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Masia, Francesco; Langbein, Wolfgang Werner; Borri, Paola (2009)
Publisher: Wiley-Blackwell
Languages: English
Types: Article
Subjects:
We demonstrate a novel imaging modality based on the detection of resonant four-wave mixing emitted by colloidal quantum dots. This third-order signal is excited and detected at a visible wavelength in resonance with an electronic transition, and results in a significant improvement of the spatial resolution with respect to a twophoton fluorescence microscope.\ud \ud In particular, we have investigated the dependence of the transient reduced absorption of the sample induced by the illumination (photobleaching) on the exposure time and excitation intensity, and its influence to the fourwave mixing signal.
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    • [1] See a review on biological optical imaging in: Science 300 (2003).
    • [2] M. Bruchez, M. Moronne, P. Gin, S. Weiss, and A. Alivisatos, Science 281, 2013 (1998).
    • [3] X. Michalet, F. Pinaud, T. Lacoste, M. Dahan, M. P. Bruchez, A. Alivisatos, and S. Weiss, Single Mol. 4, 261 (2001).
    • [4] X. Michalet, F. F. Pinaud, L. A. Bentolila, J. M. Tsay, S. Doose, J. J. Li, G. Sundaresan, A. M. Wu, S. S. Gambhir, and S. Weiss, Science 307, 538 (2005).
    • [5] J. Klostranec and W. Chan, Adv. Mater. 18, 1953 (2006).
    • [6] A. Alivisatos, Science 271, 933 (1996).
    • [7] W. C. W. Chan and S. Nie, Science 281, 2016 (1998).
    • [8] W. Denk, J. Strickler, and W. Webb, Science 248, 73 (1990).
    • [9] D. Larson, W. Zipfel, R. Williams, S. Clark, M. Bruchez, F. Wise, and W. Webb, Science 300, 1434 (2003).
    • [10] D. Mittleman, R. Schoenlein, J. Shiang, V. Colvin, A. Alivisatos, and C. Shank, Phys. Rev. B 49, 14435 (1994).
    • [11] Y. Sun, P. Borri, F. Masia, and W. Langbein, unpublished.
    • [12] P. Borri and W. Langbein, J. Phys.: Condens. Matter 19, 295201 (2007).
    • [13] F. Masia, P. Borri, and W. Langbein, unpublished.
    • [14] J. Shah, Ultrafast Spectroscopy of Semiconductors and Semiconductor Nanostructures (Springer, Berlin, 1996).
    • [15] R. W. Boyd, Nonlinear Optics (Elsevier, 2003).
    • [16] In the experiment the ratio between P1 and P2 power densities is kept constant to 0.5 to have the same condition in the study of the transient FWM.
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