Optical Properties and White-Light Emission in Dy3+-Doped Transparent Oxyfluoride Glass and Glass Ceramics Containing CaF2 Nanocrystals ¡¤¡¤¡¤¡¤¡¤¡¤ ¡¤¡¤¡¤¡¤¡¤¡¤

Concomitant emergence of circularly polarized luminescence and single-molecule magnet behavior in chiral-at-metal Dy complex

“…Two groups of emission peaks appear at 573 and 663 nm and are attributed respectively to the 4 F 9/2 -6 H 13/2 and 4 F 9/2 -6 H 11/2 transitions of Dy(III). 27,28 The emission intensity decreases as a function of temperature, barely any emission being observed above 30 K. For both transitions, the left-handed circularly-polarized emission is slightly stronger than the right-handed polarization. This observation was made for all observed Λ-Dy crystals.…”

Photoluminescence, TGA/DSC and photocatalytic activity studies of Dy3+ doped SrY2O4 nanophosphors

“…Of the three peaks, the peak at 354 nm has the highest intensity and so we excited the SrY 2 O 4 :Dy 3+ sample at this wavelength. At an excitation wavelength of 354 nm, the Dy 3+ -doped SrY 2 O 4 nanophosphors show broad blue and yellow colour emission at wavelengths of 491 nm ( 4 F 9/2 / 6 H 15/2 ) and 581 nm ( 4 F 9/2 / 6 H 13/2 ) with the highest intensity, [1][2][3][4] as shown in Fig. 6(b).…”

“…The blue emission is due to the 4 F 9/2 / 6 H 15/2 transition and the yellow emission band is due to the 4 F 9/2 / 6 H 13/2 transition. [1][2][3][4] Trivalent rare earth (RE 3+ ) doped inorganic nanophosphors may be broadly applied in display devices, uorescent tubes, optical sensors, white light emitting diodes (w-LEDs), biological imaging, and scintillators due to their superior thermal and chemical stabilities and unique optical properties. [5][6][7][8][9][10][11][12][13][14][15] Among these uses, w-LEDs are regarded as future light devices that may replace present traditional sources of light because of their low energy consumption, better consistency, higher brightness, longer operating times, and ecofriendly properties.…”

Constellation Design for Single Photodetector Based CSK With Probabilistic Shaping and White Color Balance

“…5 for deriving the approximate mathematical model of the region. Every (x, y) coordinates in the whole white region does not give pure white light; however, (x, y) coordinates inside the white light region has been considered in designing LEDs in literature [26]- [29]. There is a trade-off between the purity of white tone and SNR performance; the focus of the proposed work is to obtain optimized constellation points which maintain the bare minimum acceptable white light.…”