Abstract

We report laterally waveguide-coupled octagonal microresonators with designed round resonator corners in silicon nitride. We demonstrate nearly single-mode add–drop filter characteristics, when 50µm-size round-cornered octagonal microresonators are used, with an optimum coupling efficiency exceeding 96%, a finesse of 30, and a Q of 6400. Our experiments also reveal two unforeseen phenomena in certain microresonator shapes: a pronounced drop in coupling efficiency and resonance notches in the drop spectrum. These device characteristics hint at the recently postulated multiple orbit interference in waveguide-coupled polygonal microresonators.

© 2005 Optical Society of America

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  1. C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
    [CrossRef]
  2. A. W. Poon, F. Courvoisier, and R. K. Chang, Opt. Lett. 26, 623 (2001).
    [CrossRef]
  3. C. Y. Fong and A. W. Poon, Opt. Express 11, 2897 (2003), http://www.opticsexpress.org .
    [CrossRef] [PubMed]
  4. N. Ma, C. Li, and A. W. Poon, IEEE Photon. Technol. Lett. 16, 2487 (2004).
    [CrossRef]
  5. C. Li, N. Ma, and A. W. Poon, Opt. Lett. 29, 471 (2004).
    [CrossRef] [PubMed]
  6. D. Rafizadeh, J. P. Zhang, S. C. Hagness, A. Taflove, K. A. Stair, and S. T. Ho, Opt. Lett. 22, 1244 (1997).
    [CrossRef] [PubMed]
  7. T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
    [CrossRef]
  8. L. Maleki, A. B. Matsko, A. A. Savchenkov, and V. S. Ilchenko, Opt. Lett. 29, 626 (2004).
    [CrossRef] [PubMed]
  9. C. Li and A. W. Poon, in 2004 Digest of the IEEE/LEOS Summer Topical Meetings (Institute of Electrical and Electronic Engineers, Piscataway, N.J., 2004), pp. 35–36.
  10. FullWAVE; Rsoft, Inc., research software, http://www.rsoftinc.com .

2004 (4)

N. Ma, C. Li, and A. W. Poon, IEEE Photon. Technol. Lett. 16, 2487 (2004).
[CrossRef]

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

C. Li, N. Ma, and A. W. Poon, Opt. Lett. 29, 471 (2004).
[CrossRef] [PubMed]

L. Maleki, A. B. Matsko, A. A. Savchenkov, and V. S. Ilchenko, Opt. Lett. 29, 626 (2004).
[CrossRef] [PubMed]

2003 (1)

2001 (1)

1999 (1)

C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
[CrossRef]

1997 (1)

Barwicz, T.

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

Chang, R. K.

Courvoisier, F.

Fan, S.

C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
[CrossRef]

Fong, C. Y.

Hagness, S. C.

Haus, H. A.

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
[CrossRef]

Ho, S. T.

Ilchenko, V. S.

Ippen, E. P.

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

Joannopoulos, J. D.

C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
[CrossRef]

Khan, M. J.

C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
[CrossRef]

Li, C.

C. Li, N. Ma, and A. W. Poon, Opt. Lett. 29, 471 (2004).
[CrossRef] [PubMed]

N. Ma, C. Li, and A. W. Poon, IEEE Photon. Technol. Lett. 16, 2487 (2004).
[CrossRef]

C. Li and A. W. Poon, in 2004 Digest of the IEEE/LEOS Summer Topical Meetings (Institute of Electrical and Electronic Engineers, Piscataway, N.J., 2004), pp. 35–36.

Ma, N.

N. Ma, C. Li, and A. W. Poon, IEEE Photon. Technol. Lett. 16, 2487 (2004).
[CrossRef]

C. Li, N. Ma, and A. W. Poon, Opt. Lett. 29, 471 (2004).
[CrossRef] [PubMed]

Maleki, L.

Manolatou, C.

C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
[CrossRef]

Matsko, A. B.

Poon, A. W.

C. Li, N. Ma, and A. W. Poon, Opt. Lett. 29, 471 (2004).
[CrossRef] [PubMed]

N. Ma, C. Li, and A. W. Poon, IEEE Photon. Technol. Lett. 16, 2487 (2004).
[CrossRef]

C. Y. Fong and A. W. Poon, Opt. Express 11, 2897 (2003), http://www.opticsexpress.org .
[CrossRef] [PubMed]

A. W. Poon, F. Courvoisier, and R. K. Chang, Opt. Lett. 26, 623 (2001).
[CrossRef]

C. Li and A. W. Poon, in 2004 Digest of the IEEE/LEOS Summer Topical Meetings (Institute of Electrical and Electronic Engineers, Piscataway, N.J., 2004), pp. 35–36.

Popovic, M. A.

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

Rafizadeh, D.

Rakich, P. T.

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

Savchenkov, A. A.

Smith, H. I.

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

Stair, K. A.

Taflove, A.

Villeneuve, P. R.

C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
[CrossRef]

Watts, M. R.

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

Zhang, J. P.

IEEE J. Quantum Electron. (1)

C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).
[CrossRef]

IEEE Photon. Technol. Lett. (1)

N. Ma, C. Li, and A. W. Poon, IEEE Photon. Technol. Lett. 16, 2487 (2004).
[CrossRef]

Opt. Express (2)

T. Barwicz, M. A. Popovic, P. T. Rakich, M. R. Watts, H. A. Haus, E. P. Ippen, and H. I. Smith, Opt. Express 12, 1473 (2004), http://http://www.opticsexpress.org .
[CrossRef]

C. Y. Fong and A. W. Poon, Opt. Express 11, 2897 (2003), http://www.opticsexpress.org .
[CrossRef] [PubMed]

Opt. Lett. (4)

Other (2)

C. Li and A. W. Poon, in 2004 Digest of the IEEE/LEOS Summer Topical Meetings (Institute of Electrical and Electronic Engineers, Piscataway, N.J., 2004), pp. 35–36.

FullWAVE; Rsoft, Inc., research software, http://www.rsoftinc.com .

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Figures (4)

Fig. 1
Fig. 1

Schematic of the laterally waveguide-coupled round-cornered octagonal microresonator channel add–drop filter: I, input; T, throughput; D, drop; A, add.

Fig. 2
Fig. 2

a–f, Top-view scanning-electron micrographs of fabricated filters with R/L ratios of 0 to 0.5. g–l, Measured TM-polarized spectra of the filters with R/L ratios of 0 to 0.5. Throughput, solid curves; drop, dashed curves. m–r, On-resonance top-view optical microscope images with R/L ratios from 0 to 0.5. I, input.

Fig. 3
Fig. 3

Measured Q (squares) and simulated Q (circles) at various R/L ratios. Inset, measured Q (squares) and simulated Q (circles) for R/L=0.3 at various waveguide widths w.

Fig. 4
Fig. 4

(a) Measured coupling efficiency at various R/L ratios for w=0.6 µm (solid curve) and w=0.5 µm (dashed curve). Inset, integrated top-view imaged scattering intensity at resonances at various R/L ratios for w=0.6 µm (solid curve) and w=0.5 µm (dashed curve). (b) Measured TM-polarized spectra with R/L=0.25 and w=0.5 µm. Throughput, solid curve; drop, dashed curve.

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