Abstract

The use of the thermal lens method is shown to be quite suitable for kinetic studies of quenching on a submicrosecond time scale. The lower limit of time resolution that can be achieved is determined by the acoustic transit time, τ_a, in the medium. A thermal lens signal with a 100-ns time constant due to the quenched triplet state of benzophenone is readily measured. The thermal lens method is superior to the photoacoustic (PA) method in the breadth of the accessible time range, and in the significantly fewer measurements required to obtain accurate data, including no requirement for a reference sample; it is also less sensitive to geometrical and laser power requirements than is the PA method.

Submicrosecond temperature measurement in liquid water with laser-induced thermal acoustics

David W. Alderfer, G. C. Herring, Paul M. Danehy, Toshiharu Mizukaki, and Kazuyoshi Takayama
Appl. Opt. 44(14) 2818-2826 (2005)

Time-resolved flow-velocity and concentration measurements using a traveling thermal lens

H. Sontag and A. C. Tam
Opt. Lett. 10(9) 436-438 (1985)

Time-resolved crossed-beam thermal lens measurement as a nonintrusive probe of flow velocity

Wayne A. Weimer and Norman J. Dovichi
Appl. Opt. 24(18) 2981-2986 (1985)

Accuracy and Sensitivity of the Thermal Lens Method for Measuring Absorption

Domenico Solimini
Appl. Opt. 5(12) 1931-1939 (1966)

Eclipsing thermal lens spectroscopy for fluorescence quantum yield measurement

C. Estupiñán-López, C. Tolentino Dominguez, and R. E. de Araujo
Opt. Express 21(15) 18592-18601 (2013)