Topics

Enhanced Coherent Emission from Ionized Nitrogen Molecules by Femtosecond Laser Pulses.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Enhanced Coherent Emission from Ionized Nitrogen Molecules by Femtosecond Laser Pulses."

The forward emission spectra were experimentally measured for ionized nitrogen molecules by an 800-nm pump laser and a delayed seed laser. It was found that emission lines around both 428 nm and 391 nm are greatly enhanced with injecting either a 391-nm or 428-nm seed laser. The emission lines around 391 nm and 428 nm can be assigned to the rotational transitions of N2+ (B2Σu+, v'=0 → X2Σg+, v=0) and N2+ (B2Σu+, v'=0 → X2Σg+, v=1), respectively. They origin from seed-induced superfluorescence and resonant stimulated Raman scattering. The genetic algorithm was utilized to simulate the experimental observations and determine the relative population of B2Σu+(v'=0), X2Σg+(v=1) and X2Σg+(v=0). The result verifies that the vibrational population inversion is achieved between B2Σu+(v'=0) and X2Σg+(v=0) by the 800-nm pump laser. Our finding provides new insights into controlling the coherent emission of ionized nitrogen molecules, which has promising application in filamentation-based remote atmospheric sensing.

Affiliation

Journal Details

This article was published in the following journal.

Name: The journal of physical chemistry letters
ISSN: 1948-7185
Pages:

Links

DeepDyve research library

PubMed Articles [12776 Associated PubMed Articles listed on BioPortfolio]

Optimization of off-axis electron holography performed with femtosecond electron pulses.

We report on electron holography experiments performed with femtosecond electron pulses in an ultrafast coherent Transmission Electron Microscope based on a laser-driven cold field emission gun. We fi...

Excitation of coherent optical phonons in iron garnet by femtosecond laser pulses.

We employed femtosecond pump-probe technique to investigate the dynamics of coherent optical phonons in iron garnet. A phenomenological symmetry-based consideration reveals that oscillations of the te...

Two-beam coherent combining based on Ti:sapphire chirped-pulse amplification at the repetition of 1  Hz.

In this Letter, we report the demonstration of the coherent beam combining (CBC) of two-beam femtosecond laser pulses based on chirped-pulse amplification (CPA). To the best of our knowledge, this is ...

Improvement of cleaner composting production by adding Diatomite: From the nitrogen conservation and greenhouse gas emission.

In order to investigate the improvement of Diatomite (DM) on the production of cleaner composting, reflected by emission of NH and greenhouse gases (GHGs), three dosages of DM (0%, 5% and 10%) were ad...

Coherent vibrational and dissociation dynamics of polyatomic radical cations.

The ultrafast dynamics of polyatomic radical cations contribute to important processes including energy transfer in photovoltaics, electron transfer in photocatalysis, radiation-induced DNA damage, an...

Clinical Trials [3332 Associated Clinical Trials listed on BioPortfolio]

Clinical Research of Femtosecond Laser-Assisted Cataract Surgery

Since femtosecond laser was approved for cataract surgery by FDA in 2010, femtosecond laser assisted cataract surgery (FLACS) has demonstrated high precision of capsulotomy, reduced phacoe...

Alkaline Ionized Water: Sports Recovery and Inflammation Management

The purpose of this study is to determine whether consumption of alkaline ionized water is effective for accelerating sports recovery.

Use of the Visumax™ Femtosecond Laser

The objective of this clinical trial is to evaluate the safety and effectiveness of the Carl Zeiss Meditec VisuMax™ Femtosecond Laser lenticule removal procedure for the reduction or eli...

Cryogenic Preservation of Spermatozoa

The reference technique for the conservation of gametes is storage in liquid nitrogen but new vats of nitrogen vapor (storage over liquid nitrogen) or in dry phase (storage in an insulated...

Ionized Calcium and Behavioural Disorders in Older Adults (CALICO Study)

The primary objective of this study is to determine whether geriatric inpatients with severe behavioral disorders exhibit higher serum ionized calcium concentration than geriatric inpatien...

Medical and Biotech [MESH] Definitions

Ionized gases, consisting of free electrons and ionized atoms or molecules which collectively behave differently than gas, solid, or liquid. Plasma gases are used in biomedical fields in surface modification; biological decontamination; dentistry (e.g., PLASMA ARC DENTAL CURING LIGHTS); and in other treatments (e.g., ARGON PLASMA COAGULATION).

An imaging technique using compounds labelled with short-lived positron-emitting radionuclides (such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18) to measure cell metabolism. It has been useful in study of soft tissues such as CANCER; CARDIOVASCULAR SYSTEM; and brain. SINGLE-PHOTON EMISSION-COMPUTED TOMOGRAPHY is closely related to positron emission tomography, but uses isotopes with longer half-lives and resolution is lower.

Techniques for separation and identification of ionized molecules based on their drift through a gas phase after being accelerated by an electric field. Their mobilities will be effected by their shape, size, and charge.

A type of FLUORESCENCE SPECTROSCOPY using two FLUORESCENT DYES with overlapping emission and absorption spectra, which is used to indicate proximity of labeled molecules. This technique is useful for studying interactions of molecules and PROTEIN FOLDING.

An optical source that emits photons in a coherent beam. Light Amplification by Stimulated Emission of Radiation (LASER) is brought about using devices that transform light of varying frequencies into a single intense, nearly nondivergent beam of monochromatic radiation. Lasers operate in the infrared, visible, ultraviolet, or X-ray regions of the spectrum.

Quick Search


DeepDyve research library

Searches Linking to this Article