Polarization characteristics of the two-photon absorption of light by trivalent rare earth ions in crystals

1976 ◽  
Vol 24 (4) ◽  
pp. 464-469
Author(s):  
A. F. Fedorov ◽  
I. E. Tralle
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Absorption Of Light ◽  
Polarization Characteristics ◽  
Trivalent Rare Earth

Simulating resonance-mediated two-photon absorption enhancement in rare-earth ions by a rectangle phase modulation

2018 ◽  
Vol 27 (1) ◽  
pp. 013202 ◽  
Author(s):  
Da-Long Qi ◽  
Ye Zheng ◽  
Wen-Jing Cheng ◽  
Yun-Hua Yao ◽  
Lian-Zhong Deng ◽  
...  
Keyword(s):  
Rare Earth ◽  
Phase Modulation ◽  
Rare Earth Ions ◽  
Photon Absorption ◽  
Absorption Enhancement ◽  
Two Photon Absorption ◽  
Two Photon

Study on Preparation of RGB Tricolor Up-Conversion Fluorescent Powder

2014 ◽  
Vol 1015 ◽  
pp. 566-569
Author(s):  
Chun Hui Niu ◽  
Yong Lv ◽  
Xiao Ying Li ◽  
Qing Shan Chen
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Photon Absorption ◽  
Green Luminescence ◽  
Solid State Method ◽  
Two Photon Absorption ◽  
Co Doping ◽  
Two Photon ◽  
Luminescence Process ◽  
Rare Earth Doped

For producing RGB tricolor luminescence, three kinds of components of rare-earth ions is chosen, which are Er3+doping, Er3+-Yb3+co-doping and Tm3+-Yb3+co-doping, respectively. Three kinds of rare-earth doped up-conversion fluoride material are prepared based on high temperature solid-state method. Under being excited by 980nm laser, three materials emit red, green and blue light, whose peak wavelengths are 660nm, 550nm and 480nm, respectively. Through analysis of luminescence process, it can be concluded that red and green luminescence are belong to two-photon absorption transversion, and blue luminescence is three-photon absorption transversion.

Coherent phase control of resonance-mediated two-photon absorption in rare-earth ions

2013 ◽  
Vol 103 (19) ◽  
pp. 194104 ◽  
Author(s):  
Shian Zhang ◽  
Chenhui Lu ◽  
Tianqing Jia ◽  
Jianrong Qiu ◽  
Zhenrong Sun
Keyword(s):  
Rare Earth ◽  
Phase Control ◽  
Rare Earth Ions ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Coherent Phase

scholarly journals Межзонный двухфотонный линейно-циркулярный дихроизм в полупроводниках в приближении Кейна

2022 ◽  
Vol 56 (1) ◽  
pp. 61
Author(s):  
В.Р. Расулов ◽  
Р.Я. Расулов ◽  
Б.Б. Ахмедов ◽  
И.А. Муминов
Keyword(s):  
Circular Dichroism ◽  
Photon Absorption ◽  
Degree Of Polarization ◽  
Optical Transitions ◽  
Narrow Gap ◽  
Two Photon Absorption ◽  
Narrow Gap Semiconductors ◽  
Two Photon ◽  
Absorption Of Light ◽  
Circular Dichroïsm

Interband two-photon optical transitions are classified and expressions are obtained for the matrix elements in a narrow-gap semiconductor depending on the band parameters, degree of polarization, and light frequency. It is shown that the main contribution to two-photon linear-circular dichroism in narrow-gap semiconductors is made by optical transitions proceeding from the subband of light holes to the conduction band. The dependences of the partial coefficients of interband two-photon absorption of light, which differ from each other by the types of optical transitions, are analyzed depending on the degree of polarization of the light, and a quantitative analysis of the coefficient of linear-circular dichroism of two-photon absorption of light is carried out. Expressions are obtained for the spectral dependence of the coefficient of interband two-photon absorption of light in narrow-gap semiconductors in the Kane model.

NONLINEAR ABSORPTION AND OPTICAL LIMITING IN SOLUTIONS OF SOME RARE EARTH SUBSTITUTED PHTHALOCYANINES

2001 ◽  
Vol 10 (01) ◽  
pp. 113-121 ◽  
Author(s):  
K. P. UNNIKRISHNAN ◽  
JAYAN THOMAS ◽  
BINOY PAUL ◽  
ACHAMMA KURIAN ◽  
PRAMOD GOPINATH ◽  
...  
Keyword(s):  
Rare Earth ◽  
Absorption Coefficient ◽  
Nonlinear Absorption ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Open Aperture ◽  
Pulse Excitation ◽  
Two Photon Absorption ◽  
Two Photon ◽  
532 Nm

Effective nonlinear absorption coefficient, β eff , of solutions of some rare earth substituted phthalocyanines (viz: Sm(Pc)2, Eu(Pc)2 and LaPc) was measured using open aperture Z-scan technique under nanosecond pulse excitation at 532 nm. The effect of nonlinear absorption on optical limiting in these samples was also investigated. Both nonlinear absorption and optical limiting phenomena in these samples are attributed to sequential two-photon absorption (STPA) process.

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