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Your search keyword '"Chen Z. -C."' showing total 3 results
Start Over Author "Chen Z. -C." Topic microfabrication
3 results on '"Chen Z. -C."'

1. FABRICATION AND CHARACTERIZATION OF BROADBAND TERAHERTZ WIRE-GRID POLARIZER.

Author

CHEN, Z. C., HONG, M. H., and CHONG, T. C.

Subjects
*MICROFABRICATION, *BROADBAND communication systems, *POLARIZERS (Light), *SUBSTRATES (Materials science), *TERAHERTZ spectroscopy, *PERFORMANCE evaluation, *RADIO frequency
Abstract

A wire-grid terahertz polarizer fabricated on quartz substrate working in broadband is demonstrated. The transmission spectra of the fabricated wire-grid polarizer are characterized by terahertz time domain spectroscopy, showing the good performance of this polarizer in the terahertz frequency range up to 3.5 THz. The transmission of the peak in the time domain is 80% when the incident terahertz wave polarization is perpendicular to the wire-grid. The transmission of the peak is lower than 10% when the incident polarization is parallel to the wire-grid. The polarization factor ranges from 0.92-0.99 with the mean value of 0.97 in the frequency range from 0.1 to 3.5 THz, which is better than that of the free-standing wire-grid polarizer. [ABSTRACT FROM AUTHOR]

Published
2010
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2. Parallel laser microfabrication of terahertz metamaterials and its polarization-dependent transmission property.

Author

Chen, Z. C., Hong, M. H., Dong, H., Gong, Y. D., Lim, C. S., Shi, L. P., and Chong, T. C.

Subjects
*LASERS, *MICROFABRICATION, *TRANSMISSION electron microscopy, *RESONATORS, *TERAHERTZ spectroscopy, *MANUFACTURING processes
Abstract

Large-area split ring resonator (SRR) array was fabricated by femtosecond laser micro-lens array lithography at a fast speed. Transmission spectra of the SRR arrays at different incident terahertz wave polarization states were characterized by terahertz time domain spectroscopy. A polarization-dependent transmission property of the SRR array was observed. Polarization-dependent loss (PDL) spectrum was characterized to investigate the polarization properties of the terahertz metamaterials. The PDL characterization can eliminate the substrate effect and provide a flexible platform to study the characteristics of free-standing terahertz metamaterials. [ABSTRACT FROM AUTHOR]

Published
2010
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3. Parallel laser microfabrication of large-area asymmetric split ring resonator metamaterials and its structural tuning for terahertz resonance.

Author

Chen, Z. C., Hong, M. H., Lim, C. S., Han, N. R., Shi, L. P., and Chong, T. C.

Subjects
*METAMATERIALS, *ELECTROMAGNETIC fields, *FEMTOSECOND lasers, *MICROFABRICATION, *INDUSTRIAL lasers
Abstract

Large-area asymmetric split ring resonator (ASRR) arrays are fabricated by femtosecond laser microlens array lithography. The double square ASRR consists of two gaps at the outer edge. The resonance properties of this ASRR under structural symmetry breaking conditions are investigated in the terahertz region by changing gap size at one side. The resonance of the ASRR shows blueshift from 0.85 to 0.98 THz when the one gap size increases from 2 to 14 μm. Numerical simulations reveal that the electric field enhancement at the fixed gap increases from 152 to 206 times as the degree of asymmetry increases. [ABSTRACT FROM AUTHOR]

Published
2010
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