TY - JOUR
T1 - Plasmon-induced transparency in an air–dielectric grooved parallel-plate terahertz waveguide
AU - Dhriti, K. M.
AU - Islam, Maidul
AU - Bhattacharya, Angana
AU - Ahmad, Amir
AU - Kumar, Gagan
N1 - Funding Information:
Acknowledgment. Author KMD would like to thank MHRD, Government of India for a research fellowship. Author GK would like to acknowledge the financial support from SERB.
Publisher Copyright:
© 2021 Optical Society of America
PY - 2021/4
Y1 - 2021/4
N2 - In this paper, we examine the plasmon-induced transparency (PIT) effect in a parallel-plate waveguide comprising two similar pyramidal-shaped grooves. One of the grooves is filled with air, while the other is filled with a dielectric material whose refractive index can be varied. The resonant frequencies corresponding to the air and dielectric grooves in the proposed configuration result in the transparency window, which can be modulated with the refractive index of the dielectric material. The approach provides flexibility to control the transparency effect in a waveguide configuration without changing the physical dimensions. We examined field profiles in the transparency region to clearly depict the PIT effect. We have employed an analytical model based upon the three-level plasmonic model to validate our numerical findings. Further, we examined the switching and tunability of the transparency effect by including silicon layers between the grooves, whose conductivity can be varied. The tunable response in the PIT effect in terahertz waveguides can be significant in the construction of terahertz waveguide components.
AB - In this paper, we examine the plasmon-induced transparency (PIT) effect in a parallel-plate waveguide comprising two similar pyramidal-shaped grooves. One of the grooves is filled with air, while the other is filled with a dielectric material whose refractive index can be varied. The resonant frequencies corresponding to the air and dielectric grooves in the proposed configuration result in the transparency window, which can be modulated with the refractive index of the dielectric material. The approach provides flexibility to control the transparency effect in a waveguide configuration without changing the physical dimensions. We examined field profiles in the transparency region to clearly depict the PIT effect. We have employed an analytical model based upon the three-level plasmonic model to validate our numerical findings. Further, we examined the switching and tunability of the transparency effect by including silicon layers between the grooves, whose conductivity can be varied. The tunable response in the PIT effect in terahertz waveguides can be significant in the construction of terahertz waveguide components.
UR - http://www.scopus.com/inward/record.url?scp=85104323385&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85104323385&partnerID=8YFLogxK
U2 - 10.1364/JOSAB.420829
DO - 10.1364/JOSAB.420829
M3 - Article
AN - SCOPUS:85104323385
SN - 0740-3224
VL - 38
SP - 1290
EP - 1296
JO - Journal of the Optical Society of America B: Optical Physics
JF - Journal of the Optical Society of America B: Optical Physics
IS - 4
ER -