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Based on the temperature-dependent complex dielectric constant of indium antimonide, an InSb-dielectric-InSb plasmonic waveguide structure with the grating was realized. At the frequency of 1 THz, a directional beam was obtained, and its radiation direction can be controlled by changing the temperature difference between the grating structures on each side. Finite difference time domain (FDTD) method was adopted to evaluate the relationship between the off-axis angle of the beam and the temperature difference. The tunable directional beaming can be attributed to the grating coupling of the TM surface modes in plasmonic waveguides.
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Keywords:
- surface plasmon /
- terahertz /
- finite difference time domain /
- beam direction control
[1] Lezec H J, Degiron A, Devaux E, Linke R A, Martin-Moreno L, Garcia-Vidal F J, Ebbesen T W 2002 Science 297 820
[2] Zheng G G, Li X Y 2009 J. Opt. A: Pure Appl. Opt. 11 075002
[3] Kim H, Park J, Lee B 2009 Opt. Lett. 34 2569
[4] Gomez Rivas J, Bolivar P H, Kurz H 2004 Opt. Lett. 29 1680
[5] Hua L, Song G F, Guo B S, Wang W M, Zhang Y 2008 Acta Phys. Sin. 57 7210 (in Chinese) [花 磊、 宋国峰、 郭宝山、 汪卫敏、 张 宇 2008 57 7210]
[6] Hendry E, Garcia-Vidal F J, Martin-Moreno L, Gomez Rivas J, Bonn M, Hibbins A P, Lockyear M J 2008 Phy. Rev. Lett. 100 123901
[7] Hu B, Gu B Y, Zhang Y, Liu M 2009 Appl. Phys. Lett. 95 121103
[8] Yin H P, Hui P M 2009 Appl. Phys. Lett. 95 011115
[9] Gomez Rivas J, Schotsch C, Bolivar P H, Kurz H 2003 Phys. Rev. B 68 201306(R)
[10] Gomez Rivas J, Janke C, Bolivar P H, Kurz H 2005 Opt. Express 13 847
[11] Madelung O 1964 Physics of III-V compounds (New York: John Wiley& Sons, Inc.) p111
[12] Ma C S, Liu S Y 2007 Theory of optical waveguide modes (Changchun: Jilin University Press) p246 (in Chinese) [马春生、 刘式墉 2007 光波导模式理论 (长春:吉林大学出版社) 第246页]
[13] Yu L B, Lin D Z, Chen Y C, Chang Y C, Huang K T, Liaw J W, Yeh J T, Liu J M, Yeh C S, Lee C K 2005 Phys. Rev. B 71 041405 (R)
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[1] Lezec H J, Degiron A, Devaux E, Linke R A, Martin-Moreno L, Garcia-Vidal F J, Ebbesen T W 2002 Science 297 820
[2] Zheng G G, Li X Y 2009 J. Opt. A: Pure Appl. Opt. 11 075002
[3] Kim H, Park J, Lee B 2009 Opt. Lett. 34 2569
[4] Gomez Rivas J, Bolivar P H, Kurz H 2004 Opt. Lett. 29 1680
[5] Hua L, Song G F, Guo B S, Wang W M, Zhang Y 2008 Acta Phys. Sin. 57 7210 (in Chinese) [花 磊、 宋国峰、 郭宝山、 汪卫敏、 张 宇 2008 57 7210]
[6] Hendry E, Garcia-Vidal F J, Martin-Moreno L, Gomez Rivas J, Bonn M, Hibbins A P, Lockyear M J 2008 Phy. Rev. Lett. 100 123901
[7] Hu B, Gu B Y, Zhang Y, Liu M 2009 Appl. Phys. Lett. 95 121103
[8] Yin H P, Hui P M 2009 Appl. Phys. Lett. 95 011115
[9] Gomez Rivas J, Schotsch C, Bolivar P H, Kurz H 2003 Phys. Rev. B 68 201306(R)
[10] Gomez Rivas J, Janke C, Bolivar P H, Kurz H 2005 Opt. Express 13 847
[11] Madelung O 1964 Physics of III-V compounds (New York: John Wiley& Sons, Inc.) p111
[12] Ma C S, Liu S Y 2007 Theory of optical waveguide modes (Changchun: Jilin University Press) p246 (in Chinese) [马春生、 刘式墉 2007 光波导模式理论 (长春:吉林大学出版社) 第246页]
[13] Yu L B, Lin D Z, Chen Y C, Chang Y C, Huang K T, Liaw J W, Yeh J T, Liu J M, Yeh C S, Lee C K 2005 Phys. Rev. B 71 041405 (R)
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