Photoinduced optical absorption in Ca3Ga2Ge3O12:Mn garnet

Eremenko, V. V.; Gnatchenko, S. L.; Kachur, I. S.; Piryatinskaya, V. G.; Космына, М. Б.; Nazarenko, B. P.; Puzikov, V. M.

doi:10.1063/1.1390489

Cited by 6 publications

(9 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This class comprises media with completely different origins of the photorefractive response such as, e.g., photorefractive garnets [8,[13][14][15], nitroprussides [9,16], or crystals with DX center defects [10,17,18]. Although the recording of holograms has been investigated intensively in these media a convincing description of the respective kinetics is still missing and cannot be explained by the wellknown models.…”

Section: Institut Fü R Experimentalphysik Universität Wien Boltzmanmentioning

confidence: 99%

Specific Recording Kinetics as a General Property of Unconventional Photorefractive Media

et al. 2004

View full text Add to dashboard Cite

We introduce a model for the kinetics of grating formation during holographic recording in optically excitable two-state systems. An unexpected characteristic time dependence of the diffraction efficiency is found. We show that it originates from a nonlinear transformation of the light interference pattern into a refractive-index profile. Our findings strongly resemble and explain by nature the experimental data of two-state systems in general, here represented by two examples: sodium nitroprusside and terbium gallium garnet.

show abstract

Section: Institut Fü R Experimentalphysik Universität Wien Boltzmanmentioning

confidence: 99%

Specific Recording Kinetics as a General Property of Unconventional Photorefractive Media

et al. 2004

View full text Add to dashboard Cite

show abstract

“…The calcium gadolinium germanium garnet Ca 3 Ga 2 Ge 3 O 12 (CGGG), which belongs to the rich family of garnet-type laser-host crystals, − is also well known as a substrate material for magnetic memories and optical recording . Structural and optical studies were recently carried out on Cr 3+ -doped CGGG phosphors in search of near-infrared (NIR) persistent luminescence materials. , Photo-induced optical absorption in Mn 3+ -doped CGGG single crystals was studied as promising optical recording material …”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature and High Pressure on Luminescence Properties of Mn³⁺ Ions in Ca₃Ga₂Ge₃O₁₂ Single Crystals

et al. 2021

View full text Add to dashboard Cite

In this work, the temperature and high-pressure behaviors of Mn 3+ -doped garnet-type Ca 3 Ga 2 Ge 3 O 12 single crystals have been investigated by means of photoluminescence and Raman spectroscopy, respectively. The Jahn−Teller stabilization energy in the 5 E ground state was found to be 1630 cm −1 , being as much as 6 times greater than that in the 5 T 2 excited state, that is, 237 cm −1 . The room-temperature emission spectrum is dominated by the spin-allowed 5 T 2 → 5 E transition at 670 nm upon 532 nm excitation. The temperature dependences of photoluminescence spectra and time decays reveal strong thermalization between 5 T 2 and 1 T 2 levels. Cooling to 50 K empties the 5 T 2 level by virtue of multiphonon transition to the lower-lying 1 T 2 level. As a result, the 1 T 2 → 3 T 1 / 5 E electric-dipole transitions are induced by coupling to odd-parity phonons. The existence of a small amount of Mn 4+ can be ascertained by lowering the temperature or applying high pressure. Upon compression up to 100 kbar, the 5 T 2 → 5 E transition of Mn 3+ undergoes a blue shift at a rate of ∼10.5 cm −1 /kbar. Since both 5 T 2 and 1 T 2 have inverse crystal field dependences, the quenching process from the 5 T 2 level becomes stronger under high pressure. Cryogenic luminescence ratiometric thermometry based on the diverse thermal quenching behaviors of Mn 3+ and Mn 4+ was explored. Furthermore, theoretical calculations employing the exchange-charge model of crystal field for Mn 3+ and Mn 4+ ions in Ga 3+ octahedral sites (C 3i ) in garnet-type Ca 3 Ga 2 Ge 3 O 12 remain in perfect agreement with the experimental data.

show abstract

“…Finally, in connection with photoinduced magnetism, it should be noted that in some crystals of the family of antiferromagnetic garnets Ca 3 Mn 2 Ge 3 O 12 , etc., photoinduced phenomena have been discovered by Eremenko, Gnatchenko, et al [41][42][43][44] Photoirradiation with visible light gives rise to long-lived changes: linear birefringence, magnetic moment in the antiferromagnetic state, and augmentation of optical absorption coefficient. The observed photoinduced changes of the optical and magnetic properties in antiferromagnetic garnets persist for a long time after the illumination is switched off.…”

Section: Photoinduced Magnetismmentioning

confidence: 99%

Recent progress in magneto-optics and research on its application (Review)

Kojima

Tsushima

2002

Low Temperature Physics

View full text Add to dashboard Cite

Transient spectral dependence of photoinduced magneto-optical Faraday effect in CdTe quantum dots AIP Advances 2, 012116 (2012); 10.1063/1.3679403Magneto-optical spectra of excitons and Landau subbands in strained CdTe epitaxial films under high magnetic fields Various kinds of magneto-optical properties are investigated in rare earth orthochromites. From an analysis of Cr 3ϩ exciton absorption in RCrO 3 ͑RϭTb, Dy, and Ho͒, it is unferred that these compounds exhibit an anomalous spin-reorientation in a magnetic field along the b axis, where the weak ferromagnetic moment of the Cr 3ϩ spins rotates in the ac plane perpendicular to the b axis. In these compounds, when the R 3ϩ spin configuration is disordered, an anomalous satellite band appears on the lower-energy side of the Cr 3ϩ exciton absorption, which is associated with the breakdown of the kϭ0 selection rule due to the disorder of the R 3ϩ spin configuration. In YbCrO 3 , various kinds of cooperative excitations, such as a Cr 3ϩ exciton coupled with an Yb 3ϩ magnon and a Cr 3ϩ ϪYb 3ϩ exciton molecule, which are induced by the antisymmetric exchange interaction between the Cr 3ϩ and Yb 3ϩ spins, appear in the visible region. The propagation of these cooperative excitations depends strongly on the spin structure and the external magnetic field. In ErCrO 3 , a photo-induced spin-reorientation takes place within 50 s after the photo-irradiation corresponding to the 4 A 2g → 2 E g transition of Cr 3ϩ , and it returns to the initial spin configuration in about 400 ms. This phenomenon is detected in the time-resolved Er 3ϩ absorption spectra corresponding to the 4 I 15/2 → 4 I 9/2 transition. Finally, we briefly review the recent frontier research on applications developed mainly in Japan.

show abstract

Photoinduced optical absorption in Ca3Ga2Ge3O12:Mn garnet

Cited by 6 publications

References 7 publications

Specific Recording Kinetics as a General Property of Unconventional Photorefractive Media

Specific Recording Kinetics as a General Property of Unconventional Photorefractive Media

Effect of Temperature and High Pressure on Luminescence Properties of Mn³⁺ Ions in Ca₃Ga₂Ge₃O₁₂ Single Crystals

Recent progress in magneto-optics and research on its application (Review)

Contact Info

Product

Resources

About

Photoinduced optical absorption in Ca3Ga2Ge3O12:Mn garnet

Cited by 6 publications

References 7 publications

Specific Recording Kinetics as a General Property of Unconventional Photorefractive Media

Specific Recording Kinetics as a General Property of Unconventional Photorefractive Media

Effect of Temperature and High Pressure on Luminescence Properties of Mn3+ Ions in Ca3Ga2Ge3O12 Single Crystals

Recent progress in magneto-optics and research on its application (Review)

Contact Info

Product

Resources

About

Effect of Temperature and High Pressure on Luminescence Properties of Mn³⁺ Ions in Ca₃Ga₂Ge₃O₁₂ Single Crystals