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Relation between Airy beams and triple-cusp beams

Chinese Physics B 2014年第8期23卷 333-339页

作者：任志君李晓东金洪震陈晨吴疆苗 Institute of Information Optics Zhejiang Normal University Joint Research Laboratory of Optics of Zhejiang Normal University and Zhejiang University

Airy beams and triple-cusp beams are two kinds of accelerating beams. The propagation characteristics and internal topological structures of accelerating Airy beams are well understood because of the developed mathematical theory about Airy function. However, limited information is available about the optical characteristics of accelerating triple-cusp beams. In this work, the relationship between Airy beams and triple-cusp beams is examined theoretically and experimentally. Results reveal some important optical characteristics of triple-cusp beams based on the optical characteristics of Airy beams. These findings are expected to provide a foundation for future applications of triple-cusp beams.

关键词： Airy beams triple-cusp beams beam characteristics

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Generation of a blue-detuned optical storage ring by a metasurface and its application in optical trapping of cold molecules

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Chinese Physics B 2023年第2期32卷 229-235页

作者：凌晨尹亚玲刘泱李林夏勇 State Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

A scheme for storage of cold molecules in a hollow optical ring generated by a metasurface grating is *** characteristics and intensity distribution related to the ring’s structural parameters and fabrication error tolerance are theoretically studied. The optical potential and dipole force required for the ring to trap magnesium monofluoride(MgF)molecules are also calculated. The dynamic behavior of MgF molecules in the storage ring is simulated by a Monte Carlo method, which shows that a metasurface-based optical storage ring can be used to trap molecules and is an interesting platform for research into ultracold quantum gases and their quantum-state manipulation.

关键词： metamaterials beam characteristics trapping of molecules

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Photonic crystal structures:beam deflector and beam router

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Chinese Physics B 2018年第4期27卷 320-326页

作者： Utku Erdiven Erkan Tetik Faruk Karadag Department of Physics Arts and SciencesCukurova University Computer Education and Instructional Technology Department of EducationUsak University

We investigate the optical characteristic,transverse magnetic（TM） and transverse electric（TE） band of twodimensional（2 D） square lattice photonic crystal structure,which is composed of cylindrical air regions positioned at the corners of the square shaped dielectric *** obtain the wide photonic bandwidths between TM1–TM2 and TM3–TM4 *** to the results,we demonstrate the band gaps close to each other in the TM and TE frequencies for proposed *** resulting photonic gaps are formed to be about 8% at the higher frequencies of TE modes（TE4–TE5）and TM modes（TM7–TM8 and TM9–TM10）.In addition,we examine isotropically generated structures for light guiding properties and observe that the light is directed in a particular route without using any *** also investigate the self-collimation effect with the designed *** obtained results reveal the influences of the radius of cylindrical air holes and the angle between these air holes on absolute and partial photonic band ***,we observe the TM and TE band gaps that *** is thought that the obtained band overlap will provide an easy way to produce the photonic crystals in practical applications like photonic insensitive *** is also believed that these results can provide the photonic crystal structures to work as a beam deflecting and beam router in integrated optical circuit applications.

关键词： photonic bandgap materials electromagnetic wave propagation beam characteristics

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