Esakkimuthu Manikandan, Balakrishnapillai S. Sreeja, Sankararajan Radha, Muthukannan Duraiselvam, Abhishek Gupta, Shriganesh Prabhu,
https://www.spiedigitallibrary.org/journals/Optical-Engineering/volume-58/issue-1/011007/Microfabrication-of-terahertz-frequency-selective-surface-by-short--and/10.1117/1.OE.58.1.011007.short?SSO=1
This paper presents the method of fabricating a
frequency-selective surface (FSS) filter for terahertz frequency by short- and
ultrashort laser ablation process. The FSS consists of a capacitive screen made
up of the copper metallic structure supported by a Teflon dielectric substrate.
The dielectric properties of the Teflon substrate at terahertz frequencies were
evaluated using THz-time-domain spectroscopy technique. The numerical
simulation of the designed structure was performed using Computer Simulation
Technology microwave studio software with unit cell configurations and the
resonance was observed at 0.135 THz. The desired metallic microstructure
was created in copper using an 8-ns solid-state Nd: YAG and 150 fs
Ti:sapphire laser operating at the second harmonic wavelength of 532 and
800 nm, respectively. The proposed structure provides
polarization-independent operation. The experimental verification of the
fabricated FSS using femtosecond ablation process was done using THz-TDS
technique, and it is observed that the measured data well match with the
simulated result.
No comments:
Post a Comment