High Homogeneity of Magnesium Doped LiNbO3 Crystals Grown by Bridgman Method

Hou, Yudong; Tian, Tian; Wang, Menghui; Shen, Hui; Ding, Zhiying; Zhang, Yan; Xu, Jing

doi:10.3390/cryst10020071

Cited by 10 publications

(9 citation statements)

References 45 publications

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“…[35,[37][38][39][40] When doped with Mg ions, which are typical optical-damage-resistant impurities for the LN, the Nb antisites are substituted by Mg 2+ . This suppresses the formation of bipolarons, [41,42] leading to a reduced amount of photocarriers. Figure 1c,d presents the currentvoltage behaviors of the CLN and LN:Mg PDs with (green line) and without (black line) 532 nm laser illumination.…”

Section: Resultsmentioning

confidence: 99%

Fast Lithium Niobate Photodetector

Jin,

Wang,

et al. 2023

Laser & Photonics Reviews

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Despite various successes in lithium niobate (LN) integrated photonic devices (e.g., light sources, waveguides, modulators, etc.), LN photodetectors (PD) that converts light into electrical signals have received less research attention. Here, fast LN PDs are demonstrated. Defect energy states are used within the forbidden band of the LN as electron donor centers to generate free carriers in the conduction band under optical excitation in the visible range. Compared with previous pyroelectric LN PDs whose response speeds are normally limited to the order of 100 Hz, these LN PDs show faster responses up to 10 kHz. The dependences of the PDs' performances on the electrode gap, external driving voltage, illumination power, and impurity dopants are also studied. This work provides a step toward high‐performance LN PDs for constructing monolithic full‐functional integrated LN photonic chips.

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Section: Resultsmentioning

confidence: 99%

Fast Lithium Niobate Photodetector

Jin,

Wang,

et al. 2023

Laser & Photonics Reviews

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“…By annealing in air (1500 °C, 10 h), the color centers can be removed in this work. It is worth mentioning that annealing after crystal growth is determined to be a significant way to remove color centers produced from point defects of lattice or the atmospheric contamination, and crystal growth methods such as OFZ, VB, [ 26 ] and EFG method. [ 20 ] Above crystal growth methods are generally attributable to melt method, that is, the formation of crystal surface was caused by the temperature difference of solid–liquid interface, color centers, or inclusions easily introduced.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, thermal annealing treatment is also an effective approach that eliminates internal stress, recrystallizes and improves the uniformity in a grown crystal. [ 20,26,27 ]…”

Section: Methodsmentioning

confidence: 99%

Single Crystal Preparation and Luminescent Properties of Lu₂O₃:Eu Scintillator by Vertical Bridgman Method

Zheng

Liu

et al. 2021

Crystal Research and Technology

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Europium‐doped lutetium oxide (Lu2O3:Eu) single crystal is grown by vertical Bridgman method for the first time. Correlated measurements of X‐ray diffraction, X‐ray fluorescence spectra, optical transmittance, photoluminescence excitation, photoluminescence (PL), PL decay, and X‐ray excited luminescence (XEL) spectra are performed. The transmittance of about 80% above 300 nm indicates that the crystal is of good optical quality. By measuring actual Eu3+ concentration, the effective segregation coefficient of Eu3+ in the Lu2O3:Eu crystal is calculated to be 0.75. In the PL spectrum, the dominant emission peaks at 612 and 630 nm originate from the 5D0→7F2 transitions of Eu3+ in C2 site. It is worth mentioning that several emission peaks between 575 and 605 nm mainly ascribe to the transitions of different 5D0 levels to the split 7F1 levels of Eu(C2) or Eu(C3i). PL decay spectra indicate the decay time of 612 nm emission can be determined about 1.0 ms. The decay curve of 582.6 nm emission can be fitted into triple components, and the 5.3 and 1.4 ms components are attributed to Eu3+(C3i) and Eu3+(C2), respectively. The XEL strongest emission of Lu2O3:Eu sample is around 612 nm with a bright red luminescence that matches silicon photodetectors sensitivity.

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“…(2) | = 28 (1064 nm) 92 |χ 33 (2) | = 11 (1064 nm) 92 LiNbO 3 λ > 320 93 2.8−2.2 (320−2000 nm) 94,95 |χ 22…”

Section: Znomentioning

confidence: 99%

Nonlinear Dielectric Nanoantennas and Metasurfaces: Frequency Conversion and Wavefront Control

Grinblat

2021

ACS Photonics

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High-index dielectric nanostructures can support optical resonances of electric and magnetic character with ultralow linear absorption. In contrast to plasmonics, they can be engineered to confine electromagnetic fields inside the resonator, amplifying intrinsic nonlinearities of the dielectric. In this Review I examine the ability of dielectric nanoantennas and metasurfaces for efficient harmonic generation and wave-mixing processes, as well as nonlinear wavefront manipulation of the incident and radiated light. A detailed comparison is made between the many nanoscopic dielectric configurations reported in the literature, evaluating the influence of the material, crystal symmetry, structure geometry, and the different resonances involved (electric and magnetic Mie modes, Fano resonances, and quasi-nonradiative states, including anapoles and quasi-bound states in the continuum). The nonlinear performance of the nanosystems is analyzed, with emphasis on frequency conversion efficiency and emission directionality control, also discussing recent advances in nonlinear imaging, nonlinear holography, and all-optical switching. The role of topology in nonlinear nanophotonics is reviewed in the end, and potential future directions in the field are laid out.

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High Homogeneity of Magnesium Doped LiNbO3 Crystals Grown by Bridgman Method

Cited by 10 publications

References 45 publications

Fast Lithium Niobate Photodetector

Fast Lithium Niobate Photodetector

Single Crystal Preparation and Luminescent Properties of Lu₂O₃:Eu Scintillator by Vertical Bridgman Method

Nonlinear Dielectric Nanoantennas and Metasurfaces: Frequency Conversion and Wavefront Control

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High Homogeneity of Magnesium Doped LiNbO3 Crystals Grown by Bridgman Method

Cited by 10 publications

References 45 publications

Fast Lithium Niobate Photodetector

Fast Lithium Niobate Photodetector

Single Crystal Preparation and Luminescent Properties of Lu2O3:Eu Scintillator by Vertical Bridgman Method

Nonlinear Dielectric Nanoantennas and Metasurfaces: Frequency Conversion and Wavefront Control

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Single Crystal Preparation and Luminescent Properties of Lu₂O₃:Eu Scintillator by Vertical Bridgman Method