An unique mask moving method is developed for forming effective micro-optical structures with continuous profile. The mechanism for forming different micro-optical profiles is disclosed, and the designed approach for ...An unique mask moving method is developed for forming effective micro-optical structures with continuous profile. The mechanism for forming different micro-optical profiles is disclosed, and the designed approach for binary moving mask is described. Finally some concrete micro-optical components with typical microstructures are presented for demonstrating the validity of the method.展开更多
Misalignment among stacked layers of absor- bers is inevitable in practice. Adverse effects induced by this undesired factor was investigated and analyzed in this paper. The absorption responses of thin terahertz meta...Misalignment among stacked layers of absor- bers is inevitable in practice. Adverse effects induced by this undesired factor was investigated and analyzed in this paper. The absorption responses of thin terahertz metama- terial （MM） absorber with different degree of misalign- ment were simulated by finite-difference time-domain （FDTD） method under both transverse magnetic （TM） and transverse electric （TE） polarization. Results show that slight misalignment deteriorates absorption response due to the decreased spatial resolution. The analyses are given in terms of the magnetic field distribution in the cross section. In addition, the depravation is changed with polarization, which depends on the direction of excursion.展开更多
A Terahertz sensing method based on the resonant transmission characteristics through metallic aperture arrays is proposed. Here we present metallic aperture arrays of rectangular and H-shaped holes which induce local...A Terahertz sensing method based on the resonant transmission characteristics through metallic aperture arrays is proposed. Here we present metallic aperture arrays of rectangular and H-shaped holes which induce localized resonance. High characterization sensitivity to surface condition is demonstrated. When applied with the liquid of 3-pentanone, arrays of rectangular and H-shaped holes have sensitivity of 158 and 172 GHz/RIU （refractive index unit）, respectively. So the metal meshes based localized resonance can also be used as a sensor chip in terahertz region.展开更多
文摘An unique mask moving method is developed for forming effective micro-optical structures with continuous profile. The mechanism for forming different micro-optical profiles is disclosed, and the designed approach for binary moving mask is described. Finally some concrete micro-optical components with typical microstructures are presented for demonstrating the validity of the method.
基金Acknowledgements This work was supported by the National Basic Research Program of China （Nos. 2013CBA01700 and 2012CB315704）, the National Natural Science Foundation of China （Gram No. 61325023）, and the Funds for the Excellent Ph.D. Dissertation of Southwest Jiaotong University in 2012.
文摘Misalignment among stacked layers of absor- bers is inevitable in practice. Adverse effects induced by this undesired factor was investigated and analyzed in this paper. The absorption responses of thin terahertz metama- terial （MM） absorber with different degree of misalign- ment were simulated by finite-difference time-domain （FDTD） method under both transverse magnetic （TM） and transverse electric （TE） polarization. Results show that slight misalignment deteriorates absorption response due to the decreased spatial resolution. The analyses are given in terms of the magnetic field distribution in the cross section. In addition, the depravation is changed with polarization, which depends on the direction of excursion.
文摘A Terahertz sensing method based on the resonant transmission characteristics through metallic aperture arrays is proposed. Here we present metallic aperture arrays of rectangular and H-shaped holes which induce localized resonance. High characterization sensitivity to surface condition is demonstrated. When applied with the liquid of 3-pentanone, arrays of rectangular and H-shaped holes have sensitivity of 158 and 172 GHz/RIU （refractive index unit）, respectively. So the metal meshes based localized resonance can also be used as a sensor chip in terahertz region.
