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Nonlinear optical absorption of antimony and lead oxyhalide glasses
(2003-12-16)
The optical limiting behavior and nonlinear optical properties of antimony and lead oxyhalide glasses were discussed. The large nonlinear absorption coefficients which range from 11 to 20 cm/GW was determined using standard ...
Light absorption budget in a reservoir cascade system withwidely differing optical properties
(2019-01-29)
Aquatic systems are complex systems due to the environmental pressures that lead to water quality parameter changes, and consequently, variations in optically active compounds (OAC). In cascading reservoir systems, such ...
Giant non-linear absorption in Er3+-doped fluoroindate glass
(1999-06-02)
Non-linear absorption is observed in Er3+-doped fluoroindate glass (in mol% 37InF2:20ZnF2:20SrF2:16BaF2:2GdF2: 2NaF:1GaF3:2ErF3) when the sample is irradiated with a CW laser emitting at 650 nm. An intensity dependence of ...
Upconversion of infrared-to-visible light in Pr3+-Yb3+ codoped fluoroindate glass
(1998-08-01)
Bright fluorescence in the visible range has been observed in Pr3+-Yb3+ doped fluoroindate glass under infrared diode laser irradiation. The mechanism which contributes for the upconversion emission is identified and the ...
Variability in the light absorption coefficients of phytoplankton, nonalgal particles, and colored dissolved organic matter in a subtropical bay (Brazil)
(Hull, 2014-02-20)
This study characterized the variability in magnitudes and spectral shapes of the absorption coefficients of phytoplankton, detritus, and colored dissolved organic matter (CDOM) in a dynamic bay (Santos Bay) in southeastern ...
Plasmon enhanced light absorption in aluminium@Hematite core shell hybrid nanocylinders: the critical role of length
(Royal Society of Chemistry, 2017-01-12)
The light absorption as well as the near field enhancements properties of Al@α-Fe2O3 core shell hybrid nanocylinders (HNs) have been systematically studied by means of Discrete Dipole Approximation simulations. The Al@α-Fe2O3 ...
Study of KCl + x% in and KCl + y% TlCl thin films
(1998-12-01)
The present work reports the study of KCl thin films doped with In+ or Tl+. Both systems show optical absorption bands similar to single crystals. As the impurity concentration increases, so does the absorption as also the ...
Light Absorption near Threshold with Phonon Participation for Impurities in Semiconductors
(Sociedade Brasileira de Física, 2002)
It is presented a simple model for the calculation of the transition rate for impurities in semiconductors in which electron-phonon interaction is taken into account in a second order time dependent perturbation theory. ...
Optical spectroscopy of Er3+ and Yb3+ co-doped fluoroindate glasses
(1998-02-15)
Optical absorption, Stokes, and anti-Stokes photoluminescence were performed on Er3+-Yb3+ co-doped fluoroindate glasses. For compounds prepared with a fixed 2 mol % ErF3 concentration and YbF3 contents ranging from 0 to 8 ...