Reflection of electromagnetic plane wave from a planar chiral nihility-chiral nihility interface ... more Reflection of electromagnetic plane wave from a planar chiral nihility-chiral nihility interface is calculated as a special case of two different chiral media by assuming that permittivities and permeabilities of the both media approach to zero. That is, i → 0, µ i → 0, and chiralities κ i = 0, i = 1, 2. These results are used to find the geometrical optics reflected fields of a cylindrical chiral nihilitychiral nihility interface, when it is excited by a plane wave. Using the Maslov's method, field expression which yields finite values around the focus of cylindrical interface is also determined.
Progress In Electromagnetics Research, Jan 1, 2011
Reflection from a planar DB interface placed in chiral and chiral nihility medium is studied. No ... more Reflection from a planar DB interface placed in chiral and chiral nihility medium is studied. No difference between the two cases, regarding reflection chracteristics, is noted. No reflected backward wave is produced for DB interface placed in chiral nihility metamaterial. In this regard, DB interface may be considered as first known perfect reflector interface which yields non zero power when placed in chiral nihility medium.
Field expressions for guided waves in three-layered fractional dual planar waveguides are derived... more Field expressions for guided waves in three-layered fractional dual planar waveguides are derived by virtue of fractional curl operator. Fractional dual waveguides may be regarded as intermediate steps of the two waveguides which are related through principle of duality. All layers are parallel to the walls of the guide. Middle layer of the waveguide is filled with air however other two layers are filled with chiral nihility metamaterial. Parameter α describes the order of the fractional curl operator. No electric field exists in the chiral nihility layers of the waveguide for α = 0, whereas no magnetic field exists in the chiral nihility layers for α = 1. That is, power flow is confined to only air region of the waveguide for integer values of fractional parameter and corresponding situations have been previously discussed in a published work. In present work, it is noted that, for 0 < α < 1, neither electric field and nor magnetic field is zero inside chiral nihility layers of the fractional dual waveguides. By varying the values of order of the fractional curl operator, one can observe how situation dealing with no electric field changes to situation dealing with no magnetic field. Behavior of fields and power flow in different regions of the fractional waveguides is discussed. It is concluded that, even for fractional dual waveguides, real part of power flow is zero in chiral nihility regions of the waveguides.
The reflection of plane wave from a perfect electromagnetic conductor (PEMC) and fractional dual ... more The reflection of plane wave from a perfect electromagnetic conductor (PEMC) and fractional dual interface placed in a chiral nihility medium is determined. It is noted that for both the cases reflected field is a backward wave. Electric and magnetic fields associated with the reflected wave do not cancel the corresponding electric and magnetic fields associated with the incident wave. It is also noted that in each case time average of the total power yields zero result, that is, the time average of the power incident on the interface cancels the time average of the reflected power. Chiral nihility waveguides, in which power may be confined to certain regions of the waveguide, are proposed.
Reflection of electromagnetic plane wave from a planar chiral nihility-chiral nihility interface ... more Reflection of electromagnetic plane wave from a planar chiral nihility-chiral nihility interface is calculated as a special case of two different chiral media by assuming that permittivities and permeabilities of the both media approach to zero. That is, i → 0, µ i → 0, and chiralities κ i = 0, i = 1, 2. These results are used to find the geometrical optics reflected fields of a cylindrical chiral nihilitychiral nihility interface, when it is excited by a plane wave. Using the Maslov's method, field expression which yields finite values around the focus of cylindrical interface is also determined.
Progress In Electromagnetics Research, Jan 1, 2011
Reflection from a planar DB interface placed in chiral and chiral nihility medium is studied. No ... more Reflection from a planar DB interface placed in chiral and chiral nihility medium is studied. No difference between the two cases, regarding reflection chracteristics, is noted. No reflected backward wave is produced for DB interface placed in chiral nihility metamaterial. In this regard, DB interface may be considered as first known perfect reflector interface which yields non zero power when placed in chiral nihility medium.
Field expressions for guided waves in three-layered fractional dual planar waveguides are derived... more Field expressions for guided waves in three-layered fractional dual planar waveguides are derived by virtue of fractional curl operator. Fractional dual waveguides may be regarded as intermediate steps of the two waveguides which are related through principle of duality. All layers are parallel to the walls of the guide. Middle layer of the waveguide is filled with air however other two layers are filled with chiral nihility metamaterial. Parameter α describes the order of the fractional curl operator. No electric field exists in the chiral nihility layers of the waveguide for α = 0, whereas no magnetic field exists in the chiral nihility layers for α = 1. That is, power flow is confined to only air region of the waveguide for integer values of fractional parameter and corresponding situations have been previously discussed in a published work. In present work, it is noted that, for 0 < α < 1, neither electric field and nor magnetic field is zero inside chiral nihility layers of the fractional dual waveguides. By varying the values of order of the fractional curl operator, one can observe how situation dealing with no electric field changes to situation dealing with no magnetic field. Behavior of fields and power flow in different regions of the fractional waveguides is discussed. It is concluded that, even for fractional dual waveguides, real part of power flow is zero in chiral nihility regions of the waveguides.
The reflection of plane wave from a perfect electromagnetic conductor (PEMC) and fractional dual ... more The reflection of plane wave from a perfect electromagnetic conductor (PEMC) and fractional dual interface placed in a chiral nihility medium is determined. It is noted that for both the cases reflected field is a backward wave. Electric and magnetic fields associated with the reflected wave do not cancel the corresponding electric and magnetic fields associated with the incident wave. It is also noted that in each case time average of the total power yields zero result, that is, the time average of the power incident on the interface cancels the time average of the reflected power. Chiral nihility waveguides, in which power may be confined to certain regions of the waveguide, are proposed.
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