Changes of intensity distribution of a tightly focused plane-wave pulse induced by lens dispersion |
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Authors: | Yiming Dong Fei Wang |
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Affiliation: | 1. College of Physics, Optoelectronics and Energy &2. Collaborative Innovation Center of Suzhou NanoScience and Technology, Soochow University, Suzhou, China;3. Department of Physics, Shaoxing University, Shaoxing, China |
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Abstract: | The tightly focusing properties of a linearly polarized plane-wave pulse through a high numerical aperture (NA) lens with dispersion are formulated. The effects of lens dispersion on the tightly focused intensity distribution in the focal region are studied in detail. It is found that, because of the lens dispersion, the intensity of the side lobe of the focused light spot strengthens in the transverse direction and the size of the main lobe of the focused light spot increases in the longitudinal direction as the pulse duration decreases. In addition, we compare the effects of dispersion of lens made by different types of glass on tightly focusing properties of a pulse beam. The results will be helpful to choose suitable high NA objective lens in experiment. |
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Keywords: | Tightly focusing pulse dispersion |
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