Two-photon-absorption properties of multipolar molecules studied using femtosecond z-scan method
Two-photon-absorption properties of multipolar molecules studied using femtosecond z-scan method
- 주제(키워드) Femtosecondz-scan , Two-photon absorption , Multipolar molecule
- 발행기관 한국물리학회
- 발행년도 2004
- 총서유형 Journal
- UCI G704-001115.2004.4.6.005
- KCI ID ART000970709
- 본문언어 영어
초록/요약
Two-photon-absorption (TPA) properties of multipolar molecules were studied using femtosecondz-scan method. We measuredthez-scan curves at 800 nm, 1 kHz using 150 fs-laser pulse. Thez-scan curves were measured for two kinds of multipolar molecules:three dierent quadrupole molecules (Q1, Q2, Q3) and three dierent octupolar molecules (O1, O2, O3). Each multipolar moleculehas same molecular skeleton but the lengths of the dipolar subunits or the donor strengths are dierent each other. Their TPA cross-sections were obtained from the magnitudes of the transmittance dip in the measuredz-scan curves: 233 (Q1), 127 (Q2), 164 (Q3) and381 (O1), 230 (O2), 85 (O3) cm4/(photon/s) for quadrupole and octupolar molecules, respectively. These results are ascribed to thefact that TPA cross-sections of the multipolar molecules are raised by increasing the number of the alternating double bonds in thedipolar subunits or by enlarging the electron-donating strength of the substituent.
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