Resonance Enhancement in Laser-Produced Plasmas

A comprehensive guide to a new technology for enabling high-performance spectroscopy and laser sources

Resonance Enhancement in Laser-Produced Plasmas offers a guide to the most recent findings in the newly emerged field of resonance-enhanced high-order harmonic generation using the laser pulses propagating through the narrow and extended laser-produced plasma plumes. The author--a noted expert in the field--presents an introduction and the theory that underpin the roles of resonances in harmonic generation. The book also contains a review of the most advanced methods of plasma harmonics generation at the conditions of coincidence of some harmonics, autoionizing states, and some ionic transitions possessing strong oscillator strengths.

Comprehensive in scope, this text clearly demonstrates the importance of resonance-enhanced nonlinear optical effects leading to formation of efficient sources of coherent extreme ultraviolet radiation that can be practically applied. This important resource:

• Puts the focuses on novel applications of laser-plasma physics, such as the development of ultrashort-wavelength coherent light sources

• Details both the theoretical and experimental aspects of higher-order harmonic generation in laser-produced plasmas

• Contains information on early studies of resonance enhancement of harmonics in metal-ablated plasmas

• Analyzes the drawbacks of different theories of resonant high order harmonic generation

• Includes a discussion of the quasi-phase-matching and properties of semiconductor plasmas

Written for researchers and students in the fields of physics, materials science, and electrical engineering who are interested in laser physics and optics, Resonance Enhancement in Laser-Produced Plasmas offers an introduction to the topic and covers recent experimental studies of various resonance processes in plasmas leading to enhancement of single harmonic.

Auteur

Rashid A. Ganeev is a Professor at Changchun Institute of Optics, Fine Mechanics and Physics in China. His main area of research is a nonlinear optics, including high-order harmonic generation of laser radiation in plasmas and investigation of the nonlinear optical properties of various media. He is also interested in the investigation and construction of coherent extreme ultraviolet radiation sources and high-power solid-state laser physics.

Contenu
Preface xiii

1 High-Order Harmonic Studies of the Role of Resonances on the Temporal and Efficiency Characteristics of Converted Coherent Pulses: Different Approaches 1

1.1 Resonance Harmonic Generation in Gases:Theory and Experiment 1

1.2 Role of Resonances in Plasma Harmonic Experiments: Intensity and Temporal Characterization of Harmonics 9

References 13

2 Different Theoretical Approaches in Plasma HHG Studies at Resonance Conditions 17

2.1 Comparative Analysis of the High-Order Harmonic Generation in the Laser Ablation Plasmas Prepared on the Surfaces of Complex and Atomic Targets 18

2.2 Nonperturbative HHG in Indium Plasma: Theory of Resonant Recombination 22

2.2.1 Principles ofTheory 22

2.2.2 Discussion 24

2.2.3 Important Consequences 27

2.3 Simulation of Resonant High-Order Harmonic Generation in Three-Dimensional Fullerenelike System by Means of Multiconfigurational Time-Dependent HartreeFock Approach 29

2.3.1 Basics of the Nonlinear Optical Studies of Fullerenes 29

2.3.2 Simulations and Discussion 32

2.4 Endohedral Fullerenes: AWay to Control Resonant HHG 35

2.4.1 Theoretical Approach and Details of Computation 37

2.4.2 Results of Simulations and Discussion 39

References 43

3 Comparison of Resonance Harmonics: Experiment and Theory 47

3.1 Experimental and Theoretical Studies of Two-Color Pump Resonance-Induced Enhancement of Odd and Even Harmonics from a Tin Plasma 47

3.1.1 Experimental Studies 48

3.1.2 Theoretical Approach 52

3.2 Comparative Studies of Resonance Enhancement of Harmonic Radiation in Indium Plasma Using Multicycle and Few-Cycle Pulses 58

3.2.1 Introduction 58

3.2.2 Indium Emission Spectra in the Cases of 40 and 3.5 fs Driving Pulses 60

3.2.3 Testing the Indium Emission Spectra Obtained Using 3.5 fs Pulses 64

3.2.4 Theoretical Consideration of the Microscopic Response 67

3.2.5 Experimental Studies of Harmonic Yield on the CEP of Laser Pulse 70

3.2.6 Discussion 73

3.3 Indium Plasma in the Single- and Two-Color Near-Infrared Fields:Enhancement of Tunable Harmonics 76

3.3.1 Description of Problem 76

3.3.2 Experimental Arrangements for HHG in Indium Plasma Using Tunable NIR Pulses 77

3.3.3 Experimental Studies of the Resonance Enhancement of NIR-Induced Harmonics in the Indium Plasma 80

3.3.4 Theory of the Process 86

3.3.5 Discussion and Comparison ofTheory and Experiment 91

3.4 Resonance Enhancement of Harmonics in Laser-Produced Zn II and Zn III Containing Plasmas Using Tunable Near-Infrared Pulses 95

3.4.1 Single- and Two-Color Pumps of Zinc Plasma 95

3.4.2 Modification of Harmonic Spectra at Excitation of Neutrals and Doubly Charged Ions of Zn 97

3.4.3 Peculiarities of HHG in Zinc Plasma Using Tunable Pulses 100

3.5 Application of Tunable NIR Radiation for Resonance Enhancement of Harmonics in Tin, Antimony, and Chromium Plasmas 105

3.5.1 Experimental Results 105

3.5.2 Theoretical Analysis of Resonance-Enhanced Harmonic Spectra from Sn, Sb, and Cr Plasmas 113

3.5.3 Discussion 118

3.6 Model of Resonant High Harmonic Generation in Multi-Electron Systems 120

3.6.1 Theory 121

3.6.2 Calculations 127

3.6.3 Experiment 131

References 134

4 Resonance Enhancement of Harmonics in Metal-Ablated Plasmas: Early Studies 139

4.1 Indium Plasma: Ideal Source for Strong Single Enhanced Harmonic 139

4.1.1 Strong Resonance Enhancement of Single Harmonic Generated in Extreme Ultraviolet Range 139

4.1.2 Chirp-Induced Enhancement of Harmonic Generation from Indium-Containing Plasmas 143

4.1.2.1 Preparation of the Optimal Plasmas 145

4.1.2.2 Optimization of High Harmonic Generation 148

4.1.2.3 Chirp Control 150

4.1.2.4 Discussion 152

4.2 Harmonic Generation from Different Metal Plasmas 158

4.2.1 Chromium Plasma: Sample for Enhancement and Suppression of Harmonics 158 4.2.2 Studies of Resonance-Induced Single Harmonic Enhancement in Manganes...