Infrared Absorption in Some II-VI Compounds Doped with Cr

Vallin, J. T.; Slack, Glen A.; Roberts, Shepard; Hughés, A.E.

doi:10.1103/physrevb.2.4313

Cited by 264 publications

(132 citation statements)

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“…EPR [7] and optical absorption data [8,9] are consistent with a strong static tetragonal (D 2d ) Jahn-Teller distortion. This situation can be described by assuming that this static JahnTeller interaction is smaller than the crystal field splitting Δ but larger than the spin-orbit interaction (see Fig.…”

Section: Optical and Magnetic Properties Of Chromium-based Ii-vi Compsupporting

confidence: 50%

“…Using this model and λ = 58 cm -1 , we obtain the material parameters given in Table 1 from a fit of the numerical diagonalization of the 25 × 25 Hamiltonian (1) to experiment. Notice that in contrast to results obtained by others [9][10][11], we have used the free ion value λ for chromium in our fitting procedure, instead of relying on the measurements [8,9] of the Jahn-Teller energy in the ground state orbital triplet. The static JahnTeller distortion in the 5 Γ 3 orbital excited state has been neglected here in agreement with references [7] and [8].…”

Section: Optical and Magnetic Properties Of Chromium-based Ii-vi Compmentioning

confidence: 95%

See 1 more Smart Citation

Optical and magnetic properties of Fe2+ and Cr2+ in II–VI semiconductors: the Jahn-Teller effect

Colignon

Kartheuser

Rodríguez

et al. 1996

Journal of Crystal Growth

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The 5 D terms of Fe 2+ and Cr 2+ in the tetrahedral potential at cation sites in II-VI compounds split into orbital doublet and triplet states. While in Cr 2+ the orbital triplet has lower energy than the doublet, the opposite is the case in Fe 2+ . Both ions have singlet ground states after the spin-orbit interaction is taken into account and, hence, both are Van Vleck paramagnets. The optical absorption spectra of Fe and Cr based materials differ and are explained on the basis of a dynamic Jahn-Teller effect in the former and a static one in the latter. These considerations permit us to explain the optical as well as the magnetic properties observed in these materials.

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Section: Optical and Magnetic Properties Of Chromium-based Ii-vi Compsupporting

confidence: 50%

Section: Optical and Magnetic Properties Of Chromium-based Ii-vi Compmentioning

confidence: 95%

Optical and magnetic properties of Fe2+ and Cr2+ in II–VI semiconductors: the Jahn-Teller effect

Colignon

Kartheuser

Rodríguez

et al. 1996

Journal of Crystal Growth

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“…Непо-средственными примерами для сравнения с настоящей работой являются спектры центров Cr в различных кристаллах А II В VI с двухзарядным состоянием изоли-рованного Cr [1,4]. В оптических спектрах Cr наблю-даются широкие полосы ∼ 100 мэВ со слабыми бес-фононными линиями и доминирующими фононными крыльями.…”

Section: результаты и их обсуждениеunclassified

“…Сильное электрон-фононное взаимодействие, как правило, приводит также к ян-теллеровской деформации центров (см. в [1]). При постановке настоящих исследо-ваний имелось в виду выяснение особенностей люминес-ценции центров переходных 5d-элементов (группа пла-тины) по сравнению со спектрами 3d-элементов (груп-па железа) в полупроводниковых соединениях А II В VI , в данной работе -на примере примеси вольфрама в ZnSe, CdS и СdSe.…”

Section: Introductionunclassified

Излучательные d-d-переходы на центрах вольфрама в полупроводниках А-=SUP=-II-=/SUP=-В-=SUP=-VI-=/SUP=-

Ushakov¹,

Кривобок²,

Пручкина³

2017

Физика И Техника Полупроводников

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Исследованы спектры люминесценции примесных центров W в полупроводниках АIIВVI ZnSe, CdS и CdSe. Обнаружено, что при переходе от электронной системы 3d-центров (Cr) к системе 5d-центров (W) происходит существенное изменение спектральных характеристик примесного излучения. Идентификация электронных переходов проведена по диаграммам Танабе-Сугано теории кристаллического поля. С учетом особенностей спектров установлено, что излучательные переходы на 5d-центрах W в исследованных кристаллах происходят в области слабого кристаллического поля между уровнями с различными значениями спина. DOI: 10.21883/FTP.2017.03.44203.8398

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“…The crystal used for this one-of-akind laser was so hygroscopic that it had to be kept in a dry atmosphere with [59,60,61,62,63,64,65,66,67] -were only produced with sufficient quality, and made to lase, in the mid 1990s at Lawrence Livermore National Laboratory [68]. The first lasing action in Cr 2+ :CdSe was reported in 2007 [69] and complete spectroscopic characterization of Cr 2+ :CdS has been reported only this year [70].…”

Section: Crystal Gain Storage Based Ultrafast Mid-ir Sourcesmentioning

confidence: 99%

Ultrashort pulse generation in the mid-IR

Pires

Baudisch

Sánchez

et al. 2015

Progress in Quantum Electronics

104

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Recent developments in laser sources operating in the mid-IR (3 -8 µm), have been motivated by the numerous possibilities for both fundamental and applied research. One example is the ability to unambiguously detect pollutants and carcinogens due to the much larger oscillator strengths of their absorption features in the mid-IR spectral region compared with the visible. Broadband sources are of particular interest for spectroscopic applications since they remove the need for arduous scanning or several lasers and allow simultaneous use of multiple absorption features thus increasing the confidence level of detection. In addition, sources capable of producing ultrashort and intense mid-IR radiation are gaining relevance in attoscience and strong-field physics due to wavelength scaling of re-collision based processes. In this paper we review the state-of-the-art in sources of coherent, pulsed mid-IR radiation. First we discuss semi-conductor based sources which are compact and turnkey, but typically do not yield short pulse duration. Mid-IR laser gain material based approaches will be discussed, either for direct broadband mid-IR lasers or as narrowband pump lasers for parametric amplification in nonlinear crystals. The main part will focus on mid-IR generation and amplification based on parametric frequency conversion, enabling highest mid-IR peak power pulses. Lastly we close with an overview of nonlinear post-compression techniques, for decreasing pulse duration to the sub-2-optical-cycle regime.

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Infrared Absorption in Some II-VI Compounds Doped with Cr

Cited by 264 publications

References 61 publications

Optical and magnetic properties of Fe2+ and Cr2+ in II–VI semiconductors: the Jahn-Teller effect

Optical and magnetic properties of Fe2+ and Cr2+ in II–VI semiconductors: the Jahn-Teller effect

Излучательные d-d-переходы на центрах вольфрама в полупроводниках А-=SUP=-II-=/SUP=-В-=SUP=-VI-=/SUP=-

Ultrashort pulse generation in the mid-IR

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