Topic
Excimer
About: Excimer is a research topic. Over the lifetime, 3725 publications have been published within this topic receiving 75104 citations.
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TL;DR: In this article, reversible modulation of the monomer/excimer emission was observed for bispyrene molecules 1 and 2 through the solution-gel phase transition (with gelator 3 as the LMWG) and accordingly a thermo-driven molecular fluorescence switch can be established.
23 citations
TL;DR: In this article, the excited-state dynamics of pyrene incorporated into poly(substituted methylene)s is investigated by femtosecond time-resolved near-IR absorption spectroscopy in the 900-1400 nm region.
Abstract: The excited-state dynamics of pyrene incorporated into poly(substituted methylene)s is investigated by picosecond time-resolved fluorescence spectroscopy and femtosecond time-resolved near-IR absorption spectroscopy in the 900–1400 nm region The pyrene rings in poly(substituted methylene)s are photoexcited to the monomer excited state immediately after UV irradiation, followed by prompt excimer formation with time constants of a few picoseconds to a few hundred picoseconds The excimer formation in poly(substituted methylene)s proceeds with much shorter time constants than that in pyrene-incorporated polyacrylates, vinyl polymer counterparts with the same side-chain structures, indicating the presence of stronger electronic interaction between the pyrene rings in poly(substituted methylene)s The effects of every methylene substitution hold when each pyrene ring is connected to the polymer backbone with a monomethylene linker, while the effects are observed only weakly when a tetramethylene linker is emp
23 citations
Journal Article•
TL;DR: In this paper, the authors investigated the emission characteristics of coaxial (XeCl and KrCl) and planar (Kr 2 and An) excilamps pumped by a barrier discharge, and the data on the emission of excimer and exciplex molecules available in the literature were analyzed.
Abstract: Emission characteristics of coaxial (XeCl and KrCl) and planar (Kr 2 and An) excilamps pumped by a barrier discharge are investigated, and the data on the emission of excimer and exciplex molecules available in the literature are analyzed. It is demonstrated that the maximum efficiencies and mean powers of emission can be achieved with the use of excitation pulses with a duration of tens of microseconds. The main processes influencing the formation and quenching of working molecules are considered. Optimal mixtures and pressures are determined. Efficiencies with respect to the power of a pump source up to 14% and power densities of emitted radiation up to 37 mW/cm 2 are predicted for XeCl and KrCl excilamps.
23 citations
TL;DR: In this paper, an evaluation of a XeCl excimer laser for the laser processing of Si is reported, and the annealing quality of ion-implantation damage, as measured by the crystalline perfection of the regrown layer and by p-n junction characteristics, is similar to that obtained with ruby or Nd:YAG lasers.
Abstract: An evaluation of a XeCl excimer laser for the laser processing of Si is reported. The annealing quality of ion-implantation damage, as measured by the crystalline perfection of the regrown layer and by p-n junction characteristics, is similar to that obtained with ruby or Nd:YAG lasers. However, the wide energy window between annealing and surface damage, the flat smooth surface obtained after laser irradiation, the capability of providing deep surface melting, and other features, indicate that XeCl and perhaps other excimer lasers is nearly ideal for semiconductor processing.
23 citations
01 Jan 1996
TL;DR: In this paper, the absolute concentrations of total gas-phase sodium and potassium compounds were determined in the flue gas of a fluidized bed coal combustor at 10 bar using excimer laser-induced fragmentation fluorescence (ELIF).
Abstract: Absolute concentrations of total gas-phase sodium and potassium compounds were determined in the flue gas of a fluidized bed coal combustor at 10 bar using excimer laser-induced fragmentation fluorescence (ELIF). In this in situ and on-line technique, the alkali compound molecules are photodissociated by ArF-excimer laser light at 193 nm, whereby excited Na(3 2 P ) and K(4 2 P ) atoms are formed. Fluorescence from these atoms is simultaneously detected in two separate channels at 589 nm and 768 nm, respectively. The calibration system and data evaluation procedure to convert measured signals to absolute concentrations is described. Studies on lignite and hard coal under several different combustion conditions are reported. The measured concentrations span a dynamic range of more than three orders of magnitude, with a detection limit of
23 citations