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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 25 — Dec. 7, 2009
  • pp: 23247–23253

Integration of GaN/AlN all-optical switch with SiN/AlN waveguide utilizing spot-size conversion

Norio Iizuka, Haruhiko Yoshida, Nobuto Managaki, Toshimasa Shimizu, Sodabanlu Hassanet, Chiyasit Cumtornkittikul, Masakazu Sugiyama, and Yoshiaki Nakano  »View Author Affiliations

Optics Express, Vol. 17, Issue 25, pp. 23247-23253 (2009)

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Spot-size converters for an all-optical switch utilizing the intersubband transition in GaN/AlN multiple quantum wells are studied with the purpose of reducing operation power by improving the coupling efficiency between the input fiber and the switch. With a stair-like spot-size converter, the absorption saturation of 5 dB is achieved with a pulse energy of 25 pJ. The switch is integrated with a SiN/AlN waveguide and spot-size converters, and the structure provides the possibility of an integration of the switch with other functional devices. To further improve the coupling loss between the waveguide and the switch, triangular-shaped converters are investigated, demonstrating losses as low as 2 dB/facet.

© 2009 OSA

OCIS Codes
(190.5970) Nonlinear optics : Semiconductor nonlinear optics including MQW
(230.4320) Optical devices : Nonlinear optical devices
(230.7370) Optical devices : Waveguides
(250.6715) Optoelectronics : Switching

ToC Category:
Optical Devices

Original Manuscript: October 7, 2009
Revised Manuscript: November 16, 2009
Manuscript Accepted: November 22, 2009
Published: December 3, 2009

Norio Iizuka, Haruhiko Yoshida, Nobuto Managaki, Toshimasa Shimizu, Sodabanlu Hassanet, Chiyasit Cumtornkittikul, Masakazu Sugiyama, and Yoshiaki Nakano, "Integration of GaN/AlN all-optical switch with SiN/AlN waveguide utilizing spot-size conversion," Opt. Express 17, 23247-23253 (2009)

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  1. D. Hofstetter, S.-S. Schad, H. Wu, W. J. Schaff, and L. F. Eastman, “GaN/AlN-based quantum-well infrared photodetector for 1.55 μm,” Appl. Phys. Lett. 83(3), 572–574 (2003). [CrossRef]
  2. N. Iizuka, K. Kaneko, and N. Suzuki, “All-optical switch utilizing intersubband transition in GaN quantum wells,” IEEE J. Quantum Electron. 42(8), 765–771 (2006). [CrossRef]
  3. N. Suzuki and N. Iizuka, “Feasibility study on ultrafast nonlinear optical properties on 1.55-μm intersubband transition in AlGaN/GaN quantum wells,” Jpn. J. Appl. Phys. 36(Part 2, No. 8A), L1006–L1008 (1997). [CrossRef]
  4. N. Iizuka, K. Kaneko, N. Suzuki, T. Asano, S. Noda, and O. Wada, “Ultrafast intersuband relaxation (≤150 fs) in AlGaN/GaN multiple quantum wells,” Appl. Phys. Lett. 77(5), 648–650 (2000). [CrossRef]
  5. H. M. Ng, C. Gmachl, S. N. G. Chu, and A. Y. Cho, “Molecular beam epitaxy of GaN/AlxGa1-xN superlatttice for 1.52-4.2 μm intersubband transitions,” J. Cryst. Growth 220(4), 432–438 (2000). [CrossRef]
  6. J. D. Heber, C. Gmachl, H. M. Ng, and A. Y. Cho, “Comparative study of ultrafast intersubband electron scattering times at = 1.55 μm wavelength in GaN/AlN heterostructures,” Appl. Phys. Lett. 81(7), 1237–1239 (2002). [CrossRef]
  7. R. Rapaport, G. Chen, O. Mitronov, C. Gmachl, H. M. Ng, and S. N. Chu, “Resonat optical nonlinearityies from intersubband transitions in GaN/AlN wuamtum wells,” Appl. Phys. Lett. 83(2), 263–265 (2003). [CrossRef]
  8. J. Hamazaki, H. Kunigita, K. Ema, A. Kikuchi, and K. Kishino, “Intersubband relaxation dymnamics in GaN/AlN multiple wuantum wells studied by two-color pump-probe experiments,” Phys. Rev. B 71(16), 1–5 (2005). [CrossRef]
  9. N. Iizuka, K. Kaneko, and N. Suzuki, “Sub-picosecond modulation by intersubband transition in ridge waveguide with GaN/AlN quantum wells,” Electron. Lett. 40(15), 962–963 (2004). [CrossRef]
  10. N. Iizuka, K. Kaneko, and N. Suzuki, “Sub-picosecond all-optical gate utilizing GaN intersubband transition,” Opt. Express 13(10), 3835–3840 (2005). [CrossRef] [PubMed]
  11. C. Kumtornkittikul, T. Shimizu, N. Iizuka, N. Suzuki, M. Sugiyama, and Y. Nakano, “AlN waveguide with GaN/AlN quantum wells for all-optical switch utilizing intersubband transition,” Jpn. J. Appl. Phys. Lett. 46(15), L352–L355 (2007). [CrossRef]
  12. T. Shimizu, C. Kumtornkittikul, N. Iizuka, N. Suzuki, M. Sugiyama, and Y. Nakano, “Fabrication and measurement of AlN cladding AlN/GaN multiple-quantum-well waveguide for all-optical switching devices using intersubband transition,” Jpn. J. Appl. Phys. 46(No. 10A), 6639–6642 (2007). [CrossRef]
  13. Y. Li, A. Bhattacharyya, C. Thomidis, T. D. Moustakas, and R. Paiella, “Ultrafast all-optical switching with low saturation energy via intersubband transitions in GaN/AlN quantum-well waveguides,” Opt. Express 15(26), 17922–17927 (2007). [CrossRef] [PubMed]
  14. N. Iizuka, K. Kaneko, and N. Suzuki, “Polarization dependent loss in III-nitride optical waveguide for telecommunication devices,” J. Appl. Phys. 99(9), 1–5 (2006). [CrossRef]
  15. J. Kageyama, K. Kintaka, and J. Nishii, “Transmission loss characteristics of silicon nitride waveguides fabricated by liquid source plasma enhanced chemical vapor deposition,” Thin Solid Films 515(7-8), 3816–3819 (2007). [CrossRef]
  16. R. Hui, S. Taherion, Y. Wan, J. Li, S. X. Jin, J. Y. Lin, and H. X. Jiang, “GaN-based waveguide devices for long-wavelength optical communications,” Appl. Phys. Lett. 82(9), 1326–1328 (2003). [CrossRef]
  17. N. Iizuka, T. Shimizu, C. Kumtornkittikul, and M. Sugiyama, and Y. Nakano, “Absorption saturation of AlN-based waveguide utilizing intersuuband transition in GaN/AlN quantum well,” presented at Joint Conference of the Opto-Electronics and Communications Conference and the Australian Conference on Optical Fibre Technology, Sydney, Australia, 7–10 July, 2008, TuH-6.

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