Publications

Patents

  1. A. Demir, “Çok bölgeli yarı iletken lazer,” Turkish Patent Institute (TPE), 201807466 (2021). – (Licensed)
  2. A. Demir, “Multi-section semiconductor laser,” PCT/TR2019/050359. – (Licensed)
  3. A. Demir and M. Peters, “Bidirectional Long Cavity Semiconductor Laser for Improved Power and Efficiency,” United States Patent and Trademark Office (USPTO), US9647416B2(2017).

Journal Publications

  1. E. Karabey, B. Olyaeefar, M. Alizadeh, R. El-Ganainy, and A. Demir, “1 W Single-Mode Large-Area Edge-Emitting Laser via Non-Hermitian Spatial Mode Filtering,” Laser & Photonics Reviews e71502 (2026).
  2. A. K. Sünnetçioğlu, K. Ebadi, and A. Demir, “Waveguide Width Governs Thermal Loading and Reliability in High-Power Laser Diodes,” Opt. Express 34, 25273 (2026).
  3. A. A. Madigawa, M. S. Sultani Vala, and A. Demir, “Efficient scaling of VCSELs to wavelength dimensions via lithographically defined cavities,” Journal of Physics: Photonics 7 (4), 045029 (2025).
  4. O. A. Saadi, A. K. Sünnetçioğlu, K. Ebadi, A. Houimi, and A. Demir, “Enhanced Thermal Management in Semiconductor Lasers via Distributed Waveguide Design,” Journal of Lightwave Technology 43 (19), 9276-9281 (2025).
  5. A. Demir, A. K. Sünnetçioğlu, K. Ebadi, and B. Olyaeefar, “Technological Approaches Addressing Reliable Output Power Limits in High Power Edge-Emitting Lasers,” IEEE Journal of Selected Topics in Quantum Electronics 31 (2), 1503111 (2025) (Invited).
  6. B. Olyaeefar, E. Şeker, R. El-Ganainy, and A. Demir, “Quasi PT-Symmetric Edge-Emitting Lasers Outperform PT-Symmetric Ones,” IEEE Journal of Selected Topics in Quantum Electronics 31 (2), 1502908 (2025).
  7. M. S. Sultani Vala, B. Olyaeefar, D. Apaydın, and A. Demir, “Lithographically defined cavities with high Quality and Purcell factors,” Journal of Physics: Photonics 7 (1), 015004 (2025).
  8. A. Demir, “Parity-time symmetry in VCSELs utilizing lithographic cavities,” Turkish Journal of Physics 49, 63–71 (2025).
  9. E. Şeker, B. Olyaeefar, K. Dadashi, S. Şengül, M. H. Teimourpour, R. El-Ganainy, and A. Demir, “Single-mode quasi PT-symmetric laser with high power emission,” Light: Science & Applications 12, 149 (2023).
  10. Y. Zhao, G. Yang, Y. Zhao, S. Tang, Y. Lan, Y. Liu, Z. Wang, and A. Demir, “Epitaxially-Stacked High Efficiency Laser Diodes Near 905 nm,” IEEE Photonics J. 14, 1557006 (2022).
  11. Y. Liu, G. Yang, Y. Zhao, S. Tang, Y. Lan, Y. Zhao, and A. Demir, “48 W continuous-wave output from a high-efficiency single emitter laser diode at 915 nm,” IEEE Photon. Technol. Lett. 34, 1218 (2022).
  12. Y. Liu, K. Ebadi, A. K. Sünnetçioglu, S. Gündoğdu, S. Şengül, Y. Zhao, Y. Lan, Y. Zhao, G. Yang, and A. Demir, “Elimination of catastrophic optical mirror damage in continuous-wave high-power laser diodes using multi-section waveguides,” Opt. Exp. 30, 31539 (2022).
  13. Y. Lan, G. Yang, Y. Zhao, Y. Liu, and A. Demir, “Facet passivation process of high-power laser diodes by plasma cleaning and ZnO film,” Appl. Surf. Sci. 596, 153506 (2022).
  14. Y. Lan, G. Yang, Y. Liu, Y. Zhao, Z. Wang, T. Li, and A. Demir, “808 nm broad-area laser diodes designed for high efficiency at high-temperature operation,” Semicond. Sci. Technol. 36, 105012 (2021).
  15. Y. Liu, G. Yang, Z. Wang, T. Li, S. Tang, Y. Zhao, Y. Lan, and A. Demir, “High-power operation and lateral divergence angle reduction of broad-area laser diodes at 976 nm,” Optics & Laser Technology 141, 107145 (2021).
  16. Y. Zhao, Z. Wang, A. Demir, G. Yang, S. Ma, B. Xu, C. Sun, B. Li, and B. Qiu, “High Efficiency 1.9 kW Single Diode Laser Bar Epitaxially Stacked With a Tunnel Junction,“ IEEE Photonics J. 13 (3), 1500708 (2021).
  17. S. Arslan, S. Gundogdu, A. Demir, and A. Aydınlı, “Facet cooling in high power InGaAs/AlGaAs lasers,” IEEE Photon. Technol. Lett. 31, 94-97 (2019).
  18. S. Gundogdu, A. Demir, H. S. Pisheh and A. Aydınlı, “Low Loss Long Wavelength Quantum Cascade Lasers without Epitaxial Regrowth,” IEEE Photon. Technol. Lett. 30, 1997-2000 (2018).
  19. S. Sarıtaş, A. Demir, S. Şahin and A. Aydınlı, “Conservation of quantum efficiency in quantum well intermixing by stress engineering with dielectric bilayers,” Semicond. Sci. Technol. 33, 025001(2018).
  20. S. Gundogdu, H. S. Pisheh, A. Demir, M. Gunoven, and A. Aydınlı, “In-situ time resolved temperature measurements of pulse driven quantum cascade lasers,” Opt. Exp. 26, 6572 (2018).
  21. U. S. Gökay, M. Zakwan, A. Demir, and A. Serpengüzel, “Optical Fiber Excitation of Fano Resonances in a Silicon Microsphere,” Fiber and Integrated Optics 35, 38-46(2016).
  22. A. Demir, M. Peters, R. Duesterberg, V. Rossin, and E. Zucker, “Semiconductor Laser Power Enhancement by Control of Gain and Power Profiles,” IEEE Photon. Technol. Lett. 27, 2178-2181(2015).
  23. M. S. Murib, Y.O. Yılmaz, A. Demir, Ş. Işçi, T. Bilici, A. Kurt, P. Wagner, and A. Serpengüzel, “Elastic scattering from a sapphire microsphere placed on a glass optical fiber coupler: possible applications to biosensing,” Eur. Phys. J. Special Topics 223, 1–8 (2014).
  24. A. Demir, E. Yüce, A. Serpengüzel, and J.A. Lock, “Geometrically Enhanced Morphology Dependent Resonances of a Dielectric Sphere,” Appl. Opt. 50, 6652-6656 (2011).
  25. A. Demir, G. Zhao, and D. G. Deppe, “Lithographic lasers with low thermal resistance,” Electron. Lett. 46, 1147-1149 (2010).
  26. G. Ozgur, A. Demir, and D. G. Deppe, “Threshold Temperature Dependence of a Quantum-Dot Laser Diode with and Without p-Doping,” IEEE J. Quant. Electron. 45, 1265-1272(2009).
  27. A. Serpengüzel and A. Demir, “Silicon microspheres for near-IR communication applications,” Semicond. Sci. Technol. 23, 064009 (2008).
  28. A. Demir and A. Serpengüzel, “Silica Microspheres for Biomolecular Detection Applications,” IEE Proc. Nanobiotechnol. 152, 105-108 (2005).
  29. Y. O. Yilmaz, A. Demir, A. Kurt, and A. Serpengüzel, “Optical Channel Dropping with a Silicon Microsphere,” IEEE Photon. Technol. Lett. 17, 1662-1664 (2005).

Conference Proceedings

  1. A. Demir, H. Mohammad, K. Ebadi, A. K. Sünnetçioğlu, and O. A. Saadi, “Chip-level thermal management architectures for high-reliability laser diode pumps in inertial fusion energy systems,” Optical Technologies for Inertial Fusion Energy II 13888, 24 (2026).
  2. M. S. Sultani Vala, A. A. Madigawa, and A. Demir, “Efficient wavelength-scale VCSELs via lithographically defined cavities,” Vertical-Cavity Surface-Emitting Lasers XXX 13911, 129 (2026).
  3. O. A. Saadi, A. Houimi, K. Ebadi, A. K. Sünnetçioğlu, and A. Demir, ” Body temperature reduction in high-power laser diodes using distributed waveguide design,” High-Power Diode Laser Technology XXIII 13345, 34 (2025).
  4. A. Demir, A. K. Sünnetçioğlu, K. Ebadi, Y. Liu, S. Tang, and G. Yang, “Narrow versus Broad Waveguide Laser Diodes: A Comparative Analysis of Self-Heating and Reliability,” High-Power Diode Laser Technology XXII 12867, 119-125 (2024).
  5. G. Yang, Y. Liu, Y. Zhao, Y. Lan, Y. Zhao, S. Tang, W. Wu, Z. Yao, Y. Li, J. Di, J. Lin, and A. Demir, “Efficient power scaling of broad-area laser diodes from 915 to 1064 nm,” High-Power Diode Laser Technology XXII 12867, 235 (2024).
  6. A. K. Sünnetçioğlu, K. Ebadi and A. Demir, “Waveguide Width Dependence of Reliability in GaAs-Based Laser Diodes,” The European Conference on Lasers and Electro-Optics (CLEO/Europe-EQEC) (2023).
  7. B. Olyaeefar, E. Şeker, K. Dadashi, S. Şengül, M. H. Teimourpour, R. El-Ganainy, and A. Demir, “Quasi PT-Symmetric Design for Single-Mode High-Power Edge-Emitting Semiconductor Lasers,” The European Conference on Lasers and Electro-Optics (CLEO/Europe-EQEC) (2023).
  8. A. Demir, K. Ebadi, Y. Liu, A. K. Sünnetçioglu, S. Gündoğdu, S. Şengül, Y. Zhao, Y. Lan, and G. Yang, “COMD-free continuous-wave high-power laser diodes by using a multi-section waveguide method,” SPIE Photonics West, Proc. SPIE 124030D (2023).
  9. G. Yang, Y. Liu, Y. Zhao, S. Tang, Y. Lan, Y. Zhao, L. Bai, L. Yi, X. Wang, and A. Demir, “48W continuous-wave output power with high efficiency from a single emitter laser diode at 915nm,” SPIE Photonics West, Proc. SPIE 124030H (2023).
  10. K. Ebadi, Y. Liu, A. K. Sünnetçioglu, S. Gündoğdu, S. Şengül, Y. Zhao, Y. Lan, G. Yang, and A. Demir, “Multisection waveguide method for facet temperature reduction and improved reliability of high-power laser diodes,” SPIE Photonics Europe, Proc. SPIE 1214104 (2022).
  11. E. Şeker, S. Şengül, K. Dadashi, B. Olyaeefar, and A. Demir, “Single-mode operation of electrically pumped edge-emitting lasers through cavity coupling of high order modes,” SPIE Photonics West, Proc. SPIE 119830C (2022).
  12. A. A. Madigawa, and A. Demir, “Wavelength-scale lithographic VCSELs,” IEEE 27th International Semiconductor Laser Conference (ISLC) 1-2 (2021).
  13. D. Apaydın, H. Kurt and A. Demir, “High-Quality Factor Micro and Nanoscale Lithographic Cavity for VCSELs,” in Frontiers In Optics (2020).
  14. K. Dadashi, E. Şeker, and A. Demir, “Single lateral mode edge-emitting lasers using coupled waveguides”, OSA Laser Congress 2020, JTh2A.31-1 (2020).
  15. A. Demir, D. Apaydın and H. Kurt, “Submicron Size All-Semiconductor Vertical Cavities with High Q,” The European Conference on Lasers and Electro-Optics (CLEO/Europe-EQEC), p. cb_p_21 (2019).
  16. A. Demir, S. Arslan, S. Gundogdu, and A. Aydınlı, “Reduced facet temperature in semiconductor lasers using electrically pumped windows,” SPIE Photonics West, Proc. SPIE 109000R (2019).
  17. S. Arslan, S. Gündoğdu, A. Demir, and A. Aydınlı, “Facet temperature reduction by separate pumped window in high power laser diodes,” Semiconductor Lasers and Laser Dynamics VIII 10682, 106822B (2018).
  18. S. Arslan, S. Şahin, A. Demir, and A. Aydinli, “IFVD-based large intermixing selectivity window process for high power laser diodes,” Semiconductor Lasers and Laser Dynamics VIII 10682, 106821S (2018).
  19. S. Gündoğdu, H.S. Pisheh, A. Demir, M. Günoven, A. Aydinli, and C. Sirtori, “Thermal characterisation of quantum cascade lasers with Fabry Perot modes,” Semiconductor Lasers and Laser Dynamics VIII 10682, 106820J (2018).
  20. M. Peters, A. Fily, V. Rossin and A. Demir, “Power Saturation in Standard and Double-AR Unfolded Laser Diode Cavities,” International Semiconductor Laser Conference (2016). [Invited]
  21. V. Rossin, M. Peters, A. Demir, et.al, “High power, high brightness diode lasers for kW lasers systems,” IEEE High Power Diode Lasers and Systems, 35-36 (2015). [Invited]
  22. A. Demir, M. Peters, R. Duesterberg, V. Rossin, and E. Zucker “29.5W continuous wave output from 100µm wide laser diode,” Proc. SPIE 9348, 93480G(2015).
  23. E. Zucker, V. Rossin, J. Skidmore, M.Peters, A. Demir, et.al., “Advancements in laser diode chip and packaging technologies for application in kW-class fiber laser pumping,” Proc. SPIE 8965-6 (2014).
  24. H. Yu, D. Kliner, K.H. Liao, J. Segall, A. Demir, et.al., “1.2-kW single-mode fiber laser based on 100-W high-brightness pump diodes,” Proc. SPIE 8237 (2012).
  25. A. Demir, G. Zhao, S. Freisem, X. Liu and D. G.Deppe, “Scaling properties of lithographic VCSELs,” Proc. SPIE 7952, 795200 (2011).
  26. G. Zhao, A. Demir, S. Freisem, Y. Zhang, X. Liu and D.G.Deppe, “New VCSEL technology with scalability for single mode operation and densely integrated arrays,” Proc. SPIE Def., Sec., and Sens. 8054-8 (2011).
  27. D.G. Deppe, S. Freisem, G. Zhao, L. Wang, and A. Demir, “Record performance levels in quantum dot lasers with applications to 1.3 and 1.55 µm wavelengths,” Proc. SPIE Def., Sec., and Sens. 8054-6 (2011).
  28. A. Demir, G. Zhao, G.Ozgur, S. Freisem and D.G. Deppe, “Oxide-free and Lithographic Vertical-Cavity Surface Emitting Laser,” Conference on Lasers and Electro Optics (CLEO), San Jose, CA, p. CMO3 (2010).
  29. G. Zhao, A. Demir, S. Freisem, D.G.Deppe, “Scaling Properties of Lithographical Lasers,” Proc. SPIE Photonics North, Niagara Falls, Canada (2010).
  30. D.G. Deppe, A. Demir, S. Freisem, G. Ozgur, G. Zhao, and K. Shavritranuruk, “Threshold, Electronic Confinement, and Internal Loss Characteristics of Quantum Dot Lasers: Prospects for Continued Performance Improvement,” SPIE Photonics West 2010, San Francisco, January 23-28 (Invited).
  31. A. Demir, G. Ozgur, K Shavitranuruk, S. Freisem and D.G. Deppe, “Threshold and Temperature Dependence of Quantum Dot Laser Diode Approaching Ideal Performance,” CLEO, Baltimore, MA, p. CMV5 (2009).
  32. G. Ozgur, A. Demir, D.G. Deppe, “Transparency Current Influence on the Temperature Dependent Threshold of Undoped and P-Doped QD Laser Diodes,” IEEE Photonics Society Annual Meeting Conf. Proc., p.737-738 (2009)
  33. D.G. Deppe, S. Freisem, H. Chen, K. Shavritranuruk, A. Demir and G. Ozgur, “Physics of quantum dot lasers: Threshold temperature dependence, internal loss effects, and threshold current density,” INOW, p. 64 (2008).
  34. D.G. Deppe, S. Freisem, H. Chen, G. Ozgur, A. Demir and A. Muller, “Nanophotonic Lasers and Spontaneous Light Sources: Scaling Trends for Speed, Efficiency, and Quantum Light Generation Using Single Quantum Dots,” Int. Nano-Optoelectronics Workshop, p.3 (2007)
  35. H. Pattanaik, G. Zhao, G. Ozgur, A. Demir and D. G. Deppe, “Alpha-factor in above threshold operation of 1.3 μm QD laser diode,” Photonics 2008: International Conference on Fiber and Photonics, New Delhi, India (2008).
  36. A. Serpengüzel and A.Demir, “Biophotonic sensor applications based on photonic atoms”, Proc. SPIE 6099, 106-112 (2006).
  37. A. Serpengüzel, Y.O. Yilmaz, A. Demir, O. Akatlar, and A. Kurt, “Semiconductor microspheres in optoelectronics,” Proc. SPIE 5952, 59520N (2005).
  38. A. Serpengüzel, A. Demir, and A. Kurt, “Semiconductor and dielectric microspheres for optoelectronic applications,” Proc. SPIE 5840, 554-561 (2005).
  39. A. Serpengüzel and A. Demir, “Laser Remote Sensing of Chemical Species,” Proc. Advanced Technologies in Aviation Symposium 2, 583-585 (2004).