Optical and transport properties of chromium-doped CdSe and CdS0.67Se0.33 crystals

Kasiyan, V.; Dashevsky, Z.; Shneck, R.; Towe, E.

doi:10.1016/j.jcrysgro.2005.12.118

Cited by 8 publications

(16 citation statements)

References 17 publications

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“…In spite of these difficulties, TM:II-VI single crystals with good laser characteristics were reported by several groups. More details on TM doped II-VI crystal fabrication are available in the following publications: Chromium doped-ZnSe (PVT [17,18]), CdSe (PVT [19], gradient freezing [20]), CdS 1−x Se x (PVT [19,21]), CdTe (Bridgman [22]), Cd 1−x Mn x Te (Bridgman [22,23]); Iron dopedZnSe (PVT [17]), CdSe (Bridgman [24]), CdTe (Bridgman [24]), Cd 1−x Mn x Te (Bridgman [12]). …”

Section: Crystal Growthmentioning

confidence: 99%

Progress in Cr²⁺and Fe²⁺doped mid‐IR laser materials

Mirov

Fedorov

Moskalev

et al. 2010

Laser & Photonics Reviews

210

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Recent progress in chromium and iron doped II-VI semiconductor materials makes them the laser sources of choice when one needs a compact system with tunability over 1.9-5.1 μm. Output powers exceeding 10 W and efficiency up to 70% were demonstrated in several Cr doped semiconductors. The unique combination of technological (low-cost ceramic material) and spectroscopic characteristics makes these materials ideal candidates for mid-IR tunable laser systems. This article reviews transition metal doped II-VI materials and recent progress in Cr-and Fe-doped solid-state mid-IR lasers.Critical areas driving future progress in Cr-and Fe-doped chalcogenide middle infrared lasers: fabrication of binary and ternary II-VI ceramic gain media with low phonon cut-off, low optical losses and high design flexibility; high performance laser design with improved characteristics in power (power scaling to dozens of Watts), spectral (spectral coverage over 1.8-6 μm), temporal (frequency comb generation), and pump domains (electrically pumped Cr-and Fe-doped II-VI quantum confined structures).

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Section: Crystal Growthmentioning

confidence: 99%

Progress in Cr²⁺and Fe²⁺doped mid‐IR laser materials

Mirov

Fedorov

Moskalev

et al. 2010

Laser & Photonics Reviews

210

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“…3 Because of the nanoscale nature of light absorption and photocurrent generation in solar energy conversion, the advent of methods for controlling inorganic materials on the nanometer scale opens opportunities for the development of future generations of solar cells. 4 Apart from that, doping of nanoporous II-VI materials with transition metals 5 opens prospects for the elaboration of midinfrared random lasers.…”

Section: Introductionmentioning

confidence: 99%

Porosity-induced blueshift of photoluminescence in CdSe

Monaico

Ursaki

Tiginyanu

et al. 2006

Journal of Applied Physics

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Porous CdSe layers have been fabricated by anodic etching of n-type single crystalline substrates with different values of conductivity. The morphology and porosity of the layers thus produced were found to be controlled by the conductivity of the material, anodization voltage, and conditions of in situ UV illumination. The porosity-induced changes in the photoluminescence spectra were studied. The decrease of the skeleton size down to 10-20 nm was found to result in a blueshift of the excitonic emission lines by 10 meV which was attributed to quantum-size effects in the nanocrystalline CdSe porous skeleton. An increase of the exciton-LO-phonon interaction by a factor of 1.5 in a weak-to-intermediate confinement regime was deduced from the analysis of temperature dependence of the free exciton luminescence line.

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“…Strong absorption has been found in the near IR range originating from the intracentre transition 5 T 2 to 5 E of Cr 2+ ions in CdSeS crystals in 2006. 29 Studies of Cr doped CdTe showed that the actual dopant content in the host lattice was strongly limited by poor chromium solubility in this compound. 30 The electronic and magnetic properties of Cr-doped Cd-chalcogenides have been investigated to search for new dilute magnetic semiconductor compounds suitable for spintronic applications.…”

Section: Structures and Optimised Parametersmentioning

confidence: 99%

“…Their electronic, optical and magnetic characteristics have also been investigated. [9][10][11][12][13][14][15][16][17][18][19] In 2007, Raman EPR of the transitions due to the spin flip of the 3d electrons of Cr in Zn 1-x Cr x Te and Cd 1-x Cr x Te was observed by Lu et al 20 Cr-doped CdX structures have been studied by first principle density functional theory (DFT) calculations. [21][22][23] However, as far as we know, Raman spectra, orbitals, bonding and transitions have not been reported for Crdoped CdX clusters.…”

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confidence: 99%

Bonding and Spectral Character of Cr Doped Cdte, Cdse and Cds Nano-Clusters

Wang

et al. 2015

Journal of Chemical Research

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The geometrical structures, bonding characteristics, Raman spectra, and molecular orbitals of hexagonal and tetrahedral Cr-doped CdX molecules have been investigated using density functional theory calculations at the B3LYP/LANL2DZ level. The structures of Cr-doped CdX molecules had obvious distortions compared with pure CdX clusters, especially CdCr2Se3 and CdCr2S3 clusters. The Mulliken charges of Cr atoms were negative and were lower than those of Cd atoms in the corresponding structures. Raman spectra showed that there was the vibration of the Cr–Cr bond in Cr-doped CdX molecules. Wiberg bond indices (WBI) values show that there were Cr–Cr bonds in some clusters. WBI values have also revealed that bonds between Cr and Te, Se, S were stronger than those between Cd and X atoms. Finally, molecular orbital observations indicate that the transitions in doped structures were from d orbital to d orbital, which is different from undoped structures.

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Optical and transport properties of chromium-doped CdSe and CdS0.67Se0.33 crystals

Cited by 8 publications

References 17 publications

Progress in Cr²⁺and Fe²⁺doped mid‐IR laser materials

Progress in Cr²⁺and Fe²⁺doped mid‐IR laser materials

Porosity-induced blueshift of photoluminescence in CdSe

Bonding and Spectral Character of Cr Doped Cdte, Cdse and Cds Nano-Clusters

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Optical and transport properties of chromium-doped CdSe and CdS0.67Se0.33 crystals

Cited by 8 publications

References 17 publications

Progress in Cr2+and Fe2+doped mid‐IR laser materials

Progress in Cr2+and Fe2+doped mid‐IR laser materials

Porosity-induced blueshift of photoluminescence in CdSe

Bonding and Spectral Character of Cr Doped Cdte, Cdse and Cds Nano-Clusters

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Progress in Cr²⁺and Fe²⁺doped mid‐IR laser materials

Progress in Cr²⁺and Fe²⁺doped mid‐IR laser materials