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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 26 — Dec. 30, 2013
  • pp: 31951–31959

An investigation on optimum ridge width and exposed side strips width of terahertz quantum cascade lasers with metal-metal waveguides

Chao Xu, Seyed Ghasem Razavipour, Zbigniew Wasilewski, and Dayan Ban  »View Author Affiliations


Optics Express, Vol. 21, Issue 26, pp. 31951-31959 (2013)
http://dx.doi.org/10.1364/OE.21.031951


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Abstract

The impacts of side exposed side strips (for high order modes suppression) and ridge width on terahertz (THz) quantum cascade laser (QCL) performance are investigated through numerical modeling and verified experimentally. Our results show that shrinking ridge width of THz QCLs with metal-metal waveguides leads to a substantial degradation of device performance due to higher optical loss resulting from the side-exposed strips in the highly-doped top contact layer. Nevertheless, the side-exposed strips facilitate single mode operation by strongly suppressing higher-order modes. An optimal width of the side exposed strips is obtained for achieving adequate higher-order mode suppression and maintaining sufficiently low fundamental mode loss.

© 2013 Optical Society of America

OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.5960) Lasers and laser optics : Semiconductor lasers

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: November 18, 2013
Revised Manuscript: December 8, 2013
Manuscript Accepted: December 8, 2013
Published: December 16, 2013

Citation
Chao Xu, Seyed Ghasem Razavipour, Zbigniew Wasilewski, and Dayan Ban, "An investigation on optimum ridge width and exposed side strips width of terahertz quantum cascade lasers with metal-metal waveguides," Opt. Express 21, 31951-31959 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-26-31951


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References

  1. R. Köhler, A. Tredicucci, F. Beltram, H. E. Beere, E. H. Linfield, A. G. Davies, D. A. Ritchie, R. C. Iotti, and F. Rossi, “Terahertz semiconductor-heterostructure laser,” Nature417(6885), 156–159 (2002). [CrossRef] [PubMed]
  2. B. S. Williams, S. Kumar, H. Callebaut, Q. Hu, and J. L. Reno, “Terahertz quantum-cascade laser at λ≈ 100 μm using metal waveguide for mode confinement,” Appl. Phys. Lett.83(11), 2124–2126 (2003). [CrossRef]
  3. S. Fathololoumi, E. Dupont, C. W. I. Chan, Z. R. Wasilewski, S. R. Laframboise, D. Ban, A. Mátyás, C. Jirauschek, Q. Hu, and H. C. Liu, “Terahertz quantum cascade lasers operating up to ~ 200 K with optimized oscillator strength and improved injection tunneling,” Opt. Express20(4), 3866–3876 (2012). [CrossRef] [PubMed]
  4. S. Kumar, B. S. Williams, Q. Qin, A. W. M. Lee, Q. Hu, and J. L. Reno, “Surface-emitting distributed feedback terahertz quantum-cascade lasers in metal-metal waveguides,” Opt. Express15(1), 113–128 (2007). [CrossRef] [PubMed]
  5. W. Maineult, P. Gellie, A. Andronico, P. Filloux, G. Leo, C. Sirtori, S. Barbieri, E. Peytavit, T. Akalin, J.-F. Lampin, H. E. Beere, and D. A. Ritchie, “Metal-metal terahertz quantum cascade laser with micro-transverse-electromagnetic-horn antenna,” Appl. Phys. Lett.93(18), 183508 (2008). [CrossRef]
  6. P. Gellie, W. Maineult, A. Andronico, G. Leo, C. Sirtori, S. Barbieri, Y. Chassagneux, J. R. Coudevylle, R. Colombelli, S. P. Khanna, E. H. Linfield, and A. G. Davies, “Effect of transverse mode structure on the far field pattern of metal-metal terahertz quantum cascade lasers,” J. Appl. Phys.104(12), 124513 (2008). [CrossRef]
  7. Y. Chassagneux, J. Palomo, R. Colombelli, S. Dhillon, C. Sirtori, H. Beere, J. Alton, and D. Ritchie, “Terahertz microcavity lasers with subwavelength mode volumes and thresholds in the milliampere range,” Appl. Phys. Lett.90(9), 091113 (2007). [CrossRef]
  8. J. A. Fan, M. A. Belkin, F. Capasso, S. P. Khanna, M. Lachab, A. G. Davies, and E. H. Linfield, “Wide-ridge metal-metal terahertz quantum cascade lasers with high-order lateral mode suppression,” Appl. Phys. Lett.92(3), 031106 (2008).
  9. E. Dupont, S. Fathololoumi, Z. R. Wasilewski, G. Aers, S. R. Laframboise, M. Lindskog, S. G. Razavipour, A. Wacker, D. Ban, and H. C. Liu, “A phonon scattering assisted injection and extraction based terahertz quantum cascade laser,” J. Appl. Phys.111(7), 073111 (2012). [CrossRef]
  10. S. G. Razavipour, E. Dupont, S. Fathololoumi, C. W. I. Chan, M. Lindskog, Z. R. Wasilewski, G. Aers, S. R. Laframboise, A. Wacker, Q. Hu, D. Ban, and H. C. Liu, “An indirectly pumped terahertz quantum cascade laser with low injection coupling strength operating above 150 K,” J. Appl. Phys.113(20), 203107 (2013). [CrossRef]
  11. D. Ban, M. Wächter, H. C. Liu, Z. R. Wasilewski, M. Buchanan, and G. C. Aers, “Terahertz quantum cascade lasers: fabrication, characterization and doping effect,” J. Vac. Sci. Technol. A24(3), 778–782 (2006). [CrossRef]
  12. S. Kohen, B. S. Williams, and Q. Hu, “Electromagnetic modeling of terahertz quantum cascade laser waveguides and resonators,” J. Appl. Phys.97(5), 053106 (2005). [CrossRef]
  13. V. W. L. Chin, T. Osotchan, M. R. Vaughan, T. L. Tansley, G. J. Griffiths, and Z. Kachwalla, “Hall and drift mobilities in molecular beam epitaxial grown GaAs,” J. Electron. Mater.22(11), 1317–1321 (1993). [CrossRef]
  14. O. K. Kim and W. G. Spitzer, “Infrared reflectivity spectra and Raman spectra of Ga1-xAlxAs mixed crystals,” J. Appl. Phys.50(6), 4362–4370 (1979). [CrossRef]
  15. M. A. Ordal, R. J. Bell, R. W. Alexander, L. L. Long, and M. R. Querry, “Optical properties of fourteen metals in the infrared and far infrared: Al, Co, Cu, Au, Fe, Pb, Mo, Ni, Pd, Pt, Ag, Ti, V, and W,” Appl. Opt.24(24), 4493–4499 (1985). [CrossRef] [PubMed]
  16. D. R. Lide, “Electrical resistivity of pure metals,” in CRC Handbook of Chemistry and Physics, 88th ed. (CRC Press, 2008).
  17. S. Fathololoumi, E. Dupont, S. G. Razavipour, S. R. Laframboise, G. Parent, Z. R. Wasilewski, H. C. Liu, and D. Ban, “On metal contacts of terahertz quantum cascade lasers with a metal-metal waveguide,” Semicond. Sci. Technol.26(10), 105021 (2011). [CrossRef]
  18. Q. Hu, B. S. Williams, S. Kumar, H. Callebaut, S. Kohen, and J. L. Reno, “Resonant-phonon assisted THz quantum-cascade lasers with metal-metal waveguides,” Semicond. Sci. Technol.20(7), S228–S236 (2005). [CrossRef]
  19. S. Slivken, J. S. Yu, A. Evans, J. David, L. Doris, and M. Razeghi, “Ridge-width dependence on high tepmerature continuous-wave quantum-cascade laser operation,” Photonics Technol. Lett.16(3), 744–746 (2004). [CrossRef]
  20. S. Fathololoumi, E. Dupont, D. Ban, M. Graf, S. R. Laframboise, Z. R. Wasilewski, and H. C. Liu, “Time resolved thermal quenching of THz quantum cascade lasers,” IEEE J. Quantum Electron.46(3), 396–404 (2010). [CrossRef]
  21. X. Huang, Y. Chiu, W. O. Charles, and C. Gmachl, “Ridge-width dependence of the threshold of long wavelength (λ ≈ 14 µm) quantum cascade lasers with sloped and vertical sidewalls,” Opt. Express20(3), 2539–2547 (2012). [CrossRef] [PubMed]

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