G. Bolognini, L. Rossi, F. Bastianini, F. Falcetelli, R. Di Sante, P. Bocheński
Two innovative optical fiber cable layouts designed to improve strain measurement accuracy for Brillouin Optical Time Domain Analysis (BOTDA) sensors through improved strain transfer efficiency are presented and discussed. Swept Wavelength Interferometry (SWI) is used to experimentally evaluate their performance alongside analytical models and numerical simulation through Finite Element Method (FEM). The results show good agreement between the different methods and show that the second sensing cable design presents good features to minimize the mismatch between measured and actual strain. Finally, the strain response of both strain and temperature sensing cables of this design are evaluated, showing that their difference in response is reliable enough to allow temperature compensation.
{"title":"Optical characterization of strain sensing cables for Brillouin optical time domain analysis","authors":"G. Bolognini, L. Rossi, F. Bastianini, F. Falcetelli, R. Di Sante, P. Bocheński","doi":"10.1051/jeos/2022007","DOIUrl":"https://doi.org/10.1051/jeos/2022007","url":null,"abstract":"Two innovative optical fiber cable layouts designed to improve strain measurement accuracy for Brillouin Optical Time Domain Analysis (BOTDA) sensors through improved strain transfer efficiency are presented and discussed. Swept Wavelength Interferometry (SWI) is used to experimentally evaluate their performance alongside analytical models and numerical simulation through Finite Element Method (FEM). The results show good agreement between the different methods and show that the second sensing cable design presents good features to minimize the mismatch between measured and actual strain. Finally, the strain response of both strain and temperature sensing cables of this design are evaluated, showing that their difference in response is reliable enough to allow temperature compensation.","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46748103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
The objective of this study is to investigate miscellaneous wave structures for perturbed Fokas–Lenells equation (FLE) with cubic-quartic dispersion in polarization-preserving fibers. Based on the improved projective Riccati equations method, various types of soliton solutions such as bright soliton, combo dark–bright soliton, singular soliton and combo singular soliton are constructed. Additionally, a set of periodic singular waves are also retrieved. The dynamical behaviors of some obtained solutions are depicted to provide a key to understanding the physics of the model. The modulation instability of the FLE is reported by employing the linear stability analysis which shows that all solutions are stable.
{"title":"Cubic–quartic optical soliton perturbation and modulation stability analysis in polarization-controlled fibers for Fokas-Lenells equation","authors":"K. Al-Ghafri, E. Krishnan, A. Biswas","doi":"10.1051/jeos/2022008","DOIUrl":"https://doi.org/10.1051/jeos/2022008","url":null,"abstract":"The objective of this study is to investigate miscellaneous wave structures for perturbed Fokas–Lenells equation (FLE) with cubic-quartic dispersion in polarization-preserving fibers. Based on the improved projective Riccati equations method, various types of soliton solutions such as bright soliton, combo dark–bright soliton, singular soliton and combo singular soliton are constructed. Additionally, a set of periodic singular waves are also retrieved. The dynamical behaviors of some obtained solutions are depicted to provide a key to understanding the physics of the model. The modulation instability of the FLE is reported by employing the linear stability analysis which shows that all solutions are stable.","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44557526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Karla Roszeitis, M. Sūdžius, A. Palatnik, Rebekka Koch, Jan Carl Budich, K. Leo
For the investigation of non-Hermitian effects and physics under parity-time (PT) symmetry, photonic systems are ideal model systems for both experimental and theoretical research. We investigate a fundamental building block of a potential photonic device, consisting of coupled organic microcavities. The coupled system contains cavities with gain and loss and respects parity-time symmetry, leading to non-Hermitian terms in the corresponding Hamiltonian. Experimentally, two coupled cavities are realized and driven optically using pulsed laser excitation up to the lasing regime. We show that above the lasing threshold, when coherence evolves, the coupled-cavity system starts to operate asymmetrically, generating more light on one side of the device, being characteristic of non-Hermitian PT-symmetric systems. Calculations and simulations on a Su-Schrieffer-Heeger (SSH) chain composed of these PT-symmetric unit cells show the emergence of non-trivial topological features.
{"title":"Coherence onset in PT-symmetric organic microcavities: towards directional propagation of light","authors":"Karla Roszeitis, M. Sūdžius, A. Palatnik, Rebekka Koch, Jan Carl Budich, K. Leo","doi":"10.1051/jeos/2022006","DOIUrl":"https://doi.org/10.1051/jeos/2022006","url":null,"abstract":"For the investigation of non-Hermitian effects and physics under parity-time (PT) symmetry, photonic systems are ideal model systems for both experimental and theoretical research. We investigate a fundamental building block of a potential photonic device, consisting of coupled organic microcavities. The coupled system contains cavities with gain and loss and respects parity-time symmetry, leading to non-Hermitian terms in the corresponding Hamiltonian. Experimentally, two coupled cavities are realized and driven optically using pulsed laser excitation up to the lasing regime. We show that above the lasing threshold, when coherence evolves, the coupled-cavity system starts to operate asymmetrically, generating more light on one side of the device, being characteristic of non-Hermitian PT-symmetric systems. Calculations and simulations on a Su-Schrieffer-Heeger (SSH) chain composed of these PT-symmetric unit cells show the emergence of non-trivial topological features.","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42973461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
A new pump-seeded, short-cavity Brillouin ring laser source layout intended for Brillouin sensing applications is showcased, showing increased high maximum output (1.5 mW), a strong linewidth narrowing effect (producing light with a linewidth of 10 kHz) and limited RIN (~-145 dB/Hz), providing an ultranarrow, highly stable BRL source that can also be employed as a pump-probe source for BOTDA applications.
{"title":"Study of injection-locked stabilized, short cavity Brillouin ring laser source design for fiber sensing applications","authors":"G. Bolognini, F. Bastianini, L. Rossi","doi":"10.1051/jeos/2022005","DOIUrl":"https://doi.org/10.1051/jeos/2022005","url":null,"abstract":"A new pump-seeded, short-cavity Brillouin ring laser source layout intended for Brillouin sensing applications is showcased, showing increased high maximum output (1.5 mW), a strong linewidth narrowing effect (producing light with a linewidth of 10 kHz) and limited RIN (~-145 dB/Hz), providing an ultranarrow, highly stable BRL source that can also be employed as a pump-probe source for BOTDA applications.","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42880605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
The classic equation for decomposing the wavefront aberrations of axis-symmetrical optical systems has the form W(h₀,ρ,Φ)=ΣΣΣC(2j+m)(2p+m)m.(h₀)Λ(2j+m). (ρ)Λ(2p+m).(cosΦ)Λm, where j, p and m are non-negative integers, ρ and Φ are the polar coordinates of the pupil, and h₀ is the object height. However, one non-zero component of the primary aberrations (i.e., C133h₀ρ³(cosΦ)³) is missing from this equation when the image plane is not the Gaussian image plane. This implies that the equation is a sufficient condition only, rather than a necessary and sufficient condition, since it cannot guarantee that all of the components of the aberrations can be found. Accordingly, this letter presents a new method for determining all the components of aberrations of any order. The results show that three and five components of the secondary and tertiary aberrations, respectively, are missing in the existing literature.
{"title":"It is a sufficient condition only, not a necessary and sufficient condition, for decomposing wavefront aberrations","authors":"P. Lin","doi":"10.1051/jeos/2022004","DOIUrl":"https://doi.org/10.1051/jeos/2022004","url":null,"abstract":"The classic equation for decomposing the wavefront aberrations of axis-symmetrical optical systems has the form W(h₀,ρ,Φ)=ΣΣΣC(2j+m)(2p+m)m.(h₀)Λ(2j+m). (ρ)Λ(2p+m).(cosΦ)Λm, where j, p and m are non-negative integers, ρ and Φ are the polar coordinates of the pupil, and h₀ is the object height. However, one non-zero component of the primary aberrations (i.e., C133h₀ρ³(cosΦ)³) is missing from this equation when the image plane is not the Gaussian image plane. This implies that the equation is a sufficient condition only, rather than a necessary and sufficient condition, since it cannot guarantee that all of the components of the aberrations can be found. Accordingly, this letter presents a new method for determining all the components of aberrations of any order. The results show that three and five components of the secondary and tertiary aberrations, respectively, are missing in the existing literature.\u0000","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44885187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
H. Müller, T. Waak, U. Birnbaum, G. Böhm, T. Arnold
To meet the increasing market demand for optical components, Plasma Jet Machining (PJM) of Borosilicate Crown Glass (BCG), which can be an alternative to Fused Silica, is presented. Surface figure error correction was performed by applying reactive plasma jet etching, where a fluorine containing microwave driven plasma jet is employed to reduce the figure error in a deterministic dwell-time controlled dry etching process. However, some of the glass constituents of BCG cause the formation of a residual layer during surface treatment which influences the local material removal. By heating the substrate to about Ts= 325°C to 350°C during processing, the etching behavior can clearly be improved. Geometric conditions of the optical element nevertheless lead to a characteristic temperature distribution on the substrate surface, which requires an adjustment of the local dwell times in order to obtain the required material removal. Furthermore, the resulting local surface roughness is also influenced by the surface temperature distribution. It is shown that figure error can be significantly reduced by taking the local temperature distribution and resulting local etching rates into account. A subsequent polishing step smoothens roughness features occurring during etching to provide optical surface quality.
{"title":"Atmospheric Plasma Jet processing for figure error correction of an optical element made from S-BSL7","authors":"H. Müller, T. Waak, U. Birnbaum, G. Böhm, T. Arnold","doi":"10.1051/jeos/2022003","DOIUrl":"https://doi.org/10.1051/jeos/2022003","url":null,"abstract":"To meet the increasing market demand for optical components, Plasma Jet Machining (PJM) of Borosilicate Crown Glass (BCG), which can be an alternative to Fused Silica, is presented. Surface figure error correction was performed by applying reactive plasma jet etching, where a fluorine containing microwave driven plasma jet is employed to reduce the figure error in a deterministic dwell-time controlled dry etching process. However, some of the glass constituents of BCG cause the formation of a residual layer during surface treatment which influences the local material removal. By heating the substrate to about Ts= 325°C to 350°C during processing, the etching behavior can clearly be improved. Geometric conditions of the optical element nevertheless lead to a characteristic temperature distribution on the substrate surface, which requires an adjustment of the local dwell times in order to obtain the required material removal. Furthermore, the resulting local surface roughness is also influenced by the surface temperature distribution. It is shown that figure error can be significantly reduced by taking the local temperature distribution and resulting local etching rates into account. A subsequent polishing step smoothens roughness features occurring during etching to provide optical surface quality.","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43443479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
L. Moscardi, S. Varas, A. Chiasera, F. Scotognella, M. Guizzardi
Photonic crystals can integrate plasmonic materials such as indium tin oxide in their structure. Exploiting indium tin oxide plasmonic properties, it is possible to tune the photonic band gap of the photonic crystal upon the application of an external stimuli. In this work, we have fabricated a one-dimensional multilayer photonic crystal alternating indium tin oxide and titanium dioxide via radiofrequency sputtering and we have triggered its optical response with ultrafast pump-probe spectroscopy. Upon photoexcitation, we observe a change in the refractive index of indium tin oxide. Such an effect has been used to create a photonic crystal that changes its photonic bandgap in an ultrafast time scale. All optical modulation in the visible region, that can be tuned by designing the photonic crystal, has been demonstrated.
{"title":"Ultrafast broadband optical modulation in indium tin oxide/titanium dioxide 1D photonic crystal","authors":"L. Moscardi, S. Varas, A. Chiasera, F. Scotognella, M. Guizzardi","doi":"10.1051/jeos/2022009","DOIUrl":"https://doi.org/10.1051/jeos/2022009","url":null,"abstract":"Photonic crystals can integrate plasmonic materials such as indium tin oxide in their structure. Exploiting indium tin oxide plasmonic properties, it is possible to tune the photonic band gap of the photonic crystal upon the application of an external stimuli. In this work, we have fabricated a one-dimensional multilayer photonic crystal alternating indium tin oxide and titanium dioxide via radiofrequency sputtering and we have triggered its optical response with ultrafast pump-probe spectroscopy. Upon photoexcitation, we observe a change in the refractive index of indium tin oxide. Such an effect has been used to create a photonic crystal that changes its photonic bandgap in an ultrafast time scale. All optical modulation in the visible region, that can be tuned by designing the photonic crystal, has been demonstrated.","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43702116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
Daewook Kim, Xiaolong Ke, W. Pullen, Tianyi Wang, Hee-June Choi, V. Negi, Lei Huang, M. Idir
High precision astronomical optics are manufactured through deterministic computer controlled optical surfacing processes, such as subaperture small tool polishing, magnetorheological finishing, bonnet tool polishing, and ion beam figuring. Due to the small tool size and the corresponding tool influence function, large optics fabrication is a highly time-consuming process. The framework of multiplexed figuring runs for the simultaneous use of two or more tools is presented. This multiplexing process increases the manufacturing efficiency and reduces the overall cost using parallelized subaperture tools.
{"title":"Generalized Large Optics Fabrication Multiplexing","authors":"Daewook Kim, Xiaolong Ke, W. Pullen, Tianyi Wang, Hee-June Choi, V. Negi, Lei Huang, M. Idir","doi":"10.1051/jeos/2022002","DOIUrl":"https://doi.org/10.1051/jeos/2022002","url":null,"abstract":"High precision astronomical optics are manufactured through deterministic computer controlled optical surfacing processes, such as subaperture small tool polishing, magnetorheological finishing, bonnet tool polishing, and ion beam figuring. Due to the small tool size and the corresponding tool influence function, large optics fabrication is a highly time-consuming process. The framework of multiplexed figuring runs for the simultaneous use of two or more tools is presented. This multiplexing process increases the manufacturing efficiency and reduces the overall cost using parallelized subaperture tools.","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45128925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
. Dispersion of light waves is well known, but the subject deserves some comments. Certain classical equations do not fully respect causality; as an example, group velocity v g is usually given as the fi rst derivative of the angular frequency x with respect to the angular spatial frequency k m (or wavenumber) in the medium, whereas it is k m that depends on x . This paper also emphasizes the use of phase index n and group index n g , as inverse of their respective velocities, normalized to 1/ c , the inverse of free-space light velocity. This clari fi es the understanding of dispersion equations: group dispersion parameter D is related to the fi rst derivative of n g with respect to wavelength k , whilst group velocity dispersion GVD is also related to the fi rst derivative of n g , but now with respect to angular frequency x . One notices that the term second order dispersion does not have the same meaning with k , or with x . In addition, two original and amusing geometrical constructions are proposed; they simply derive group index n g from phase index n with a tangent , which helps to visualize their relationship. This applies to bulk materials, as well as to optical fi bers and waveguides, and this can be extended to birefringence and polarization mode dispersion in polarization-maintaining fi bers or birefringent waveguides.
{"title":"Comments about Dispersion of Light Waves","authors":"H. Lefèvre","doi":"10.1051/jeos/2022001","DOIUrl":"https://doi.org/10.1051/jeos/2022001","url":null,"abstract":". Dispersion of light waves is well known, but the subject deserves some comments. Certain classical equations do not fully respect causality; as an example, group velocity v g is usually given as the fi rst derivative of the angular frequency x with respect to the angular spatial frequency k m (or wavenumber) in the medium, whereas it is k m that depends on x . This paper also emphasizes the use of phase index n and group index n g , as inverse of their respective velocities, normalized to 1/ c , the inverse of free-space light velocity. This clari fi es the understanding of dispersion equations: group dispersion parameter D is related to the fi rst derivative of n g with respect to wavelength k , whilst group velocity dispersion GVD is also related to the fi rst derivative of n g , but now with respect to angular frequency x . One notices that the term second order dispersion does not have the same meaning with k , or with x . In addition, two original and amusing geometrical constructions are proposed; they simply derive group index n g from phase index n with a tangent , which helps to visualize their relationship. This applies to bulk materials, as well as to optical fi bers and waveguides, and this can be extended to birefringence and polarization mode dispersion in polarization-maintaining fi bers or birefringent waveguides.","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46867414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
A precise spectrophotometric method to determine the refractive index of a semitransparent metallic thin film is presented. This method relies on interference enhancement of the measured spectra, employing an opaque substrate with a dielectric spacer layer beneath the absorbing layer of interest to create interference fringes.The resulting spectral oscillations of the stack are highly sensitive to the properties of the top absorbing layer, allowing precise determination of the refractive index via fitting. The performance of this method is verified using simulations in comparison to the typical method of depositing the absorbing thin film directly onto a transparent substrate. An experimental demonstration is made for titanium thin films over the visible range (370-835 nm). The refractive index of these films is extracted from experimental data using a combination of the Modified Drude and Forouhi-Bloomer models. This method showed high repeatability and precision, and is verified for Ti films between 6-70 nm thickness.
{"title":"Precise spectrophotometric method for semitransparent metallic thin-film index determination using interference enhancement","authors":"Riley Shurvinton, Fabien Lemarchand, Antonin Moreau, Julien Lumeau","doi":"10.1186/s41476-021-00172-9","DOIUrl":"10.1186/s41476-021-00172-9","url":null,"abstract":"<div><p>A precise spectrophotometric method to determine the refractive index of a semitransparent metallic thin film is presented. This method relies on interference enhancement of the measured spectra, employing an opaque substrate with a dielectric spacer layer beneath the absorbing layer of interest to create interference fringes.The resulting spectral oscillations of the stack are highly sensitive to the properties of the top absorbing layer, allowing precise determination of the refractive index via fitting. The performance of this method is verified using simulations in comparison to the typical method of depositing the absorbing thin film directly onto a transparent substrate. An experimental demonstration is made for titanium thin films over the visible range (370-835 nm). The refractive index of these films is extracted from experimental data using a combination of the Modified Drude and Forouhi-Bloomer models. This method showed high repeatability and precision, and is verified for Ti films between 6-70 nm thickness.</p></div>","PeriodicalId":674,"journal":{"name":"Journal of the European Optical Society-Rapid Publications","volume":"17 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://jeos.springeropen.com/counter/pdf/10.1186/s41476-021-00172-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41652753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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