Abstract

Hybrid plasmonic waveguides consisting of a high-index slab separated from a metal plane by a low-index spacer provide an optimal compromise between the loss and confinement for surface plasmon waves in passive medium. In such hybrid structures, because power for the TE and TM modes are concentrated in two different regions of the guide, the characteristics of the two modes can be controlled independently by changing the waveguide dimensions. We propose to use this property to implement a hybrid plasmonic polarization-independent directional coupler for a silicon on insulator platform. We also investigate the effects of variations of wavelength and device dimensions on the performance of the proposed device.

© 2012 Optical Society of America

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2012 (1)

2011 (1)

2010 (3)

2009 (1)

2008 (4)

H. Fakuda, K. Yamada, T. Tsuchizawa, T. Watanabe, H. Shinojima, and S. Itabashi, Opt. Express 16, 4872 (2008).
[CrossRef]

V. M. N. Passaro, F. Dell’Olio, B. Timotijevic, and G. Z. Masahnovich, Opt. Lett. 2, 6 (2008).
[CrossRef]

R. F. Oulton, V. J. Sorger, D. A. Genov, D. F. P. Pile, and X. Zhang, Nat. Photon. 2, 496 (2008).
[CrossRef]

R. F. Oulton, G. Bartal, D. F. P. Pile, and X. Zhang, New J. Phys. 10, 105018 (2008).
[CrossRef]

2007 (3)

2006 (1)

1990 (1)

H. Yanagawa, S. Nakamura, I. Ohyama, and K. Ueki, J. Lightwave Technol. 8, 1292 (1990).
[CrossRef]

1972 (1)

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

Aitchison, J. S.

Alam, M. Z.

Bartal, G.

R. F. Oulton, G. Bartal, D. F. P. Pile, and X. Zhang, New J. Phys. 10, 105018 (2008).
[CrossRef]

Berini, P.

Buckley, R.

Christy, R. W.

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

Dai, D.

Dell’Olio, F.

V. M. N. Passaro, F. Dell’Olio, B. Timotijevic, and G. Z. Masahnovich, Opt. Lett. 2, 6 (2008).
[CrossRef]

Dokania, R. K.

R. K. Dokania, in Proceedings of 19th ACM Great Lakes Symposium on VLSI (ACM, 2009), pp. 275–280.

Fakuda, H.

Fujisawa, T.

Genov, D. A.

R. F. Oulton, V. J. Sorger, D. A. Genov, D. F. P. Pile, and X. Zhang, Nat. Photon. 2, 496 (2008).
[CrossRef]

He, S.

Hosseini, A.

A. Hosseini, A. Nieuwoudt, and Y. Massoud, IEEE Photon. Technol. Lett. 19, 522 (2007).
[CrossRef]

Hsu, S.-H.

Huang, D.-W.

Itabashi, S.

Johnson, P. B.

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

Koshiba, M.

Lim, S. T.

Ma, Y.-F.

Masahnovich, G. Z.

V. M. N. Passaro, F. Dell’Olio, B. Timotijevic, and G. Z. Masahnovich, Opt. Lett. 2, 6 (2008).
[CrossRef]

Massoud, Y.

A. Hosseini, A. Nieuwoudt, and Y. Massoud, IEEE Photon. Technol. Lett. 19, 522 (2007).
[CrossRef]

Meier, J.

M. Z. Alam, J. Meier, J. S. Aitchison, and M. Mojahedi, Opt. Express 18, 12971 (2010).
[CrossRef]

M. Z. Alam, J. Meier, J. S. Aitchison, and M. Mojahedi, in Conference on Lasers and Electro-Optics (IEEE, 2007), Paper JThD112.

Mojahedi, M.

Nakamura, S.

H. Yanagawa, S. Nakamura, I. Ohyama, and K. Ueki, J. Lightwave Technol. 8, 1292 (1990).
[CrossRef]

Nieuwoudt, A.

A. Hosseini, A. Nieuwoudt, and Y. Massoud, IEEE Photon. Technol. Lett. 19, 522 (2007).
[CrossRef]

Ohyama, I.

H. Yanagawa, S. Nakamura, I. Ohyama, and K. Ueki, J. Lightwave Technol. 8, 1292 (1990).
[CrossRef]

Ong, E. A.

Oulton, R. F.

R. F. Oulton, G. Bartal, D. F. P. Pile, and X. Zhang, New J. Phys. 10, 105018 (2008).
[CrossRef]

R. F. Oulton, V. J. Sorger, D. A. Genov, D. F. P. Pile, and X. Zhang, Nat. Photon. 2, 496 (2008).
[CrossRef]

Palik, E. D.

E. D. Palik, Handbook of Optical Constants of Solids(Academic, 1985).

Passaro, V. M. N.

V. M. N. Passaro, F. Dell’Olio, B. Timotijevic, and G. Z. Masahnovich, Opt. Lett. 2, 6 (2008).
[CrossRef]

Pile, D. F. P.

R. F. Oulton, G. Bartal, D. F. P. Pile, and X. Zhang, New J. Phys. 10, 105018 (2008).
[CrossRef]

R. F. Oulton, V. J. Sorger, D. A. Genov, D. F. P. Pile, and X. Zhang, Nat. Photon. 2, 496 (2008).
[CrossRef]

Png, C. E.

Shinojima, H.

Sorger, V. J.

R. F. Oulton, V. J. Sorger, D. A. Genov, D. F. P. Pile, and X. Zhang, Nat. Photon. 2, 496 (2008).
[CrossRef]

Sung, M.-J.

Timotijevic, B.

V. M. N. Passaro, F. Dell’Olio, B. Timotijevic, and G. Z. Masahnovich, Opt. Lett. 2, 6 (2008).
[CrossRef]

Tsuchizawa, T.

Ueki, K.

H. Yanagawa, S. Nakamura, I. Ohyama, and K. Ueki, J. Lightwave Technol. 8, 1292 (1990).
[CrossRef]

Watanabe, T.

Yamada, K.

Yanagawa, H.

H. Yanagawa, S. Nakamura, I. Ohyama, and K. Ueki, J. Lightwave Technol. 8, 1292 (1990).
[CrossRef]

Zhang, X.

R. F. Oulton, G. Bartal, D. F. P. Pile, and X. Zhang, New J. Phys. 10, 105018 (2008).
[CrossRef]

R. F. Oulton, V. J. Sorger, D. A. Genov, D. F. P. Pile, and X. Zhang, Nat. Photon. 2, 496 (2008).
[CrossRef]

Appl. Opt. (2)

IEEE Photon. Technol. Lett. (1)

A. Hosseini, A. Nieuwoudt, and Y. Massoud, IEEE Photon. Technol. Lett. 19, 522 (2007).
[CrossRef]

J. Lightwave Technol. (1)

H. Yanagawa, S. Nakamura, I. Ohyama, and K. Ueki, J. Lightwave Technol. 8, 1292 (1990).
[CrossRef]

J. Opt. Soc. Am. B (1)

Nat. Photon. (1)

R. F. Oulton, V. J. Sorger, D. A. Genov, D. F. P. Pile, and X. Zhang, Nat. Photon. 2, 496 (2008).
[CrossRef]

New J. Phys. (1)

R. F. Oulton, G. Bartal, D. F. P. Pile, and X. Zhang, New J. Phys. 10, 105018 (2008).
[CrossRef]

Opt. Express (5)

Opt. Lett. (3)

Phys. Rev. B (1)

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

Other (3)

E. D. Palik, Handbook of Optical Constants of Solids(Academic, 1985).

R. K. Dokania, in Proceedings of 19th ACM Great Lakes Symposium on VLSI (ACM, 2009), pp. 275–280.

M. Z. Alam, J. Meier, J. S. Aitchison, and M. Mojahedi, in Conference on Lasers and Electro-Optics (IEEE, 2007), Paper JThD112.

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Figures (5)

Fig. 1.
Fig. 1.

(a) Top view of the HPWG directional coupler with input and output silicon waveguides. (b) Cross-section of the coupling section.

Fig. 2.
Fig. 2.

(a)–(d) Power density profiles for TM and TE modes in the coupler section (xy plane) at 1.55 μm. Device dimensions: w=330nm, w1=330nm, t=200nm, h=65nm, d=330nm, D=200nm.

Fig. 3.
Fig. 3.

Variation of coupling length with varying silica thickness (h) and silicon thickness (d) at 1.55 μm wavelength. Other waveguide dimensions are w=330nm, w1=330nm, t=200nm, D=200nm.

Fig. 4.
Fig. 4.

(a) Power transfer ratio as a function of wavelength for a 4.45 μm long directional coupler.

Fig. 5.
Fig. 5.

(a) Variation of power transfer ratio (η) with coupling length (Lc). (b), (c), and (d) Variations of Lc with metal film width (w1), silicon width (w), and spacer thickness (h) respectively. Other dimensions are as mentioned in the caption of Fig. 2.

Equations (1)

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η=[sin(πL2LC)]2.

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