Competition between spontaneous radiation and ionization in the process of resonance enhanced multi-photon ionization

Guiyin Zhang; Haiping Li; Haiming Zheng; Hui Ji

doi:10.1117/12.981936

29 November 2012 Competition between spontaneous radiation and ionization in the process of resonance enhanced multi-photon ionization

Guiyin Zhang, Haiping Li, Haiming Zheng, Hui Ji

Author Affiliations +

Proceedings Volume 8551, High-Power Lasers and Applications VI; 855104 (2012) https://doi.org/10.1117/12.981936
Event: Photonics Asia, 2012, Beijing, China

Abstract

Photo-ionization probability is an important factor in the practical use of resonance enhanced multiphoton ionization (REMPI). To a certain experimental condition, it depends on the competition between spontaneous radiation and ionization of the excited particles. In this work, we investigate the influence of laser resonance detuning, Rabi frequency and ionization rate on spontaneous radiation and ionization in the process of REMPI with the theory of density matrix equation. A model of three energy level system is adopted. It is found that the spontaneous radiation and ionization probability increase with the decrease of laser resonance detuning. They get to the maximum when resonance detuning equals zero. The line width of spontaneous emission will decrease with the increase of ionization rate due to the competition between spontaneous radiation and ionization. In addition, the spontaneous radiation and ionization probability increase with Rabi frequency until gets to saturation. Laser resonance detuning has no influence on the saturation value. It only influences the Rabi frequency for saturation. If Rabi frequency increases further after saturation, the spontaneous radiation will decrease because of the phenomena of energy level splitting in strong laser field. Now that resonant absorption and large laser intensity can increase the ionization probability greatly, so we must select suitable laser frequency and large laser intensity in the practical use of REMPI, in order to get optimum detection result.

Citation Download Citation

Guiyin Zhang, Haiping Li, Haiming Zheng, and Hui Ji "Competition between spontaneous radiation and ionization in the process of resonance enhanced multi-photon ionization", Proc. SPIE 8551, High-Power Lasers and Applications VI, 855104 (29 November 2012); https://doi.org/10.1117/12.981936

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Ionization

Particles

Resonance enhancement

Probability theory

Absorption

Photons

Multiphoton processes

Show All Keywords

Keywords/Phrases

Search In:

Publication Years