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Моделирование фокусировки фемтосекундного импульса эллипсоидом, параболоидом, сферой и полусферой

Моделирование фокусировки фемтосекундного импульса эллипсоидом, параболоидом, сферой и полусферой

Abstract

Численное моделирование FDTD-методом показало, что при фокусировке двух линейно поляризованных импульсов длительностью 1,24 фс и 2,98 фс (с плоским волновым фронтом и центральной длиной волны 532 нм) с помощью кварцевой микросферы с диаметром 2 мкм не происходит временного уширения импульсов, а пространственное уширение немного больше для менее короткого импульса. В отличие от сферы при фокусировке полусферой, параболоидом и эллипсоидом (все с максимальным сечением диаметром 2 мкм) пространственное и временное уширение импульсов происходит нормальным образом: более короткий импульс уширяется больше, чем менее короткий.

Numerical simulation of FDTD-method showed that it is not temporarily broadening of pulses and spatial broadening a little more for less short pulse in case of focusing two linearly polarized pulses of 1,24 fs and 2,98 fs (with a plane wavefront and a central wavelength of 532 nm) by silica microspheres with a diameter of 2 µm. In contrast, spatial and temporal broadening of the pulse is in the normal way: a shorter pulse broadens more than less short in the case of by focusing by hemisphere, the paraboloid and ellipsoid (all with maximum cross-section diameter of 2 µm).

Keywords

FDTD-МЕТОД, МИКРООПТИКА, ФЕМТОСЕКУНДНЫЙ ИМПУЛЬС, ОСТРАЯ ФОКУСИРОВКА СВЕТА, МИКРОСФЕРА, МИКРОЭЛЛИПСОИД, МИКРОПАРАБОЛОИД, МИКРОЛИНЗА, ДИСПЕРСИОННАЯ МОДЕЛЬ СЕЛЛМЕЙЕРА, THE SELMEYER’S DISPERSION MODEL

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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