Journal ArticleDOI
Measurement of excited‐state‐absorption loss for Ce3+ in Y3Al5O12 and implications for tunable 5d→4f rare‐earth lasers
Reads0
Chats0
TLDR
In this article, optical probe measurements of excited Ce3+ ions in Y3Al5O12 show that stimulated emission in the 550-610nm region is not possible at 295 K because of excited state absorption.Abstract:
Broad bandwidth 5d→4f transitions in Ce3+ have been considered for tunable laser action. In this letter, optical probe measurements of excited Ce3+ ions in Y3Al5O12 show that stimulated emission in the 550–610‐nm region is not possible at 295 K because of excited‐state absorption. Transient measurements demonstrate that part of this loss has ≈75‐ns lifetime and is associated with absorption from the lowest 5d level; a longer‐lifetime loss is also observed. The excited‐state‐absorption loss is reduced at lower temperatures.read more
Citations
More filters
Patent
Light-radiating semiconductor component with a luminescence conversion element
Ulrike Reeh,Klaus Höhn,Norbert Stath,Günter Waitl,Peter Schlotter,Jürgen Schneider,Ralf Schmidt +6 more
TL;DR: In this article, a light-radiating semiconductor component has a radiation-emitting semiconductor body and a luminescence conversion element, which converts a portion of the radiation into radiation of a longer wavelength.
Journal ArticleDOI
Enhancement of red spectral emission intensity of Y3Al5O12:Ce3+ phosphor via Pr co-doping and Tb substitution for the application to white LEDs
TL;DR: In this paper, a blue light emitting diode (LED) pumped white LED with yellow emitting (YAG:Ce) phosphor using addition of Pr and Tb as a co-activator and host lattice element, respectively.
Journal ArticleDOI
Light converting inorganic phosphors for white light-emitting diodes
TL;DR: In this paper, the authors reviewed the status of phosphors for LEDs and prospect the future development and proposed new phosphors that can absorb excitation energy from blue or nUV LEDs and generate visible emissions efficiently.
Journal ArticleDOI
An empirical relation fitting the position in energy of the lower d-band edge for Eu2+ or Ce3+ in various compounds
TL;DR: In this article, the position of the d-band edge (E) in energy for rare earth ions that fluoresce with broad emission bands is known to be sensitive to electron-electron repulsion between the active cation and its surrounding anions.
Journal ArticleDOI
Tunable solid-state lasers
TL;DR: In this paper, the basic physics of tunable solid-state lasers and the characteristics of the most significant established and emerging systems are discussed, with particular emphasis on trivalent transition metals; alexandrite, other Cr-doped systems, and Ti: sapphire.
References
More filters
Journal ArticleDOI
Investigation of Some Ce3+‐Activated Phosphors
G. Blasse,A. Bril +1 more
TL;DR: In this paper, the fluorescence of a number of new Ce3+activated phosphors is described and discussed, and conditions for visible Ce3−activated phosphor emission are indicated, viz., large crystal-field splittings (Y3Al5O12−Ce) or a large Stokes shift (SrY2O4•Ce).
Journal ArticleDOI
Nonradiative decay from 5d states of rare earths in crystals
TL;DR: In this paper, nonradiative decay from 4fn−1 5d states was investigated for trivalent rare earths in Y3Al5O12, and the rates of both 5d→4f and 5d →5d transitions were determined from measurements of the lifetimes and intensities of 5d fluorescence from Ce3+ and Pr3+.
Book ChapterDOI
The influence of charge-transfer and rydberg states on the luminescence properties of lanthanides and actinides
TL;DR: In this paper, the influence of charge transfer and rydberg (f n−1 d) states on the luminescence of lanthanides and actinides (more specifically hexavalent uranium) is demonstrated.
Journal ArticleDOI
VUV fluorescence of Nd3+‐, Er3+, and Tm3+‐doped trifluorides and tunable coherent sources from 1650 to 2600 Å
K. H. Yang,J. A. DeLuca +1 more
TL;DR: In this article, the threshold power for laser action in these crystals by optical pumping has been estimated, using a molecular H2 laser as a pumping source, a laser system which is tunable from 1650 to 2600 A could be constructed.
Journal ArticleDOI
uv fluorescence of cerium‐doped lutetium and lanthanum trifluorides, potential tunable coherent sources from 2760 to 3220 Å
Kei-Hsiung Yang,J. A. DeLuca +1 more
TL;DR: In this paper, the authors reported the five-peak excitation spectrum expected for the 5d state of Ce3+ in a noncubic crystal field is observed, and the fluorescence quantum yields for LaF3 and LuF3 are 0.9 and 0.82, respectively.
Related Papers (5)
A NEW PHOSPHOR FOR FLYING‐SPOT CATHODE‐RAY TUBES FOR COLOR TELEVISION: YELLOW‐EMITTING Y3Al5O12–Ce3+
G. Blasse,A. Bril +1 more