scholarly journals A very convenient setup to generate intense VUV coherent light at 125 nm with use of nonlinear effects in mercury vapor at room temperature

1995 ◽  
Vol 1 (3) ◽  
pp. 900-907 ◽  
Author(s):  
L. Museur ◽  
W.Q. Zheng ◽  
A.V. Kanaev ◽  
M.C. Castex
Keyword(s):  
Room Temperature ◽  
Nonlinear Effects ◽  
Mercury Vapor ◽  
Coherent Light

Pulse shape analysis resolves room temperature coherent light-matter interaction in quantum dots

2013 ◽  
Author(s):  
Mirco Kolarczik ◽  
Nina Owschimikow ◽  
Yücel I. Kaptan ◽  
Ulrike Woggon ◽  
Julian Korn ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Shape Analysis ◽  
Pulse Shape ◽  
Room Temperature ◽  
Coherent Light ◽  
Pulse Shape Analysis ◽  
Matter Interaction ◽  
Light Matter Interaction

PHOTOCHEMICAL SEPARATION OF MERCURY ISOTOPES: IV. THE REACTION OF Hg2026(3P1) ATOMS, PHOTOEXCITED IN NATURAL MERCURY VAPOR, WITH METHYL CHLORIDE AND ISOPROPYL CHLORIDE

1959 ◽  
Vol 37 (8) ◽  
pp. 1315-1327 ◽  
Author(s):  
K. R. Osborn ◽  
H. E. Gunning
Keyword(s):  
Flow Rate ◽  
Room Temperature ◽  
Methyl Chloride ◽  
Mercury Vapor ◽  
Progressive Increase ◽  
Temperature Data ◽  
Third Body ◽  
Flow Rates ◽  
Fast Flow ◽  
Static Conditions

A detailed investigation has been made of the reaction of Hg2026(3P1) atoms, photoexcited in natural mercury vapor (HgN), with methyl chloride, at room temperature. Data are also reported on the reaction with isopropyl chloride as substrate. Hg202 enrichment in the calomel product is taken as evidence of its formation in the primary quenching reaction.Under static conditions the methyl chloride reaction was found to form calomel with the natural Hg202 abundance (29.8%). With increasing flow rate a progressive increase in Hg202 abundance was observed. Maximum enrichments were found at fast flow rates, low substrate pressures, and high values for the absorbed light intensity (IA). The most highly enriched calomel obtained in this study contained 50.4% Hg202. With increasing IA, a corresponding increase in flow rate was required to achieve maximum Hg202 enrichment. The addition of propylene or butene-1 to the methyl chloride stream was found to result in a slight decrease in Hg202 abundance over that for the pure substrate.The isotopically specific aspects of the reaction are explained in terms of the sequence:[Formula: see text]where M represents a third body, including the wall. The decrease in enrichment observed at high substrate pressures is shown to be due to Lorentz-broadening effects on the hyperfine absorption contours of HgN. The failure to obtain enrichment under static conditions is explained by the depletion in Hg202 of the HgN in the cell through reaction [1].The investigation shows that there are two primary processes operative in the mercury-6(3P1)-photosensitized decomposition of alkyl chlorides, in one of which calomel is formed. These processes presumably involve a common short-lived intermediate R—Cl—Hg.

Functionalized Gold Nanoparticles as an Active Layer for Mercury Vapor Detection at Room Temperature

2021 ◽  
Author(s):  
Ilaria Fratoddi ◽  
Sara Cerra ◽  
Tommaso A. Salamone ◽  
Raoul Fioravanti ◽  
Fabio Sciubba ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Active Layer ◽  
Room Temperature ◽  
Mercury Vapor ◽  
Vapor Detection ◽  
Functionalized Gold Nanoparticles

scholarly journals PHOTOCHEMICAL SEPARATION OF MERCURY ISOTOPES: II. THE REACTION OF Hg2026(3P1) ATOMS, PHOTOEXCITED IN NATURAL MERCURY VAPOR, WITH WATER VAPOR AND OTHER HgO-FORMING SUBSTRATES

1959 ◽  
Vol 37 (1) ◽  
pp. 35-42 ◽  
Author(s):  
R. Pertel ◽  
H. E. Gunning
Keyword(s):  
Nitrous Oxide ◽  
Water Vapor ◽  
Systematic Study ◽  
Room Temperature ◽  
Marked Effect ◽  
Mercury Vapor ◽  
Flow Conditions ◽  
Simple Method ◽  
Factors Influencing ◽  
Enrichment Process

An investigation has been made of the reaction of Hg202(3P1) atoms, photoexcited in natural mercury vapor, with several HgO-forming substrates, including water vapor, nitrous oxide, and oxygen. The reactions were carried out under flow conditions at room temperature. Emphasis has been placed on the Hg202 content of the HgO product. Enrichment in Hg202 would be evidence of the primary formation of a mercury compound.In the reactions with nitrous oxide and oxygen, it was found that the HgO product contained the normal abundance of Hg202. With water vapor, a product containing up to 35% Hg202 was obtained, compared to the normal abundance of 29.8%. The addition of 1,3-butadiene to the water vapor substrate was found to have a marked effect on the enrichment in Hg202 in the HgO product. A product containing 85% Hg202 was recovered when the substrate contained 21 mole % of added butadiene. A systematic study of the effect of butadiene concentration on the enrichment reaction showed that the Hg202 content remains constant for butadiene concentrations exceeding approximately 10 mole %. The water–butadiene reaction is recommended as a simple method for preparing Hg202 from natural mercury.The factors influencing the enrichment process are discussed, together with the significance of the results with respect to the mechanisms of decomposition of the molecules studied.

scholarly journals Chiral Imidazolium Prolinate Salts as Efficient Synzymatic Organocatalysts for the Asymmetric Aldol Reaction

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4190
Author(s):  
Raúl Porcar ◽  
Eduardo García-Verdugo ◽  
Belén Altava ◽  
Maria Isabel Burguete ◽  
Santiago V. Luis
Keyword(s):  
Room Temperature ◽  
Nonlinear Effects ◽  
Reaction Rates ◽  
Aldol Reactions ◽  
Structural Elements ◽  
Imidazolium Cation ◽  
Catalytic Systems ◽  
Asymmetric Aldol ◽  
Analysis Of Results ◽  
Selection Of

Chiral imidazolium l-prolinate salts, providing a complex network of supramolecular interaction in a chiral environment, have been studied as synzymatic catalytic systems. They are demonstrated to be green and efficient chiral organocatalysts for direct asymmetric aldol reactions at room temperature. The corresponding aldol products were obtained with moderate to good enantioselectivities. The influence of the presence of chirality in both the imidazolium cation and the prolinate anion on the transfer of chirality from the organocatalyst to the aldol product has been studied. Moreover, interesting match/mismatch situations have been observed regarding configuration of chirality of the two components through the analysis of results for organocatalysts derived from both enantiomers of prolinate (R/S) and the trans/cis isomers for the chiral fragment of the cation. This is associated with differences in the corresponding reaction rates but also to the different tendencies for the formation of aggregates, as evidenced by nonlinear effects studies (NLE). Excellent activities, selectivities, and enantioselectivities could be achieved by an appropriate selection of the structural elements at the cation and anion.

Self-Induced Transparency in Excitons

1974 ◽  
Vol 52 (21) ◽  
pp. 2127-2131 ◽  
Author(s):  
V. Krishan ◽  
S. Krishan
Keyword(s):  
Frequency Spectrum ◽  
Pulse Propagation ◽  
Nonlinear Effects ◽  
The Self ◽  
Coherent Light ◽  
Frenkel Excitons ◽  
Induced Transparency

The interaction of intense coherent light with Frenkel excitons has been studied for investigating the self-induced transparency. Some nonlinear effects neglected before have been included. It is found that the frequency spectrum consistent with the pulse propagation is wider by two orders of magnitude compared with the previous result.

scholarly journals Room temperature exciton–polariton Bose–Einstein condensation in organic single-crystal microribbon cavities

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ji Tang ◽  
Jian Zhang ◽  
Yuanchao Lv ◽  
Hong Wang ◽  
Fa Feng Xu ◽  
...  
Keyword(s):  
Single Crystal ◽  
Room Temperature ◽  
Binding Energies ◽  
Einstein Condensation ◽  
Coherent Light ◽  
Optical Logic ◽  
Bose Einstein Condensation ◽  
Organic Single Crystal ◽  
Frenkel Excitons ◽  
Bose Einstein

AbstractExciton–polariton Bose–Einstein condensation (EP BEC) is of crucial importance for the development of coherent light sources and optical logic elements, as it creates a new state of matter with coherent nature and nonlinear behaviors. The demand for room temperature EP BEC has driven the development of organic polaritons because of the large binding energies of Frenkel excitons in organic materials. However, the reliance on external high-finesse microcavities for organic EP BEC results in poor compactness and integrability of devices, which restricts their practical applications in on-chip integration. Here, we demonstrate room temperature EP BEC in organic single-crystal microribbon natural cavities. The regularly shaped microribbons serve as waveguide Fabry–Pérot microcavities, in which efficient strong coupling between Frenkel excitons and photons leads to the generation of EPs at room temperature. The large exciton–photon coupling strength due to high exciton densities facilitates the achievement of EP BEC. Taking advantages of interactions in EP condensates and dimension confinement effects, we demonstrate the realization of controllable output of coherent light from the microribbons. We hope that the results will provide a useful enlightenment for using organic single crystals to construct miniaturized polaritonic devices.

Coherent light matter interactions in nanostructure based active semiconductor waveguides operating at room temperature

2019 ◽  
Vol 6 (4) ◽  
pp. 041317 ◽  
Author(s):  
Gadi Eisenstein ◽  
Johann Peter Reithmaier ◽  
Amir Capua ◽  
Ouri Karni ◽  
Akhilesh Kumar Mishra ◽  
...  
Keyword(s):  
Room Temperature ◽  
Coherent Light ◽  
Semiconductor Waveguides
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