Realization of ultralow power phase locking by optimizing Q factor of resonant photodetector*

Wang, JinRong; Zhang, Hongyu; Zhao, Zilin; Zheng, Yaohui

doi:10.1088/1674-1056/abbbfb

Cited by 9 publications

(6 citation statements)

References 33 publications

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“…Hf–Ta–Fe magnets exhibit a space group P6 3 /mmc (No.194) hexagonal structure based on the XRD pattern [ 19,25 ] ( Figure b), where Hf/Ta 4f , Fe 6h , and Fe 2a atoms occupy the Wyckoff sites 4f (1/3, 2/3, 0.5629), 6 h (0.1697, 0.3394, 1/4), and 2a (0, 0, 0), respectively, as shown in the inset of Figure 1a. The kagome Fe 6h lattice extracted from the 3 a × 3 a supercell plays an important role during magnetic transition.…”

Section: Resultsmentioning

confidence: 99%

Significant Zero Thermal Expansion Via Enhanced Magnetoelastic Coupling in Kagome Magnets

Wang

Huang

et al. 2022

Advanced Materials

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with neither expansion nor contraction in response to different temperatures is urgently demanded in several fields, particularly in highly advanced modern applications such as telescopes, satellites, and semiconductors. [2,4] Thus far, ZTE materials such as Mn-based antiperovskites, [11,12] R 2 Fe 17 -based magnets, [13,14] LaFe 13−x Si x hydrides, [15] SnO 2 nanowires, [16] PbTiO 3 -Bi(Co,Ti)O 3 ferroelectric solid solutions, [17] and Tb(Co,Fe) 2 magnets [18] with different mechanisms have demonstrated excellent physical properties and unique advantages in practical applications. However, manipulation to obtain excellent NTE and ZTE within a broad temperature range is still challenging and limited for broad applications. Magnetic transition has been regarded as the desired mechanism for manipulating NTE based on a tunable magnetoelastic effect. The optimized NTE, but not yet yielding ZTE in Hf 1−x Ta x Fe 2 (Hf-Ta-Fe) magnets with excellent mechanical properties, [19][20][21][22][23] is obtained owing to the cell volume shrinkage during the ferromagnetic to antiferromagnetic (FM-AFM) transition. The induced weak PTE has exhibited magnetoelastic coupling; however, has not yet garnered considerable attention. Furthermore, Zero-thermal-expansion (ZTE) alloys, as dimensionally stable materials, are urgently required in many fields, particularly in highly advanced modern industries. In this study, high-performance ZTE with a negligible coefficient of thermal expansion a v as small as 2.4 ppm K −1 in a broad temperature range of 85-245 K is discovered in Hf 0.85 Ta 0.15 Fe 2 C 0.01 magnet. It is demonstrated that the addition of trace interstitial atom C into Ta-substituted Hf 0.85 Ta 0.15 Fe 2 exhibits significant capability to tune the normal positive thermal expansion into high-performance ZTE via enhanced magnetoelastic coupling in stabilized ferromagnetic structure. Moreover, direct observation of the magnetic transition between ferromagnetic and triangular antiferromagnetic states via Lorentz transmission electron microscopy, along with corresponding theoretical calculations, further uncovers the manipulation mechanism of ZTE and negative thermal expansion. A convenient and effective method to optimize thermal expansion and achieve ZTE with interstitial C addition may result in broadened applications based on the strong correlation between the magnetic properties and crystal structure.

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Section: Resultsmentioning

confidence: 99%

Significant Zero Thermal Expansion Via Enhanced Magnetoelastic Coupling in Kagome Magnets

Wang

Huang

et al. 2022

Advanced Materials

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“…[32], where the Pound-Drever-Hall technique plays a critical role. [33][34][35] Thus we need not place a beam splitter at the detecting port like Ref. [27] and the collectiondetection efficiency can be improved.…”

Section: Comparison With Power Recycling Weak Measurementmentioning

confidence: 99%

Signal-recycled weak measurement for ultrasensitive velocity estimation*

Fang¹,

Yang²,

Tan³

et al. 2021

Chinese Phys. B

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Weak value amplification has shown its superiority in measurement of small physical effects. Here we introduce a signal-recycled weak-value-based velocity measurement strategy to decrease the attenuation of detected photons during the post-selection. Like the power-recycled scheme, we can improve the number of detected photons and signal-to-noise ratio of velocity by forming a cavity. However, optimal improvements of number of detected photons and signal-to-noise ratio cannot be obtained simultaneously in our signal-recycled scheme owing to the walk-off effect. Furthermore, we find that the reflected light is relatively strong compared with the power-recycled scheme, which may increase the collection-detection efficiency in prospective relevant experiment.

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“…As per the investigation of the absorption position of main ions and function groups contained in commonly used pigment [35,38], a complete summary is shown in Table 3.…”

Section: Typical Ion Absorption Positions Of Pigmentsmentioning

confidence: 99%

“…As per the investigation of the absorption position of main ions and function groups contained in commonly used pigment [35,38], a complete summary is shown in Table 3. According to the absorption positions summarized in Table 3, it can be found that the main cations include Cu 2+ , Fe 2+ , Fe 3+ , and Hg + , whose absorption positions generally appear before the wavelength of 1000 nm.…”

Section: Typical Ion Absorption Positions Of Pigmentsmentioning

confidence: 99%

A Novel Spectral Matching Approach for Pigment: Spectral Subsection Identification Considering Ion Absorption Characteristics

et al. 2020

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Background: Hyperspectral technology has made it possible to perform completely non-invasive investigations on pigment analysis, in particular, on pigment identification. The most commonly used method of pigment identification is to compare the spectral similarity between ones of unknown target and ones in spectral library, which requires a comprehensive and complete spectral library and is based on overall shape of the spectrum. To a certain extent, it may ignore some of the key absorption characteristics of the spectrum. Methods: A novel spectral matching method was proposed based on the spectrum divided into subsections for identification according to the main ion absorption characteristics. Main works: (1) establishing a spectral library suitable for typical pigment identification of painting; (2) discussing the main components, as well as the absorption positions of the ions and functional groups contained in pigments frequently used by artists; (3) presenting a novel spectral matching algorithm carried on spectral subsections for pigment identification; (4) verifying the feasibility and applicability of proposed method by a Chinese painting and a fresco. Conclusions: The proposed method can correctly identify the main pigments or components contained in the mixed area, which is better than the traditional method and more convenient than the unmixing method, except for some limitations in detecting white and black pigments.

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Realization of ultralow power phase locking by optimizing Q factor of resonant photodetector*

Cited by 9 publications

References 33 publications

Significant Zero Thermal Expansion Via Enhanced Magnetoelastic Coupling in Kagome Magnets

Significant Zero Thermal Expansion Via Enhanced Magnetoelastic Coupling in Kagome Magnets

Signal-recycled weak measurement for ultrasensitive velocity estimation*

A Novel Spectral Matching Approach for Pigment: Spectral Subsection Identification Considering Ion Absorption Characteristics

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