article 172045"},"PeriodicalIF":3.1,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2024-09-19DOI: 10.1016/j.ijleo.2024.172046
Samer H. Zyoud , Samer O. Alalalmeh , Omar E. Hegazi , Jamil H. Alami , Che Azurahanim Che Abdullah , I.S. Yahia , Nageeb Hassan , Akram Ashames , H.Y. Zahran , Samir Haj Bloukh , Moyad Shahwan , Ahed H. Zyoud , Ammar Abdulrahman Jairoun , Naser Qamhieh
This study aims to explore the antimicrobial and photocatalytic efficiencies of pure and Ni-doped ZnO nanostructures produced via Laser-assisted Chemical Bath Synthesis (LACBS) to develop sustainable solutions for water treatment and pathogen control amid the global water crisis exacerbated by climate change and environmental pollution. Utilizing zinc acetate dihydrate and hexamethylenetetramine, the nanostructures were synthesized with Ni doping levels of 0.0 %, 1.5 %, 3.0 %, and 4.5 %, targeting their promising photocatalytic and antimicrobial properties to combat contaminants from pharmaceuticals, agriculture, and industries. Morphological analyses using Scanning Electron Microscopy showed a transition from hexagonal particles to nanoflowers, enhancing photocatalytic activity due to increased surface-to-volume ratio. X-ray Diffraction confirmed the hexagonal wurtzite structure, with variations in peak intensities indicating improved crystallinity with Ni doping. Energy Dispersive X-ray analysis verified the purity and successful incorporation of Ni. Photocatalytic assessments indicated up to 99.24 % degradation of Methylene Orange dye under blue laser irradiation within 60 minutes, correlating with Ni content. Antimicrobial tests demonstrated effective inhibition of pathogens such as Escherichia coli, Staphylococcus aureus, and additional strains like Candida albicans and Klebsiella pneumonia, with increasing zones of inhibition corresponding to higher Ni levels, extending up to 37 mm. The results underscore the dual functionality of ZnO nanostructures for applications in sustainable water treatment and antimicrobial controls, highlighting the need for future studies to examine the impacts of further increased doping concentrations on the material properties and efficacy.
{"title":"Exploration of laser-assisted chemical bath for enhancing synthesis of undoped and nickel-doped zinc oxide and its potential applications in water purification and mitigating antimicrobial resistance","authors":"Samer H. Zyoud , Samer O. Alalalmeh , Omar E. Hegazi , Jamil H. Alami , Che Azurahanim Che Abdullah , I.S. Yahia , Nageeb Hassan , Akram Ashames , H.Y. Zahran , Samir Haj Bloukh , Moyad Shahwan , Ahed H. Zyoud , Ammar Abdulrahman Jairoun , Naser Qamhieh","doi":"10.1016/j.ijleo.2024.172046","DOIUrl":"10.1016/j.ijleo.2024.172046","url":null,"abstract":"<div><div>This study aims to explore the antimicrobial and photocatalytic efficiencies of pure and Ni-doped ZnO nanostructures produced via Laser-assisted Chemical Bath Synthesis (LACBS) to develop sustainable solutions for water treatment and pathogen control amid the global water crisis exacerbated by climate change and environmental pollution. Utilizing zinc acetate dihydrate and hexamethylenetetramine, the nanostructures were synthesized with Ni doping levels of 0.0 %, 1.5 %, 3.0 %, and 4.5 %, targeting their promising photocatalytic and antimicrobial properties to combat contaminants from pharmaceuticals, agriculture, and industries. Morphological analyses using Scanning Electron Microscopy showed a transition from hexagonal particles to nanoflowers, enhancing photocatalytic activity due to increased surface-to-volume ratio. X-ray Diffraction confirmed the hexagonal wurtzite structure, with variations in peak intensities indicating improved crystallinity with Ni doping. Energy Dispersive X-ray analysis verified the purity and successful incorporation of Ni. Photocatalytic assessments indicated up to 99.24 % degradation of Methylene Orange dye under blue laser irradiation within 60 minutes, correlating with Ni content. Antimicrobial tests demonstrated effective inhibition of pathogens such as <em>Escherichia coli</em>, <em>Staphylococcus aureus</em>, and additional strains like <em>Candida albicans</em> and <em>Klebsiella pneumonia</em>, with increasing zones of inhibition corresponding to higher Ni levels, extending up to 37 mm. The results underscore the dual functionality of ZnO nanostructures for applications in sustainable water treatment and antimicrobial controls, highlighting the need for future studies to examine the impacts of further increased doping concentrations on the material properties and efficacy.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"315 ","pages":"Article 172046"},"PeriodicalIF":3.1,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142319233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2024-09-18DOI: 10.1016/j.ijleo.2023.170797
Nikolay A. Kudryashov
A generalized model for propagation pulses with four power nonlinearities is considered. The equation studied is the generalization of some well-known models and allows us to evaluate the influence of various processes on pulse propagation. The three conservation laws of the equation are found. The equation does pass not the Painlevé test and the Cauchy problem cannot be solved by the inverse scattering transform. Analytical solutions of the generalized nonlinear Schrödinger equation are found taking into account the traveling wave reduction. Optical solitons corresponding to the mathematical model are given. Conservative quantities for the bright optical soliton are calculated.
{"title":"Conservation laws of a generalized model for propagation pulses with four power nonlinearities","authors":"Nikolay A. Kudryashov","doi":"10.1016/j.ijleo.2023.170797","DOIUrl":"10.1016/j.ijleo.2023.170797","url":null,"abstract":"<div><div>A generalized model for propagation pulses with four power nonlinearities is considered. The equation studied is the generalization of some well-known models and allows us to evaluate the influence of various processes on pulse propagation. The three conservation laws of the equation are found. The equation does pass not the Painlevé test and the Cauchy problem cannot be solved by the inverse scattering transform. Analytical solutions of the generalized nonlinear Schrödinger equation are found taking into account the traveling wave reduction. Optical solitons corresponding to the mathematical model are given. Conservative quantities for the bright optical soliton are calculated.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"315 ","pages":"Article 170797"},"PeriodicalIF":3.1,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Herein, we report the theoretical investigation on photonic nanojets (PNJs) of substrate-supported single-spherical dielectric microparticles. Conventional and reflective PNJs (CPNJs and RPNJs) are observed in the case of metal and dielectric substrates. The dependence of the maximum electric field intensity enhancement (ηmax) of the CPNJs and RPNJs on the nanogap between the metal substrate and dielectric microsphere, the metal substrate's refractive indices, and the incident light's wavelength is studied. More importantly, the spatial separation between the CPNJs and RPNJs is found to be strongly dependent upon the angle of incidence (θ). A significant improvement in the EFIE is observed for the grazing incidence upon the superposition of CPNJ and RPNJ. The theoretical investigation is also performed by replacing the metal substrate with a dielectric substrate, and the results obtained are reported here for comparison. Finally, this investigation is extended for the dielectric microsphere placed on a thin metal film deposited on a dielectric substrate and studied the role of θ on the characteristic parameters of the CPNJs and RPNJs.
{"title":"Generation of conventional and reflective photonic nanojets and improving intensity enhancement with their superposition","authors":"Anamika Sharma, Arya Kumar Siddharth, Venkata Ramanaiah Dantham","doi":"10.1016/j.ijleo.2024.172047","DOIUrl":"10.1016/j.ijleo.2024.172047","url":null,"abstract":"<div><p>Herein, we report the theoretical investigation on photonic nanojets (PNJs) of substrate-supported single-spherical dielectric microparticles. Conventional and reflective PNJs (CPNJs and RPNJs) are observed in the case of metal and dielectric substrates. The dependence of the maximum electric field intensity enhancement (η<sub>max</sub>) of the CPNJs and RPNJs on the nanogap between the metal substrate and dielectric microsphere, the metal substrate's refractive indices, and the incident light's wavelength is studied. More importantly, the spatial separation between the CPNJs and RPNJs is found to be strongly dependent upon the angle of incidence (θ). A significant improvement in the EFIE is observed for the grazing incidence upon the superposition of CPNJ and RPNJ. The theoretical investigation is also performed by replacing the metal substrate with a dielectric substrate, and the results obtained are reported here for comparison. Finally, this investigation is extended for the dielectric microsphere placed on a thin metal film deposited on a dielectric substrate and studied the role of θ on the characteristic parameters of the CPNJs and RPNJs.</p></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"315 ","pages":"Article 172047"},"PeriodicalIF":3.1,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270325","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2024-09-18DOI: 10.1016/j.ijleo.2024.172044
Abdullah Abdulhameed , Mohd Mahadi Halim , Qasem Ahmed Drmosh , Yaqub Mahnashi , Wan Maryam Wan Ahmad Kamil , Atiqah Nabieha Azmi
Laser-based sensors are taking over their counterparts, fluorescence-based sensors, in the field of bioengineering and space communication due to their high amplification, narrow emission beam, low signal-to-noise ratio, and nonlinearity. In this work, we investigated the chemical growth of ZnO nanorods on different metal surfaces (Au, Pt, Ti, and Al) to serve as random laser mediums. Different analytical techniques were used to investigate the optical, electrical, and morphological properties of the fabricated devices. A lasing threshold of 27.68 mJ/cm² with a spectral width of 2.18 nm centered at 385.06 nm is observed when Ti is used as the growth surface. Al surface produces ZnO nanorods with a lasing threshold of 24.21 mJ/cm² and a spectral width of 1.81 nm. Growing ZnO nanorods on metal surfaces using the chemical bath deposition method paves the way for fabricating different random lasing-based biosensors.
{"title":"Tailoring the morphological, optical, electrical, and random lasing properties of ZnO nanorods synthesized on metal surfaces for biosensor applications","authors":"Abdullah Abdulhameed , Mohd Mahadi Halim , Qasem Ahmed Drmosh , Yaqub Mahnashi , Wan Maryam Wan Ahmad Kamil , Atiqah Nabieha Azmi","doi":"10.1016/j.ijleo.2024.172044","DOIUrl":"10.1016/j.ijleo.2024.172044","url":null,"abstract":"<div><div>Laser-based sensors are taking over their counterparts, fluorescence-based sensors, in the field of bioengineering and space communication due to their high amplification, narrow emission beam, low signal-to-noise ratio, and nonlinearity. In this work, we investigated the chemical growth of ZnO nanorods on different metal surfaces (Au, Pt, Ti, and Al) to serve as random laser mediums. Different analytical techniques were used to investigate the optical, electrical, and morphological properties of the fabricated devices. A lasing threshold of 27.68 mJ/cm² with a spectral width of 2.18 nm centered at 385.06 nm is observed when Ti is used as the growth surface. Al surface produces ZnO nanorods with a lasing threshold of 24.21 mJ/cm² and a spectral width of 1.81 nm. Growing ZnO nanorods on metal surfaces using the chemical bath deposition method paves the way for fabricating different random lasing-based biosensors.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"315 ","pages":"Article 172044"},"PeriodicalIF":3.1,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
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