Limitations Arising from Two-Photon Absorption of Solvent in Pulsed-Laser Thermal Lens Detection: Determination of the Two-Photon Absorption Coefficient of Ethanol at 266 nm

Abstract

Two-photon absorption of the solvent under pulsed-laser excitation at 266 nm produces a high background thermal lens signal interfering with the analyte signal. Discrimination of both solvent and analyte signals along with calibration of the photothermal response has allowed the determination of the two-photon absorption coefficient of ethanol. The obtained value, 3.0 × 10⁻¹⁰ cm W⁻¹, is close to the literature values obtained from transmittance measurements using picosecond or femtosecond laser pulses.

Keywords

Thermal lens spectrometry Pulsed laser Two-photon absorption coefficient Ethanol

Get full access to this article

View all access options for this article.

References

Ghaleb

K. Abbas

and Georges

, Spectrochim. Acta, Part A 60, 2793 (2004).

Seidel

B. S.

Faubel

and Ache

H. J

, J. Biomed. Opt. 2, 326 (1997).

Ragozina

Heissler

Faubel

and Pyell

, Anal. Chem. 74, 4480 (2002).

Ragozina

Putz

Heissler

Faubel

and Pyell

, Anal. Chem. 76, 3804 (2004).

Kettler

C. N.

and Sepaniak

M. J

, Anal. Chem. 59, 1733 (1987).

Nickolaisen

S. L.

and Bialkowski

S. E

, Anal. Chem. 58, 215 (1986).

Waldron

K. C.

and Dovichi

N. J

, Anal. Chem. 64, 1396 (1992).

Waldron

K. C.

and Li

J.-J

, J. Chromatogr., B 683, 47 (1996).

Ghaleb

K. Abbas

and Georges

, Spectrochim. Acta, Part A 60, 863 (2004).

10.

Twarowski

A. J.

and Kliger

D. S

, Chem. Phys. 20, 253 (1977).

11.

Fang

H. L.

and Swofford

R. L

, in Ultrasensitive Laser Spectroscopy, Kliger

D. S.

Ed. (Academic Press, New York, 1983), pp. 176–223.

12.

Dragonmir

McInerney

J. G.

and Nikogosyan

D. N

, Appl. Opt. 41, 4365 (2002).

13.

Ghaleb

K. Abbas

and Georges

, Appl. Spectrosc. 58, 1116 (2004).

14.

Nikogosyan

D. N.

Oraevsky

A. A.

and Rupasov

V. I

, Chem. Phys. 77, 131 (1983).