Refractive index dispersion of spinel Zn<sub>2</sub>TiO<sub>4</sub> single crystal

Liang, Li; Fan, Ya; Wang, Dejun; Feng, Guanlin; Xu, Duanfu

doi:10.1002/crat.201100068

Cited by 13 publications

(8 citation statements)

References 18 publications

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“…Thus, all the measured properties of Zn 2 TiO 4 , particularly the bandgap and interband transitions process, have been made only on polycrystalline samples 12, 23–25. Recently, we reported the growth of high‐quality Zn 2 TiO 4 crystals by the optical floating zone method 26, 27. In this paper, the optical absorption and polarized Raman spectra of the as‐grown Zn 2 TiO 4 crystal were investigated for the first time, and its optical interband transitions were discussed for further theoretical studies and practical device fabrications.…”

Section: Introductionmentioning

confidence: 99%

Optical interband transitions in Zn₂TiO₄ single crystals

Li¹,

Li²,

Cui³

et al. 2012

Physica Status Solidi (a)

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A high‐quality Zn2TiO4 crystal was used as a prototype for determination of the optical interband transitions by measuring the absorption spectrum of the crystal along the a‐axes at room temperature in the range of 200–1000 nm. Based on the theory of band‐to‐band transitions, the indirect energy gap and the phonon energy were determined as Egi = 3.29 eV and Ep = 0.09 eV, respectively. Also, this phonon was just the vibrational mode at 721 cm−1 in the Raman spectra, which participated in the indirect transitions of the Zn2TiO4.

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Section: Introductionmentioning

confidence: 99%

Optical interband transitions in Zn₂TiO₄ single crystals

Li¹,

Li²,

Cui³

et al. 2012

Physica Status Solidi (a)

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“…The formation of nanocrystals exhibiting a higher refractive index than the original amorphous film together with the films' densification significantly contributed to the regular increase of the refractive indices. Although the films were completely crystallized, the refractive index's final value did not reach the value of 2.1 reported for single-crystalline Zn2TiO4 [23]. Such a disproportion can be attributed to the presence of pores remaining in the films.…”

Section: Tailoring Of Structural and Optical Properties Of Zn2tio4 Filmsmentioning

confidence: 63%

Nanocrystalline Zn2TiO4 films for distributed Bragg's reflectors operating in near infrared region

et al. 2021

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We present a generic sol-gel approach for the preparation of a distributed Bragg reflector (DBR) based on combining nanocrystalline Zn2TiO4 with amorphous SiO2 xerogel films. We determined the effects of the annealing temperatures on the structural and optical properties of nanocrystalline Zn2TiO4 films. The increasing size of nanocrystals and film's density caused a regular growth of the films' refractive indices at 632 nm from the value of 1.837 to 1.960. The acquired data were applied to design the DBR with tailored reflectance at 980 nm and the data predicted by the theoretical model were compared with experimental transmission and reflection spectra. Although the high optical losses caused by the Rayleigh scattering were observed at short wavelengths, the prepared films were fully transparent above 600 nm. The uniform dielectric structure reflecting over 97% of incident light at 980 nm was prepared from eight Bragg's pairs. The normalized spectral bandwidth was about 0.22. We proved the nanocrystalline films exhibiting scattering in UV-VIS spectral region can be used for the construction of the distributed Bragg's reflectors operating in near infrared region. The presented approach can be easily extended to other nanocrystalline films allowing the integration of nanocrystalline luminophores into advanced photonic structures.

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“…Within the transparent range of Mg 4 Ta 2 O 9 crystal, T can be described by the reflectance (R) and α from the crystal wafer by [27] T…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence in wide band gap corundum Mg₄Ta₂O₉ single crystals*

Li¹,

Zheng²,

Hu³

et al. 2020

Chinese Phys. B

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As is well known, the basic intrinsic properties of materials can be significant for their practical applications. In this work, the room-temperature absorption, transmittance, reflectance spectra, and relative photoelectricities parameters of the Mg4Ta2O9 crystals are demonstrated. Meanwhile, the polarized Raman spectra of Mg4Ta2O9 crystals are also described. The room-temperature photoluminescence (PL) and the temperature-dependent PL for Mg4Ta2O9 crystals are obtained. Significantly, we observe a phonon-participated PL process in Mg4Ta2O9.

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Refractive index dispersion of spinel Zn₂TiO₄ single crystal

Cited by 13 publications

References 18 publications

Optical interband transitions in Zn₂TiO₄ single crystals

Optical interband transitions in Zn₂TiO₄ single crystals

Nanocrystalline Zn2TiO4 films for distributed Bragg's reflectors operating in near infrared region

Photoluminescence in wide band gap corundum Mg₄Ta₂O₉ single crystals*

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Refractive index dispersion of spinel Zn2TiO4 single crystal

Cited by 13 publications

References 18 publications

Optical interband transitions in Zn2TiO4 single crystals

Optical interband transitions in Zn2TiO4 single crystals

Nanocrystalline Zn2TiO4 films for distributed Bragg's reflectors operating in near infrared region

Photoluminescence in wide band gap corundum Mg4Ta2O9 single crystals*

Contact Info

Product

Resources

About

Refractive index dispersion of spinel Zn₂TiO₄ single crystal

Optical interband transitions in Zn₂TiO₄ single crystals

Optical interband transitions in Zn₂TiO₄ single crystals

Photoluminescence in wide band gap corundum Mg₄Ta₂O₉ single crystals*