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  • World Scientific Pub Co Pte Ltd  (2)
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  • World Scientific Pub Co Pte Ltd  (2)
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  • 1
    Online Resource
    Online Resource
    ROTATIONAL PROPERTIES OF MICRO-SLABS DRIVEN BY LINEARLY-POLARIZED LIGHT
    World Scientific Pub Co Pte Ltd ; 2005
    In:  Journal of Nonlinear Optical Physics & Materials Vol. 14, No. 03 ( 2005-09), p. 375-382
    Details
    In: Journal of Nonlinear Optical Physics & Materials, World Scientific Pub Co Pte Ltd, Vol. 14, No. 03 ( 2005-09), p. 375-382
    Abstract: We study the rotational motion of objects trapped in a focused laser beam (optical tweezers). Micrometer-sized flat slabs are fabricated using two-photon photopolymerization. These objects, trapped by linearly-polarized light, tend to align parallel to the polarization plane. This alignment effect is attributed to the polarization anisotropy resulting from the object shape and we present a simple electromagnetic approach to estimate the resulting optical torque. Micro-rotors of different sizes are studied experimentally. We characterize the behavior of micro-objects when the light polarization is rotated at constant speed. Our theoretical approach gives a good prediction of how the size of micro-objects affects their rotation efficiency.
    Type of Medium: Online Resource
    ISSN: 0218-8635 , 1793-6624
    URL: Article
    DOI: 10.1142/S0218863505002815
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2005
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  • 2
    Online Resource
    Online Resource
    DENDRITIC FLUORENE OLIGOMERS FOR NONLINEAR ABSORPTION IN THE VISIBLE RANGE
    World Scientific Pub Co Pte Ltd ; 2005
    In:  Journal of Nonlinear Optical Physics & Materials Vol. 14, No. 03 ( 2005-09), p. 311-318
    Details
    In: Journal of Nonlinear Optical Physics & Materials, World Scientific Pub Co Pte Ltd, Vol. 14, No. 03 ( 2005-09), p. 311-318
    Abstract: We report here the nonlinear absorption properties of dendritic molecules of oligofluorenes. Measurements were performed in chloroform between 450 and 650 nm for nanosecond time duration pulses. The nonlinear absorption is attributed to a three-photon absorption process involving first a two-photon absorption (TPA) step followed by an excited state absorption (ESA) process. The corresponding three-photon absorption coefficient α 3 presents at resonance high values (α 3 〉 10000 cm 3 / GW 2 for 2G1 the first dendrimer generation bearing a bifluorene at a concentration of 50 g/L). These values are strongly enhanced with respect to those obtained in the same conditions for analog linear oligofluorenes.
    Type of Medium: Online Resource
    ISSN: 0218-8635 , 1793-6624
    URL: Article
    DOI: 10.1142/S021886350500275X
    Language: English
    Publisher: World Scientific Pub Co Pte Ltd
    Publication Date: 2005
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
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