Abstract

We report a particular coupling phenomenon occurring in the directional coupler composed of two touching terahertz antiresonant reflecting hollow waveguides. Unlike conventional directional couplers where one even system mode and one odd system mode are excited, numerical results indicate that three (one even and two odd) system modes participate in the power transfer process at the antiresonant frequencies. As a result, the coupling length can be significantly reduced, and it is shown here to be less than 300 wavelengths.

© 2011 Optical Society of America

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References

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2010 (3)

2009 (3)

2008 (1)

2007 (1)

2006 (1)

2004 (2)

1997 (1)

1996 (1)

Y.-H. Chen and Y.-T. Huang, J. Lightwave Technol. 14, 1507 (1996).
[CrossRef]

1995 (1)

V. R. Chinni, T. C. Huang, P.-K. A. Wai, C. R. Menyuk, and G. J. Simonis, J. Lightwave Technol. 13, 1530 (1995).
[CrossRef]

1993 (1)

R. Muschall, F. Lederer, and U. Trutschel, Int. J. Optoelectron. 8, 537 (1993).

1991 (1)

1986 (1)

M. A. Duguay, Y. Kokubun, and T. L. Koch, Appl. Phys. Lett. 49, 13 (1986).
[CrossRef]

Abbott, D.

Afshar, S. V.

Allard, J.-F.

Atakaramians, A.

Bang, O.

Bowden, B.

Chang, H.-C.

Chen, H.-W.

Chen, L.-J.

Chen, Y.-H.

Y.-H. Chen and Y.-T. Huang, J. Lightwave Technol. 14, 1507 (1996).
[CrossRef]

Chiang, P.-J.

Chinni, V. R.

V. R. Chinni, T. C. Huang, P.-K. A. Wai, C. R. Menyuk, and G. J. Simonis, J. Lightwave Technol. 13, 1530 (1995).
[CrossRef]

Chiu, C.-M.

Dubois, C.

Duguay, M. A.

M. A. Duguay, Y. Kokubun, and T. L. Koch, Appl. Phys. Lett. 49, 13 (1986).
[CrossRef]

Dupuis, A.

Fischer, B. M.

Harrington, J. A.

Hertel, P.

Hsueh, Y.-C.

Hsueh, Y.-H.

Huang, T. C.

V. R. Chinni, T. C. Huang, P.-K. A. Wai, C. R. Menyuk, and G. J. Simonis, J. Lightwave Technol. 13, 1530 (1995).
[CrossRef]

Huang, Y.-R.

Huang, Y.-T.

Y.-H. Chen and Y.-T. Huang, J. Lightwave Technol. 14, 1507 (1996).
[CrossRef]

Hwang, Y.-J.

Jepsen, P. U.

Kao, T.-F.

Koch, T. L.

M. A. Duguay, Y. Kokubun, and T. L. Koch, Appl. Phys. Lett. 49, 13 (1986).
[CrossRef]

Kokubun, Y.

M. A. Duguay, Y. Kokubun, and T. L. Koch, Appl. Phys. Lett. 49, 13 (1986).
[CrossRef]

Kuo, J.-L.

Lai, C.-H.

Lederer, F.

R. Muschall, F. Lederer, and U. Trutschel, Int. J. Optoelectron. 8, 537 (1993).

M. Mann, Y. Trutschel, C. Wächter, L. Leine, and F. Lederer, Opt. Lett. 16, 805 (1991).
[CrossRef] [PubMed]

Leine, L.

Liu, T.-A.

Lohmeyer, M.

Lu, J.-T.

Lu, J.-Y.

Mann, M.

Menyuk, C. R.

V. R. Chinni, T. C. Huang, P.-K. A. Wai, C. R. Menyuk, and G. J. Simonis, J. Lightwave Technol. 13, 1530 (1995).
[CrossRef]

Mitrofanov, O.

Mittleman, D. M.

K. Wang and D. M. Mittleman, Nature 432, 376 (2004).
[CrossRef] [PubMed]

Monro, T. M.

Morris, D.

Muschall, R.

R. Muschall, F. Lederer, and U. Trutschel, Int. J. Optoelectron. 8, 537 (1993).

Nielsen, K.

Peng, J.-L.

Rasmussen, H. K.

Shamonin, M.

Simonis, G. J.

V. R. Chinni, T. C. Huang, P.-K. A. Wai, C. R. Menyuk, and G. J. Simonis, J. Lightwave Technol. 13, 1530 (1995).
[CrossRef]

Skorobogatiy, M.

Stoeffler, K.

Sun, C.-K.

Trutschel, U.

R. Muschall, F. Lederer, and U. Trutschel, Int. J. Optoelectron. 8, 537 (1993).

Trutschel, Y.

Wächter, C.

Wai, P.-K. A.

V. R. Chinni, T. C. Huang, P.-K. A. Wai, C. R. Menyuk, and G. J. Simonis, J. Lightwave Technol. 13, 1530 (1995).
[CrossRef]

Wang, K.

K. Wang and D. M. Mittleman, Nature 432, 376 (2004).
[CrossRef] [PubMed]

Yamauchi, J.

J. Yamauchi, Propagating Beam Analysis of Optical Waveguides (Research Studies, 2003).

You, B.

Yu, C.-P.

Appl. Opt. (1)

Appl. Phys. Lett. (1)

M. A. Duguay, Y. Kokubun, and T. L. Koch, Appl. Phys. Lett. 49, 13 (1986).
[CrossRef]

Int. J. Optoelectron. (1)

R. Muschall, F. Lederer, and U. Trutschel, Int. J. Optoelectron. 8, 537 (1993).

J. Lightwave Technol. (3)

Y.-H. Chen and Y.-T. Huang, J. Lightwave Technol. 14, 1507 (1996).
[CrossRef]

V. R. Chinni, T. C. Huang, P.-K. A. Wai, C. R. Menyuk, and G. J. Simonis, J. Lightwave Technol. 13, 1530 (1995).
[CrossRef]

H.-W. Chen, C.-M. Chiu, C.-H. Lai, J.-L. Kuo, P.-J. Chiang, Y.-J. Hwang, H.-C. Chang, and C.-K. Sun, J. Lightwave Technol. 27, 1489 (2009).
[CrossRef]

Nature (1)

K. Wang and D. M. Mittleman, Nature 432, 376 (2004).
[CrossRef] [PubMed]

Opt. Express (5)

Opt. Lett. (5)

Other (1)

J. Yamauchi, Propagating Beam Analysis of Optical Waveguides (Research Studies, 2003).

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Figures (5)

Fig. 1
Fig. 1

Structure of the THz directional coupler composed of touching ARRHWs.

Fig. 2
Fig. 2

Power evolution along the propagation distance. (a)  540 GHz . (b)  460 GHz .

Fig. 3
Fig. 3

Normalized field distributions at 540 GHz . (a) Even system mode. (b) Odd system mode. Solid line, absolute value; dashed line, real part; dotted line, boundary position of cladding.

Fig. 4
Fig. 4

(a) Dispersion spectra of the system modes. (b) Transverse phases in the air core region. (c) Normalized field distributions (absolute values) of the odd system modes, where the top row is with O1 and the bottom row is with O2.

Fig. 5
Fig. 5

(a) Coupling length as a function of frequency. (Inset) Normalized field amplitude (absolute value) of the pseudo odd system mode a o 1 ψ o 1 + a o 2 ψ o 2 at 460 GHz . (b) Coupling length at 460 GHz with an air gap existing between the two ARRHWs.

Equations (2)

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f i = N i c 4 t n cl 2 n a 2 , i = r or a ,
L c = π | Re ( β e ) Re ( β o ) | ,

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