Absorption bleaching of squarylium dye J aggregates via a two-photon excitation process

Furuki, Makoto; Tian, Minquan; Sato, Yasuhiro; Pu, Lyong Sun; Tatsuura, Satoshi; Abe, Shuji
August 2001
Applied Physics Letters;8/6/2001, Vol. 79 Issue 6
Academic Journal
Squarylium dye J aggregates exhibit ultrafast nonlinear optical response of absorption saturation at the resonant wavelength of 770 nm. We studied the two-photon excitation process of J aggregates. By fluorescence measurement, we found the two-photon absorption band at 1.3 μm, which was different from that of the dye solution at 1.2 μm. Absorption saturation at 770 nm via a two-photon excitation process was observed by two-photon resonant excitation at 1.3 μm and also by off-resonant excitation at 1.55 μm, suggesting the possibility of J aggregates for optical switching materials working at the wavelength used in optical communications. © 2001 American Institute of Physics.


Related Articles

  • Phonon-assisted anti-Stokes excitation of the fluorescence of Mn[sup 2+] ions in the CsMnCl[sub 3]·2H[sub 2]O crystal. Eremenko, V. V.; Fomin, V. I.; Kumosov, V. S. // Low Temperature Physics;Jul2000, Vol. 26 Issue 7, p479 

    We demonstrate that anti-Stokes excitation of Mn[sup 2+] ions in the CsMnCl[sub 3]·2H[sub 2]O crystal can occur through multiphonon addition to the energy of the photons of exciting light. The deficit dE between the energy of the Mn[sup 2+] [sup 4]T[sub 1] exciton and the photon energy of the...

  • Study of the visible emission induced by IR multiple-photon excitation of OsO4. Kompa, K. L.; Lamprecht, H.; Schröder, H.; Puretzky, A. A.; Tyakht, V. V. // Journal of Chemical Physics;2/15/1986, Vol. 84 Issue 4, p2020 

    The visible luminescence induced in the OsO4 molecule by the action of CO2-laser radiation was studied in a wide range of laser fluences (2–1000 J/cm2). A novel approach consisting in separating successive dissociation and fluence was developed experimentally to study the visible emission...

  • Two-photon excitation spectrometer for dilute gases. Kohler, Bryan E.; Spiglanin, Thomas A. // Review of Scientific Instruments;May86, Vol. 57 Issue 5, p874 

    A two-photon excitation spectrometer which can be used with dilute molecular gases is described. The spectrometer is based on a standing wave tunable dye laser synchronously pumped by a mode-locked Ar[sup +] laser. Two-photon excitation is enhanced in two ways. First, excitation is carried out...

  • Determination of orientation of the ground state using two-photon nonresonant excitation. Kummel, Andrew C.; Sitz, Greg O.; Zare, Richard N. // Journal of Chemical Physics;6/1/1988, Vol. 88 Issue 11, p6707 

    A method is presented for determining the population A{0}0+, the alignment factors A{2}q± and A{4}q ±, and the orientation factors A{1}q± and A{3}q± for a ground state distribution of diatomic (symmetric top) molecules probed by elliptically polarized two-photon nonresonant...

  • Theory of the phonon perturbed photon echo experiment: Direct determination of electronic excitation–phonon coupling. Wilson, William L.; Wäckerle, G.; Fayer, M. D. // Journal of Chemical Physics;3/15/1988, Vol. 88 Issue 6, p3407 

    A theory is presented describing the proposed phonon perturbed photon echo experiment. This experiment is a combination of picosecond time scale stimulated Raman pumping and photon echo experiments. The theory demonstrates that the phonon perturbed photon echo can directly measure electronic...

  • Evidence for braggoriton excitations in opal photonic crystals infiltrated with highly polarizable dyes. Eradat, N.; Sivachenko, A. Y.; Raikh, M. E.; Vardeny, Z. V.; Zakhidov, A. A.; Baughman, R. H. // Applied Physics Letters;5/13/2002, Vol. 80 Issue 19, p3491 

    We studied angle-dependent reflectivity spectra of opal photonic crystals infiltrated with cyanine dye aggregates, which are highly polarizable media with very large Rabi frequency. We show that, at resonance condition between the exciton-polariton of the dye aggregate and the Bragg gap, the...

  • Three-dimensional focal spots related to two-photon excitation. Sun, Hong-Bo; Tanaka, Tomokazu; Kawata, Satoshi // Applied Physics Letters;5/20/2002, Vol. 80 Issue 20, p3673 

    We used a photopolymer consisting of urethane acrylate monomer and free-radical-type initiators as a media for recording two-photon-excited (TPE) focal spots in three dimensions. Mathematically, the initiator plays a role of "k √" operator, transforming the quadratic light intensity...

  • The excited state dynamics of triplet 1,8-dichloroanthraquinone in solutions at room temperature. Hamanoue, Kumao; Nakayama, Toshihiro; Shiozaki, Masaya; Funasaki, Yasutaka; Nakajima, Kazuo; Teranishi, Hiroshi // Journal of Chemical Physics;11/15/1986, Vol. 85 Issue 10, p5698 

    The transient absorption spectra of the title compound (1,8-DCAQ) in solutions at room temperature have been measured by the picosecond laser photolysis, and the buildup and decay of a new absorption were observed on a picosecond time scale. The decay of this absorption was accompanied by a rate...

  • Excited state absorption of Sm2+ in SrF2 and SrCl2. Payne, Stephen A.; Chase, L. L.; Krupke, William F.; Boatner, L. A. // Journal of Chemical Physics;6/1/1988, Vol. 88 Issue 11, p6751 

    The excited state absorption spectrum of Sm2+ diluted as an impurity in the single crystal hosts SrF2 and SrCl2 has been observed. The absorption peaks associated with the 5D0(4f6) excited state were found to be displaced by approximately 3000 cm-1 from the absorption bands arising from the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics