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Science China Chemistry 2025年第01期 163-173页

作者： Chenhui Zhang Chunjun Liang Fulin Sun Ting Zhu Xinghai Huang Yuzhu Guo Xinyu Guo Kunyang Ge Dan Li Fangtian You Zhiqun He Key Laboratory of Luminescence and optical Information Ministry of Education Institute of Optoelectronic TechnologyBeijing Jiaotong University Department of Physics School of Physical Science and Engineering Beijing Jiaotong University

In the field of perovskite solar cells(PSCs), the research on defects in the buried interface has been relatively limited due to its non-exposure; however, this interface significantly impacts the performance enhancement of inverted PSCs. This study employs phenylethylammonium chloride(PEACl) molecules as a buffer layer to modify the buried interface of p-i-n structured PSCs,aiming to enhance the uniformity of self-assembled monolayers(SAMs) and facilitate the uniform nucleation and growth of perovskite films on the substrate. Furthermore, the introduction of the PEACl buffer layer effectively passivates defects at the bottom of the perovskite layer and notably enhances the crystal quality of the perovskite film by mitigating residual stress,thereby reducing nonradiative recombination loss. Following these optimizations, the MA-free PSCs treated with PEACl achieve a power conversion efficiency(PCE) of 24.11%, with significant improvements in storage, thermal stability, and operational stability. Particularly noteworthy is the device's performance in an unencapsulated state, whereas after 1,500 hours of continuous light operation stability testing, it retains 97% of its original efficiency. This study not only enriches the systematic understanding of the characteristics of the buried interface in PSCs but also contributes significantly to advancing the commercial production of perovskite photovoltaic technology.

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Was Polchinski Wrong? Colombeau Distributional Rindler Space-Time with Distributional Levi-CivitàConnection Induced Vacuum Dominance. Unruh Effect Revisited

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Journal of High Energy Physics, Gravitation and Cosmology 2018年第2期4卷 361-440页

作者： Jaykov Foukzon Alexander Potapov Elena Men’kova Center for Mathematical Sciences Israel Institute of Technology Haifa Israel IRE RAS Moscow Russia all-russian research institute for optical and physical measurements Moscow Russia

The vacuum energy density of free scalar quantum field in a Rindler distributional space-time with distributional Levi-Cività connection is considered. It has been widely believed that, except in very extreme situations, the influence of acceleration on quantum fields should amount to just small, sub-dominant contributions. Here we argue that this belief is wrong by showing that in a Rindler distributional background space-time with distributional Levi-Cività connection the vacuum energy of free quantum fields is forced, by the very same background distributional space-time such a Rindler distributional background space-time, to become dominant over any classical energy density component. This semiclassical gravity effect finds its roots in the singular behavior of quantum fields on a Rindler distributional space-times with distributional Levi-Cività connection. In particular we obtain that the vacuum fluctuations have a singular behavior at a Rindler horizon . Therefore sufficiently strongly accelerated observer burns up near the Rindler horizon. Thus Polchinski’s account doesn’t violate the Einstein equivalence principle.

关键词： Vacuum Energy Density Rindler Distributional Space-Time Levi-Cività Connection Semiclassical Gravity Effect Einstein Equivalence Principle Space-Time Einstein Equivalence Principle

Electrodynamics in Noninertial Reference Frames

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Journal of Applied Mathematics and Physics 2016年第4期4卷 806-843页

作者： Stanislav A. Podosenov Jaykov Foukzon Alexander Potapov Elena Men’kova all-russian research institute for optical and physical measurements Moscow Russia Center for Mathematical Sciences Israel Institute of Technology Haifa Israel Kotel’nikov institute of Radioengineering and Electronics Russian Academy of Sciences Moscow Russia

The electrodynamics both in RF with prescribed law of motion and in FR with prescribed structure is considered. Parallel comparison for solutions in “uniformly accelerated” NRF M?ller system and in uniformly accelerated rigid NFR in the space of the constant curvature is carried out. The stationary criterion is formulated. On the basis of this criterion, one of the “eternal physical problems” concerning the field at uniformly accelerated charge motion is considered. The problems of electromagnetic wave spreading, Doppler’s effect and field transformations are discussed.

关键词： Noninertial Reference Frame (NFR) Möller System Space-Time Curvature Anholonomic Transformations Doppler’s Effect Electromagnetic Wave

NIM和VNIIOFI光谱辐射照度双边比对

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计量学报 2016年第4期37卷 347-351页

作者：代彩红吴志峰王彦飞林延东 Boris Khlevnoy 中国计量科学研究院北京100029 all russian research institute for optical and physical measurements Ozemaya 46 Moscow 119361 Russia

2014年12月至2015年1月,中国计量科学研究院（NIM）采用新研制的光谱辐射照度国家基准装置,与全俄光物理测量研究院（VNIIOFI）进行了光谱辐射照度双边比对。比对的波长范围为250-2500nm, NIM和VNIIOFI的光谱辐射照度测量均基于高温黑... 详细信息

2014年12月至2015年1月,中国计量科学研究院（NIM）采用新研制的光谱辐射照度国家基准装置,与全俄光物理测量研究院（VNIIOFI）进行了光谱辐射照度双边比对。比对的波长范围为250-2500nm, NIM和VNIIOFI的光谱辐射照度测量均基于高温黑体辐射源BB3500M,采用高温计测量黑体的温度,溯源至Pt-C和Re-C固定点黑体,并采用WC-C固定点黑体进行了验证,双方在3021K的温度一致性优于70mK。光谱辐射照度双边比对结果表明： 44个比对波长点的光谱辐射照度的平均相对偏差为0.45%。除2000nm波长点的相对偏差为1.1%外,在全波段范围内量值的一致性优于0.90%,均在声称的不确定度范围内。

关键词：计量学光谱辐射照度国际比对高温黑体温度测量

Measurement of bidirectional reflection distribution function on material surface

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Chinese Optics Letters 2009年第1期7卷 88-91页

作者：张伟汪洪源王治乐 research Center for Space optical Engineering Harbin Institute of Technology

Two automatic measurement methods of bidirectional reflection distribution function （BRDF） are presented based on absolute and relative definition. Measurement principle and scheme of the methods are analyzed. A real-time measurement device is developed, the measurement spectral range of which is from ultraviolet to near infrared with 2.4-nm wavelength resolution, and the angular range is 0° - 360° in azimuth angle and 0° - 85° in zenith angle with 0.01° angle resolution. Absolute measurements of BRDF on tinfoil and ceramic tile are performed and the test materials present apparent specular reflection characteristics. The theoretical error in the experiment is about 6.05%. The BRDF measurement results are closely related to the precision of measurement platform, the sensitivity of measurement instrument, and the stability of illuminating light source.

关键词： Distribution functions Fabrics Light Light sources Lighting Probability density function Reflection Time measurement

NH_(3)laser THz emission under optical pumping by“long”(~100μs)CO_(2)laser pulses

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Chinese Optics Letters 2023年第2期21卷 133-137页

作者： Andrey Alekseevich Ionin Igor Olegovich Kinyaevskiy Yuri Mikhailovich Klimachev Andrey Yurievich Kozlov Darya Ivanovna Kormashova Andrey Alexandrovich Kotkov Yury Alekseevich Mityagin Sergey Alexandrovich Savinov Adilya Maratovna Sagitova Dmitry Vasilievich Sinitsyn Maxim Vladimirovich Ionin P.N.Lebedev physical institute of the russian Academy of Sciences Moscow 119991Russia

Terahertz(THz)NH_(3) lasing with optical pumping by electron-beam-sustained discharge“long”(~100μs)CO_(2) laser pulses was *** NH3laser emission pulses and the“long”pulses of the CO_(2) pump laser were simultaneously measured with nanosecond response *** NH3 lasing duration and its delay with respect to the pump pulse were measured for various CO_(2) laser pulse *** the CO_(2) laser pump line 9R(30),three wavelengths of 67.2,83.8,and 88.9μm were *** the CO_(2) laser pump line 9R(16),only a single NH3 laser line with a wavelength of 90.4μm was detected.

关键词： NH3 laser CO_(2)laser terahertz emission nanosecond response time

Analysis and Simulation of Adiabatic Bend Transitions in optical Fibers

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Chinese Physics Letters 2009年第7期26卷 160-163页

作者：姚磊娄淑琴简水生 institute of Lightwave Technology Key Lab of All Optical Network and Advanced Telecommunication Network of EMC Beijing Jiaotong University Beijing 100044

A low-loss criterion for bend transitions in optical fibers is proposed. An optical fiber can be tightly bent with low loss to be adiabatic for the fundamental mode, provided that an approximate upper bound on the rate of change of bend curvature for a given bend curvature is satistied. Two typical adiabatic bend transition paths, the optimum profile and linear protile, are analyzed and studied numerically. A realizable adiabatic transition with an Archimedean spiral profile is introduced for low bend loss in tightly bent optical fibers. Design of the transitions is based on modeling of the propagation and coupling characteristics of the core and cladding modes, which clearly illustrate the physical processes involved.

关键词： sea surface nonliear interaction numerical method

The Solution Cosmological Constant Problem

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Journal of Modern Physics 2019年第7期10卷 729-794页

作者： Jaykov Foukzon Elena Men’kova Alexander Potapov Department of Mathematics Israel Institute of Technology Haifa Israel all-russian research institute for optical and physical Measurement Moscow Russia Kotel’nikov institute of Radioengineering and Electronics Russian Academy of Sciences Moscow Russia

The cosmological constant problem arises because the magnitude of vacuum energy density predicted by the Quantum Field Theory is about 120 orders of magnitude larger then the value implied by cosmological observations of accelerating cosmic expansion. We pointed out that the fractal nature of the quantum space-time with negative Hausdorff-Colombeau dimensions can resolve this tension. The canonical Quantum Field Theory is widely believed to break down at some fundamental high-energy cutoff and therefore the quantum fluctuations in the vacuum can be treated classically seriously only up to this high-energy cutoff. In this paper we argue that the Quantum Field Theory in fractal space-time with negative Hausdorff-Colombeau dimensions gives high-energy cutoff on natural way. We argue that there exists hidden physical mechanism which cancels divergences in canonical QED4, QCD4, Higher-Derivative-Quantum gravity, etc. In fact we argue that corresponding supermassive Pauli-Villars ghost fields really exist. It means that there exists the ghost-driven acceleration of the universe hidden in cosmological constant. In order to obtain the desired physical result we apply the canonical Pauli-Villars regularization up to Λ*. This would fit in the observed value of the dark energy needed to explain the accelerated expansion of the universe if we choose highly symmetric masses distribution between standard matter and ghost matter below the scale Λ*, i.e., The small value of the cosmological constant is explained by tiny violation of the symmetry between standard matter and ghost matter. Dark matter nature is also explained using a common origin of the dark energy and dark matter phenomena.

关键词： Cosmological Constant Problem Quantum Field Theory Vacuum Energy Density Quantum Space-Time Hausdorff-Colombeau Dimension Quantum Fluctuations High-Energy Cutoff Canonical Pauli-Villars Regularization Universe

Effect of structural parameters of Gaussian repaired pit on light intensity distribution inside KH_2PO_4 crystal

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Chinese Physics B 2014年第8期23卷 540-547页

作者：肖勇陈明君程健廖威王海军李明全 Center for Precision Engineering Harbin Institute of Technology Chengdu Fine optical Engineering research Center

KH2PO4 （KDP） crystal with excellent optical properties is a very important element of inertial confinement fusion （ICF） device. However, KDP crystal surface micro-defects severely reduce the crystal laser damage threshold, affecting the crystal service life. In this paper, Gaussian repaired pit is used to replace the crystal surface micro-defects, in order to improve the laser damage resistance of the KDP crystal with surface micro-defects. At first, the physical model of Gaussian repaired pit is built by Fourier model method, and the accuracy of the method is analyzed. It is found that the calculation error can be reduced by increasing the product of the width-period ratio and the truncation constant of the repaired pit. The calculation results about the physical model of Gaussian repaired pit show that the light intensity distribution within the crystal is symmetrical, and there are evidently enhanced light intensity regions in the crystal. Meanwhile, the maximum relative intensity inside the KDP crystal decreases gradually with the increase of the width of the Gaussian repaired pit. Secondly, the Gaussian repaired pits with different widths and the same depth of 20 μm are processed by micro-milling. Their surfaces are very smooth and present the ductile cutting state under the microscope. Finally, the laser damage threshold of the Gaussian repaired pits on the surface of the KDP crystal sample is measured by a 3 ω, 6-ns laser. The results showthat the maximum threshold of the Gaussian repaired pits is 3.12 J/cm2, which is 60% higher than the threshold of initial damage point, and the laser damage threshold increases with the increase of the width of the Gaussian repaired pit.

关键词： KH2PO4 Gaussian repaired pit Fourier modal method laser damage threshold

Consistency of intensity ratio between spectral lines with similar self-absorption characteristics during ungated laser induced breakdown spectroscopy measurements

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Plasma Science and Technology 2019年第3期21卷 77-83页

作者： Jung-Hwan IN Youngmin MOON Jang-Hee CHOI Sungho JEONG optical Lens research Center Korea Photonics Technology Institute School of Mechanical Engineering Gwangju Institute of Science and Technology

This work reports that the intensity ratio of spectral lines having similar self-absorption characteristics during laser induced breakdown spectroscopy(LIBS) analysis can become nearly constant over a wide range of irradiation conditions if the intensities are integrated over a sufficiently long time. It is shown that the plasma temperature and intensity ratio of these spectral lines have temporal similarity. The spectral lines with similar self-absorption properties may be selected to improve the accuracy and consistency of LIBS analysis results under an environment with fluctuating measurement conditions.

关键词： laser induced breakdown spectroscopy intensity ratio self-absorption characteristics CIGS solar cell