https://doi.org/10.1140/epjb/e2012-30038-x
Regular Article
Tunable bandpass filters based on one-dimensional bilayer period structure composed of single-negative materials
1
School of Scinece, Nanchang University,
Nanchang
330031, P.R.
China
2
State Key Laboratory of Millimeter Waves, Southeast
University, Nanjing
210096, P.R.
China
3
State Key Laboratory of Optoelectronic Materials and
Technologies, Sun Yat-sen
Unversity, Guangzhou
510275, P.R.
China
4
Institute for Advanced Study, Nanchang University,
Nanchang
330031, P.R.
China
a e-mail: xhdengxh@yahoo.com.cn
Received:
13
January
2012
Received in final form:
1
May
2012
Published online:
3
July
2012
Polarization-independent and omnidirectional tunable bandpass filters have been proposed and demonstrated. It is seen that a bilayer period structure composed of single-negative materials can act as a tunable filter, which can be changed from a filter with two symmetrical passband to one with a single pass bandpass, or from one with a wide to one with a narrow pass band. Moreover, the proposed filter is insensitive to the incident angle and polarization of light, which is an omnidirectional, polarization-independent filter for incidence angles between 0° to 90°.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2012