THz Bandpass Filter Design Using
Metamaterial-Based Defected 1D
Photonic Crystal Structure
Arpan Deyasi and Angsuman Sarkar
Abstract In the present chapter, bandpass filter in THz spectra is designed using
defected one-dimensional structure where the central wavelength is chosen at
1550 nm. Double negative index materials, i.e. metamaterials are considered for
filter design which is already a proved candidate for providing better SNR in planar antenna than the known positive index materials; intentionally pint defects are
considered within the structure which improves the amount in ripple in passband
and makes the guard bands sharper compared with defect-free ideal structure. Along
with normal incidence, oblique incidences are also taken into account within a limited range of incidence angle for estimation of filter properties where both TM and
TE modes of propagations are analysed. Result speaks in favour of paired nanorod
structure for gradual variation of bandwidth, however, for higher operating frequency
range; nanofishnet with elliptic void is favoured.
Keywords Metamaterial · Bandpass filter · Photonic crystal · THz spectrum ·
Oblique incidence · Defected structure
1 Introduction
Progress in applied physics related to the field of optoelectronic devices and systems
is rapidly replaced by all-photonic counterparts, precisely due to the characteristic of lower noise, higher operating speed [1, 2], lower attenuation loss, coherency
and large bandwidth [3, 4]. The physical realization of photonic integrated circuit
becomes possible due to the fabrication of photonic crystal undoubtedly can be
termed as the building block of optical devices [5]. This structure has the unique
A. Deyasi (B)
Department of Electronics and Communication Engineering, RCC Institute of Information
Technology, Kolkata 700015, India
e-mail: deyasi_arpan@yahoo.co.in
A. Sarkar (B)
Department of Electronics and Communication Engineering, Kalyani Govt. Engineering College,
Nadia 741235, India
e-mail: angsumansarkar@ieee.org
© Springer Nature Singapore Pte Ltd. 2020
A. Biswas et al. (eds.), Emerging Trends in Terahertz Solid-State Physics and Devices,
https://doi.org/10.1007/978-981-15-3235-1_1
1
Metamaterial-Based Defected 1D
Photonic Crystal Structure
Arpan Deyasi and Angsuman Sarkar
Abstract In the present chapter, bandpass filter in THz spectra is designed using
defected one-dimensional structure where the central wavelength is chosen at
1550 nm. Double negative index materials, i.e. metamaterials are considered for
filter design which is already a proved candidate for providing better SNR in planar antenna than the known positive index materials; intentionally pint defects are
considered within the structure which improves the amount in ripple in passband
and makes the guard bands sharper compared with defect-free ideal structure. Along
with normal incidence, oblique incidences are also taken into account within a limited range of incidence angle for estimation of filter properties where both TM and
TE modes of propagations are analysed. Result speaks in favour of paired nanorod
structure for gradual variation of bandwidth, however, for higher operating frequency
range; nanofishnet with elliptic void is favoured.
Keywords Metamaterial · Bandpass filter · Photonic crystal · THz spectrum ·
Oblique incidence · Defected structure
1 Introduction
Progress in applied physics related to the field of optoelectronic devices and systems
is rapidly replaced by all-photonic counterparts, precisely due to the characteristic of lower noise, higher operating speed [1, 2], lower attenuation loss, coherency
and large bandwidth [3, 4]. The physical realization of photonic integrated circuit
becomes possible due to the fabrication of photonic crystal undoubtedly can be
termed as the building block of optical devices [5]. This structure has the unique
A. Deyasi (B)
Department of Electronics and Communication Engineering, RCC Institute of Information
Technology, Kolkata 700015, India
e-mail: deyasi_arpan@yahoo.co.in
A. Sarkar (B)
Department of Electronics and Communication Engineering, Kalyani Govt. Engineering College,
Nadia 741235, India
e-mail: angsumansarkar@ieee.org
© Springer Nature Singapore Pte Ltd. 2020
A. Biswas et al. (eds.), Emerging Trends in Terahertz Solid-State Physics and Devices,
https://doi.org/10.1007/978-981-15-3235-1_1
1