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engineering hybrid guided modes in subwavelength uniaxial metamaterial waveguides
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نویسنده
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zhao huijun ,zhang junchao ,wang guanghui
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منبع
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plasmonics - 2017 - دوره : 12 - شماره : 2 - صفحه:245 -255
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چکیده
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We report anomalous dispersion properties of hybrid guided modes (hgms) and their group velocity in a subwavelength uniaxial metamaterial waveguide with metal cladding. we derive exact dispersion relations and modal fields of hgms by solving eigenvalue equation based on basic electromagnetic field theory in detail. numerical results show that two fundamental hgms and two types of high-order hgms can be excited, and their exciting conditions are clarified. in addition, such hgms can be engineered to belong to normal dispersion or anomalous dispersion. importantly, the hgms be controlled to be forward or backward, and their group velocities be very small in a certain frequency band. these properties make such metamaterial waveguides have many potential applications in integrated optics, information storage and biosensing.
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کلیدواژه
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hybrid guided modes ,metamaterial waveguide ,dispersion equation ,group velocity
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آدرس
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south china normal university, guangdong provincial key laboratory of nanophotonic functional materials and devices, china, south china normal university, guangdong provincial key laboratory of nanophotonic functional materials and devices, china, south china normal university, guangdong provincial key laboratory of nanophotonic functional materials and devices, china
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Authors
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