Ultrasensitive Laser Spectroscopy


Book Description

Ultrasensitive Laser Spectroscopy covers the experimental methods involved in various sensitive techniques to which lasers have been applied for the study of weak transitions. This book is organized into seven chapters. Each chapter discusses the theories, experiments, and application of the specific technique. A discussion on the advantages, disadvantages, and modifications made in each technique is also provided. Ultrasensitive techniques considered in this text include photoacoustic, one- and two-photon excitation, absorption, mass, and laser ionization spectroscopies. Other chapters examine the techniques of laser intracavity-enhanced, laser absorption, and emission spectroscopy. This book will be of value to spectroscopists, analytical chemists, and researchers in the field of ultrasensitive analysis.










Sensitive Nonlinear Laser-Based Spectroscopic Studies of Chemical and Biological Agents for Biomedical and Security Applications


Book Description

Nonlinear laser wave-mixing spectroscopy is presented as an ultrasensitive detection method for chemical and biological agents in thin-film and liquid-phase samples. Wave mixing is an unusually sensitive absorption-based detection method that offers inherent advantages including excellent sensitivity, small sample requirements, short optical path length, high spatial resolution and excellent standoff detection capability. Wave mixing offers excellent optical absorption detection sensitivity even when using thin samples (




Ultrasensitive Laser Spectroscopy in Solids: Single-Molecule Detection


Book Description

In spite of detection intensity constraints necessary to avoid power broadening, the optical absorption spectrum of single molecules of pentacene in p-terphenyl crystals can be measured by (1) using laser FM spectroscopy combined with Stark and/or ultrasonic double modulation (to remove residual amplitude modulation) and (2) recording spectra far out in the wings of the inhomogeneous line to reduce the number of molecules in resonance to one.