• Continuously tuning distributed bragg reflector erbium doped fiber laserContinuously tuning distributed bragg reflector erbium doped fiber laser

    I. INTRODUCTION The Erbium doped fiber (EDF) lasers have been a subject of intensive research because of their potential application in various fields such as communication, spectroscopy, sensing and medicine [1]. In particular, single longitudinal mode, narrow linewidth laser radiation in 1,55-µm region with the capability of being continuously...

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  • Sai sót ở các tài liệu tham khảo tại Việt Nam khi viết về thuyết tương đốiSai sót ở các tài liệu tham khảo tại Việt Nam khi viết về thuyết tương đối

    Tóm tắt: Hầu hết các tài liệu tham khảo tại Việt Nam khi viết về Thuyết tương đối đều khẳng định “Khối lượng là tương đối, giá trị của nó phụ thuộc vào vận tốc”. Trên cơ sở khảo sát các bài viết của Einstein về năng lượng và khối lượng, bài viết này chỉ ra rằng công thức Einstein đã bị hiểu sai lệch ở các tài liệu tham khảo, từ đó dẫn đến quan n...

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  • Influence of shell thickness on thermal stability of bimetallic Al–Pd nanoparticlesInfluence of shell thickness on thermal stability of bimetallic Al–Pd nanoparticles

    Abstract Aluminum-based bimetallic core–shell nanoparticles have shown promising applications in civil and defense industries. This study addresses the thermal stability of aluminum–palladium (Al–Pd) core/shell nanoparticles with a varying shell thickness of 5, 6, and 7 A˚ , respectively. The classic molecular dynamics (MD) simulations are pe...

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  • Interaction model of the interface NASICON with aqueous solutionInteraction model of the interface NASICON with aqueous solution

    I. INTRODUCTION Impedance spectroscopy is a very useful technique for evaluating the electronic characterization of different materials and processes. Giving an accurate model is very important for the evaluation of impedance spectra of interested materials. Nevertheless, it is not easy, for several classes of materials the suitable models are no...

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  • Generation of single frequency light from an optical feedback special laser moduleGeneration of single frequency light from an optical feedback special laser module

    Abstract. Generation of single frequency radiation from a semiconductor laser based on a special laser module (amplifying laser module) is presented. The multi-mode emission with the spectral bandwidth of 100A0 is converted to single mode one with a narrow bandwidth of 2A0 in the presence of external optical feedback. Wavelength tunability of th...

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  • Enhanced sensitivity of surface plasmon resonance sensor based on combination of Au/pedot: PSS nanolayersEnhanced sensitivity of surface plasmon resonance sensor based on combination of Au/pedot: PSS nanolayers

    Abstract This paper simulates an optical sensor utilizing a prism based on surface plasmon resonance (SPR). The simulations combine a layer of Au and an additional layer of different materials: aluminum arsenide (AlAs), poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), zinc oxide (ZnO), and polydimethylsiloxane (PDMS) for SPR ...

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  • Subextension of plurisubharmonic functions with boundary values in weighted pluricomplex energy classesSubextension of plurisubharmonic functions with boundary values in weighted pluricomplex energy classes

    . Introduction Subextension of unbounded plurisubharmonic functions with estimation on total Monge– Ampère mass of subextension was investigated by many authors in the last ten years. Let " ⊂ "! be domains in Cn and let u be a plurisubharmonic function on " (briefly, u ∈ P SH(")). A function !u ∈ P SH("!) is subextension of u if for all z ∈ ",!...

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  • Some characterizations of the class Em(Ω) and applicationsSome characterizations of the class Em(Ω) and applications

    1. Introduction. The complex Monge–Ampère operator has a central role in pluripotential theory and has been extensively studied for many years. This operator was used to obtain many important results of pluripotential theory in Cn, n > 1. An example of such application is the proof of quasi-continuity of plurisubharmonic functions, yielding the ...

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  • Electro-optical interferometric microscopy of periodic and aperiodic ferroelectric structuresElectro-optical interferometric microscopy of periodic and aperiodic ferroelectric structures

    Abstract The ferroelectric domain structures of periodically poled KTiOPO4 and two-dimensional short range ordered poled LiNbO3 crystals are determined non-invasively by interferometric measurements of the electro-optically induced phase retardation. Owing to the sign reversal of the electro-optical coefficients upon domain inversion, a π phase s...

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  • Full determination of single ferroelectric nanocrystal orientation by Pockels electro-Optic microscopyFull determination of single ferroelectric nanocrystal orientation by Pockels electro-Optic microscopy

    We present a nanoscale electro-optic imaging method allowing access to the phase response, which is not amenable to classical second-harmonic generation microscopy. This approach is used to infer the vectorial orientation of single domain ferroelectric nanocrystals, based on polarization-resolved Pockels microscopy. The electro-optic phase respon...

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