PUBLICATIONS in JOURNALS

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1. R. A. Sabet, A. Ishraq, A. Saltik, M. Bütün, O. Tokel, “Laser nanofabrication inside silicon with spatial beam modulation and anisotropic seeding”, Nature Communications, 15, 5786, (2024). (pdf)

In the news:  IEEE Spectrum (Carving out nanostructures beneath the surface of silicon),  Laser Focus World (Holographic techniques ‘key’ to nanofabrication deep within a silicon wafer), Microsoft Start (Researchers achieve unprecedented nanostructuring inside silicon), Yahoo – Taiwan ( Breakthrough in silicon), Bilkent News (Bilkent team achieves unprecedented nanostructuring inside silicon), Phys.org, Evrim Agaci, National TV.

2. M. A. Tausef, R. A. Sabet, O. Tokel, “Laser lithography of monolithically-integrated multi-level microchannels in silicon”, Advanced Materials Technologies, 9, 2301617, (2024). Highlighted on the back cover (Wiley link). (pdf)

3. M. Z. Borra, B. Radfar, H. Nasser, T. Colakoglu, O. Tokel, A. Turnali, M. Demirtas, D. Tasgin, H. Untunel, D. Toffoli, F. Ö. Ilday, R. Turan, I. Pavlov, A. Bek, “Development of a selective wet-chemical etchant for precise 3D sculpting of silicon enabled by infrared nonlinear laser modification”, Optics and Laser Technology, 176, 111022 (2024). (pdf)

4. A. Saltik, S. Saylan, O. Tokel, “Fourier-transform-only method for random phase shifting interferometry”, Journal of Optics, 26, 035604, (2024). (pdf)

5. A. Saltik, O. Tokel, “Laser-written wave plates inside the silicon enabled by stress-induced birefringence”, Optics Letters, 49, 1, 49, (2024). Highlighted as Editor’s Pick. (pdf)

6. M. Bütün, S. Saylan, R. A. Sabet, O. Tokel, “High-efficiency multilevel volume diffraction gratings inside silicon”, ACS Materials Au, 3, 6, 727, (2023). (pdf)

7. O. Tokel, “Investigating the potential of laser-written one-dimensional photonic crystals inside silicon”, Turkish Journal of Physics, 46, 4, 155, (2022). (pdf)

8. A. Osgouei, A. Ghobadi, B. Khalici, R. A. Sabet, O. Tokel, E. Ozbay “Visible Light Metasurface for Adaptive Photodetection”, Journal of Physics D: Applied Physics, 55, 475103 (2022). (pdf)

9. M. Chambonneau, D. Grojo, O. Tokel, F. Ö. Ilday, S. Tzortzakis, S. Nolte, “In-volume laser direct writing of silicon”, Laser & Photonics Reviews, doi:10.1002/lpor.202100140, (2021). Highlighted on the back cover (Wiley link). (pdf)

10. G. Makey, Ö. Yavuz, D. K. Kesim, A. Turnalı, P. Elahi, S. Ilday, O. Tokel†, F. Ö. Ilday†, “Breaking crosstalk limits to dynamic holography using orthogonality of high-dimensional random vectors”,  Nature Photonics, 13, 251, 2019. †co-corresponding author.  Highlighted on the cover (Nature link). https://www.nature.com/articles/s41566-019-0393-7  (pdf)

11. A. Turnali, M. Han, O. Tokel., “Laser-written depressed-cladding waveguides deep inside bulk silicon”, Journal of the Optical Society of America B, 36, 4, 966 (2019). (pdf)

12. O. Tokel†, A. Turnalı, G. Makey, P. Elahi, T. Çolakoğlu, E. Ergeçen, Ö. Yavuz, R. Hübner, M. Z. Borra, I. Pavlov, A. Bek, R. Turan, D. Kesim, S. Tozburun, S. Ilday, F. Ö. Ilday., “In-chip microstructures and photonic devices fabricated by nonlinear laser lithography deep inside silicon”, Nature Photonics, 11, 639–645 (2017). (pdf)

In the news:  Optics and Photonic News (From “on-chip” to “in-chip”); IEEE Spectrum (New laser technique promises photonic devices Inside of silicon), MIT Technology Review (Nanotechnologists discover how to carve tunnels beneath the surface of silicon chips), Laser Focus World, (‘In-chip’ devices enable truly 3D silicon photonics), Phys.org (Researchers fabricate 3-D silicon structures with a focused infrared laser), Physics Today (Laser used to create tunnels in silicon), Nanowerk.com (Silicon is liberated from Abbot’s Flatland), Bilkent News (Bilkent researchers “open up” silicon to 3D fabrication).

13. S. Ilday, G. Makey, G. Akguc, Ö. Yavuz, O. Tokel, I. Pavlov, O. Gulseren, F. Ö. Ilday, “Rich complex behaviour of self-assembled nanoparticles far from equilibrium”, Nature Communications, 8: 14942 (2017). (pdf)

In the news: Science Daily (No, complex is not complicated — it is rather simple), Bilkent News (Bilkent Researchers Find That Complexity Is Actually Rather Simple), Phys.org (Identifying the minimum requirements for the emergence of complexity).

14. I. Pavlov, O. Tokel, S. Pavlova, V. Kadan, G. Makey, A. Turnali, Ö. Yavuz, and F. Ö. Ilday, “Femtosecond laser written waveguides deep inside silicon”, Optics Letters, 42,15,3028 (2017). (pdf)

15. O. Tokel, U. H. Yildiz, F. Inci, N. G. Durmus, O. Ekiz, B. Turker, C. Cetin, S. Rao, K. Sridhar, N. Natarajan, H. Shafiee, A. Dana and U. Demirci, “Portable microfluidic integrated plasmonic platform for pathogen detection”, Scientific Reports, 5: 9152 (2015). (pdf)

16. O. Tokel, F. Inci and U. Demirci, “Advances in plasmonic technologies for point of care applications”, ACS Chemical Reviews, 114, 11, 5728 (2014). (pdf)

17.  F. Inci†, O. Tokel†, S. Wang , U. Gurkan , S. Tasoglu , D. R. Kuritzkes , and U. Demirci, “Nanoplasmonic quantitative detection of intact viruses from unprocessed whole blood”, ACS Nano, 7, 6, 4733 (2013). †: Co-first authors alphabetically ordered. (pdf)

18. C. K. Ulrich, J. Chen, O. Tokel and P. L. Houston. “Photodissociation of ozone from 321-329 nm: the relative yields of O(3P2) with O2(X3Σg), O2(a1Δg), and O2(b1Σ+g)”, The Journal of Physical Chemistry A, 117, 46, 12011 (2013). (pdf)

19. O. Tokel, J. Chen, C. K. Ulrich and P. L. Houston. “The O(1D) + N2O reaction: NO vibrational and rotational distributions”, The Journal of Physical Chemistry A, 114, 42, 11292 (2010). (pdf)

20. H. M. Lambert, E. W. Davis, O. Tokel, A. A. Dixit and P. L. Houston, “Photodissociation channels for N2O near 130 nm studied by product imaging”, The Journal of Chemical Physics, 122, 174304 (2005). (pdf)

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CONFERENCES

 

  1. M. Butun, S. Saylan, R. A. Sabet, O. Tokel, “Multilevel diffraction gratings inside silicon towards spectral filtering”, Laser Applications in  Microelectronic and Optoelectronic Manufacturing (LAMOM XXIX), SPIE Lase, San Frans., USA, Jan, 2024.
  2. O. Tokel, “Laser nano-lithography buried deep inside silicon wafers”,  Progress in Ultrafast Laser Modification of Materials, Nikko,  Japan, June, 2023. (invited presentation)
  3. R. A. Sabet, O. Tokel, “Sub-wavelength silicon nano-structuring with direct laser writing”, META 2023, Paris, France, July, 2023. 
  4. R. A. Sabet, A. Saltik, O. Tokel, “Creating efficient nano-gratings buried in silicon through laser nano-lithography”, Laser Applications in  Microelectronic and Optoelectronic Manufacturing (LAMOM XXVIII), SPIE Lase, San Fransisco, USA, Jan, 2023.
  5. A. Saltik, R. A. Sabet, O. Tokel, “Refractive index and birefringence studies of laser-written structures buried inside silicon”, Laser Applications in  Microelectronic and Optoelectronic Manufacturing (LAMOM XXVIII), SPIE Lase, San Fransisco, USA, Jan, 2023.
  6. S.  Golghasemi, O. Tokel, “Ultrafast-laser-writing of buried microchannels inside silicate glasses towards screen-based applications”, Sicecam 37th International Glass Conference– Istanbul, Turkey, Nov, 2022.
  7. M. A. Tauseef, R. A. Sabet, O. Tokel, “Creation of high-aspect-ratio microchannels inside silicon with three-dimensional laser lithography”, Conference on Lasers and Electro-Optics Hybrid– San Jose, USA, May, 2022.
  8. O. Tokel, “Laser nano-fabrication buried deep inside silicon wafers”, Laser Applications in Microelectronic and Optoelectronic Manufacturing, SPIE Photonics West, San Francisco, USA, Jan, 2022. (invited presentation) 
  9. R. A. Sabet, A. Ishraq, O. Tokel, “Laser nanofabrication deep inside silicon wafers”, Conference on Lasers and Electro-Optics/Europe – European Quantum Electronics Virtual Conferences (CLEO/Europe-EQEC 2021), 21-25 June 2021. (oral presentation) 
  10. O. Tokel. A new dimension in silicon: “in-chip” photonic devices and 3D micro-structures enabled with nonlinear laser lithography,Conference on Lasers and Electro-Optics, San Jose, USA, 2019 (invited presentation)
  11.  A. Turnali, A. Ishraq, G. Makey, O. Tokel. Spatial-control of laser-written in-chip Si structures with Bessel beams. Conference on Lasers and Electro-Optics, Munich, 2019, (Oral Presentation)
  12. M. Z. Borra, H. Nasser, E. H. Ciftpinar, A. Turnali , P. Deminskyi, T. Colakoglu, O. Tokel, F. Ö. Ilday, I. Pavlov, R. Turan, A. Bek. Conference on Lasers and Electro-Optics, Munich, Germany, 2019 (Oral Presentation)
  13.  O. Tokel, G. Makey, D. Kesim, Ö. Yavuz, A. Turnali, P. Elahi, J. Toumi, M. Daher, S. Ilday, F. Ö. Ilday. Large-volume, multiplane Fresnel holography for 3D displays. APS March Meeting, Los Angeles, USA, 2018 (Oral Presentation)
  14.  A. Turnali, P. Deminskyi, S. Ilday, F. Ö. Ilday, O. Tokel. Subsurface processing of GaAs by nanosecond pulses. APS March Meeting, Los Angeles, USA, 2018 (Oral Presentation)
  15. D. Kesim, G. Makey, O. Yavuz, A. Turnali, S.. Ilday, O. Tokel, F. Ö. Ilday. 3D display prototype enabled by a new Fresnel hologram algorithm.  APS March Meeting, Los Angeles, USA, 2018 (Oral Presentation)
  16.  S. Ilday, E. Engin, G. Makey, Ö., Yavuz, D. Kesim, O. Tokel, O. Gulseren, F. Ö. Ilday. Universal dynamic self-assembly: from colloids to microorganisms to sub-10 nm particles. APS March Meeting, Los Angeles, USA, 2018 (Oral Presentation)
  17. Ö. Yavuz, G. Makey, S. Jahangirov, S. Ilday, O. Tokel, F. Ö. Ilday. Pattern guiding via “structured noise”. APS March Meeting, Los Angeles, USA, 2018 (Oral Presentation)
  18. P. Deminskyi, A. Turnali, M. Borra, T. Colakoglu, A. Bek, R. Turan, F. Ö. Ilday, O. Tokel. Hollow microstructures fabricated by combination of nonlinear laser lithography and wet etching deep inside silicon. APS March Meeting, Los Angeles, USA, 2018 (Oral Presentation)
  19. D. Kesim, G. Makey, Ö. Yavuz, A. Turnali, S. Ilday, O. Tokel, F. Ö. Ilday. 3D display prototype enabled by a new Fresnel hologram algorithm. APS March Meeting, Los Angeles, USA, 2018 (Oral Presentation)
  20. G. Makey, Ö. Yavuz, D. Kesim, A.Turnali, P. Elahi, J. Toumi, M. Daher, S. Ilday, O. Tokel, F. Ilday. Applying the principle of orthogonality of high-dimensional random vectors to obtain high-density, large-volume 3D holographic display. Conference on Lasers and Electro-Optics Pacific Rim, Hong Kong, 2018 (Oral Presentation)
  21. O. Tokel, A. Turnali, P. Deminskyi, S. Ilday, F. Ö. Ilday. Laser writing of nanostructures deep inside Gallium Arsenide. Conference on Lasers and Electro-Optics Pacific Rim, Hong Kong, 2018 (Oral Presentation)
  22. O. Tokel, A. Turnali, T. Çolakoglu, I. Pavlov, M. Borra, G. Makey, A. Bek, R. Turan, F. Ö. Ilday, Laser slicing of silicon wafers. APS March Meeting, New Orleans, USA, 2017.
  23. A. Turnali, O. Tokel, T. Çolakoglu, M. Borra, I. Pavlov, A. Bek, R. Turan, F. Ö. Ilday, Monolithically integrated micro-fluidic channels for silicon chip cooling. APS March Meeting, New Orleans, USA, 2017.
  24. Ö. Yavuz, S. Kara, O. Tokel, I. Pavlov, F. Ö. Ilday. Doppler effect on structure period of Nonlinear Laser Lithography. APS March Meeting, New Orleans, USA, 2017.
  25. I. Pavlov, O. Tokel, S. Pavlova, V. Kadan, G. Makey, A. Turnali, F. Ö. Ilday. Optical waveguides written in silicon with femtosecond laser. APS March Meeting, New Orleans, USA, 2017.
  26. G. Makey, S. Ilday, O. Tokel, M. Ibrahim, Ö. Yavuz, I. Pavlov, O. Gulseren, and F. Ö. Ilday. Lindemann histograms as a new method to analyse nano-patterns and phases. APS March Meeting, New Orleans, USA, 2017.
  27. S. Ilday, G. Makey, G. Akguc, Ö. Yavuz, O. Tokel, I. Pavlov, O. Gulseren, and F. Ö. Ilday. Emergence of life-like properties from dissipative self-assembly of nanoparticles. APS March Meeting, New Orleans, USA, 2017.
  28. I. Pavlov, O. Tokel, Ö. Yavuz, G. Makey, F. Ö. Ilday. Nonlinear Laser Lithography for both “normal” and “anomalous” laser induced periodic structuring. APS March Meeting, New Orleans, USA, 2017.
  29. Ö. Yavuz, G. Makey, S. Jahangirov, S. Ilday, O. Tokel, F. Ö. Ilday. Pattern guiding with structured noise, Israel-Turkey workshop on nanoscale science and nanotechnology,  Weizman Institute, Israel, 2017.
  30. A. Turnali, O. Tokel, T. Çolakoglu, M. Borra, I. Pavlov, A. Bek, R. Turan, F. Ö. Ilday, Monolithically integrated micro-fluidic channels for silicon chip cooling. SPIE Photonics West, San Fransisco, USA, 2017.
  31. P. Elahi, G. Makey, A. Turnali, O. Tokel, F. Ö. Ilday. 1.06μm-1.35μm coherent pulse generation by a synchronously-pumped phosphosilicate raman fiber laser. Conference on Lasers and Electro-optics, Munich, Germany, 2017.
  32. I. Pavlov, O. Tokel, S. Pavlova, V. Kadan, G. Makey, A. Turnali, T. Colakoglu, O. Yavuz, and F. Ö. Ilday. Optical waveguides written deep inside silicon by femtosecond laser. Conference on Lasers and Electro-optics, Munich, Germany, 2017.
  33. A. Turnali, O. Tokel, D. K. Kesim, G. Makey, P. Elahi and F. Ö. Ilday. Buried waveguides written deep inside silicon. Conference on Lasers and Electro-optics, Munich, Germany, 2017.
  34. O. Yavuz, S. Kara, O. Tokel, I. Pavlov and F. Ö. Ilday. Doppler effect on nanopatterning with nonlinear laser lithography. Conference on Lasers and Electro-optics, Munich, Germany, 2017.
  35. D. K. Kesim, G. Makey, O. Yavuz, O. Tokel, and F. Ö. Ilday. Two-photon excitation of quantum dots in 3D via stacked fresnel hologram algorithm. Conference on Lasers and Electro-optics, Munich, Germany, 2017.
  36. O. Tokel, A. Turnali, T. Colakoglu, S. Ilday, M. Z. Borra, I. Pavlov, A. Bek, R. Turan, and F. Ö. Ilday. Laser-slicing of silicon with nonlinear laser lithography. The 12th Conference on Lasers and Electro-Optics Pacific Rim, Singapore, 2017.
  37. A. Turnali, O. Tokel, D. K. Kesim, G. Makey, P. Elahi, and F. Ö. Ilday. Buried waveguides written deep inside silicon. The 12th Conference on Lasers and Electro-Optics Pacific Rim, Singapore, 2017.
  38. O. Yavuz, S. Kara, O. Tokel, I. Pavlov, and F. Ö. Ilday. Doppler effect on nanopatterning with Nonlinear Laser Lithography. The 12th Conference on Lasers and Electro-Optics Pacific Rim, Singapore, 2017.
  39. G. Makey, O. Tokel, D. Kesim, A. Turnali, O. Yavuz, J. Toumi, M. El-Daher, and F. Ö. Ilday. High-resolution superposition algorithm for multiplane 3D Fresnel holograms. The 12th Conference on Lasers and Electro-Optics Pacific Rim, Singapore, 2017.
  40. P. Deminskyi, S. Ilday, O. Tokel, I. Pavlov, and F. Ö. Ilday. Wettability of Si surface under combination of NLL and surface plasma polymerization. The 12th Conference on Lasers and Electro-Optics Pacific Rim, Singapore, 2017.
  41. S. Ilday, E. Pince, G. Makey, M. Ibrahimi, M. Erdogan, O. Yavuz, O. Tokel, O. Gulseren, F. Ö. Ilday. Exploration of emergent collective phenomena and dynamic behavior of active matter subjected to steep spatiotemporal thermal gradients. MRS Spring Meeting, Phoenix, Arizona, USA, 2017.
  42. S. Ilday, G. Makey, G. Akguc, O. Yavuz, O. Tokel, I. Pavlov, O. Gulseren, F. Ö. Ilday. Emergence of life-like properties from dissipative self-assembly of nanoparticles. MRS Spring Meeting, Phoenix, Arizona, USA, 2017.
  43. O. Tokel, O. Yavuz, I. Pavlov, G. Makey, S. Ilday, F. Ö. Ilday. Directed nanopatterning of self-organized Bravais lattices. MRS Spring Meeting, Phoenix, Arizona, USA, 2017.
  44. S. Ilday, I. Pavlov, O. Tokel, P. Deminskyi, I. Gnilitskyi, L. Orazi, F. Ö. Ilday. Surface engineering via Nonlinear Laser Lithography for efficient shaping, splitting, transport and collection of water at the microscale. MRS Spring Meeting, Phoenix, Arizona, USA, 2017.
  45. O. Tokel, A. Turnali, G.Makey, P. Elahi, S.Ilday, T. Colakoglu, O. Yavuz, R. Huebner, M. Zolfaghari, I. Pavlov, A.Bek, R. Turan, F. Ö. Ilday. Subsurface engineering of Si for 3D Devices. MRS Spring Meeting, Phoenix, Arizona, USA, 2017.
  46. S. Ilday, G. Makey, G. B. Akgüç, Ö. Yavuz, O. Tokel,  I. Pavlov, O. Gülseren, F. Ö. Ilday, Emergent complex behavior of self-assembled nanoparticles far from equilibrium, 5th International Conference on Multifunctional, Hybrid and Nanomaterials, Lisbon, Portugal, 2017.
  47. G. Makey, S. Ilday, O. Tokel, Ö. Yavuz, I. Pavlov, O. Gulseren, and F. Ö. Ilday. Lindemann histograms as a tool to analyze nanopatterns in colloidal self assembly experiments. MRS Meeting, Boston, Massachussets, USA, 2016.
  48. I. Pavlov, Ö. Yavuz, G. Makey, O. Tokel and F. Ö. Ilday. A new approach to surface nano-patterning: controlled transitions between “normal” and “anomalous” laser-induced periodic surface structures. MRS Meeting, Boston, Massachussets, USA, 2016.
  49. Ö. Yavuz, O. Tokel, E. Ergeçen, I. Pavlov, G. Makey, and F. Ö. Ilday. Highly stable nanolattice structures using Nonlinear Laser Lithography. APS March Meeting, Baltimore, Maryland, USA, 2016.
  50. G. Akgüç, S. Ilday, G. Makey, I. Pavlov, Ö. Yavuz, O. Tokel, O. Gülseren and F. Ö. Ilday. Realization of atomistic transitions with colloidal nanoparticles using an ultrafast laser. APS March Meeting, Baltimore, Maryland, USA, 2016.
  51. O. Tokel, A. Turnalı, E. Ergeçen, I. Pavlov and F. Ö. Ilday. 3D functional elements deep inside silicon with Nonlinear Laser Lithography. APS March Meeting, Baltimore, Maryland, USA, 2016.
  52. O. Tokel, Ö. Yavuz, E. Ergeçen, I. Pavlov, G. Makey and F. Ö. Ilday. Directed nanopatterning with Nonlinear Laser Lithography. APS March Meeting, Baltimore, Maryland, USA, 2016.
  53. S. Ilday, G. Akgüç, O. Tokel, G. Makey, Ö. Yavuz, I. Pavlov, and F. Ö. Ilday. Control of dynamical self-assembly of strongly Brownian nanoparticles through convective forces induced by ultrafast laser. APS March Meeting, Baltimore, Maryland, USA, 2016.
  54. Ö. Yavuz, O. Tokel, I. Pavlov, E. Ergeçen and F. Ö. Ilday. Periodic lattices for flexible displays created by Nonlinear Laser Lithography. Material Research Society Spring Meeting, Phoenix, Arizona, USA, 2016.
  55. O. Tokel, A. Turnalı, I. Pavlov and F. Ö. Ilday. A new dimension in silicon: functional elements buried in silicon. Material Research Society Spring Meeting, Phoenix, Arizona, USA, 2016.
  56. S. Ilday, O. Tokel, G. Makey, Ö. Yavuz, G. Akgüc, I. Pavlov, and F. Ö. Ilday, O. Gülseren Realization of atomistic transitions with colloidal nanoparticles by using ultrafast laser. Material Research Society Spring Meeting, Phoenix, Arizona, USA, 2016.
  57. S. Ilday, Ö. Yavuz, G. Makey, G. Akgüc, O. Tokel, I. Pavlov, and F. Ö. Ilday, O. Gülseren, Control of dynamical self-assembly of strongly brownian nanoparticles through convective forces induced by ultrafast laser. Material Research Society Spring Meeting, Phoenix, Arizona, USA, 2016.
  58. Ö. Yavuz, E. Ergeçen, O. Tokel, I. Pavlov, A. Rızaoglu, and F. Ö. Ilday. Highly stable periodic structures using nonlinear laser lithography. CLEO/Pacific Rim, 2015. The 11th conference on Lasers and Electro-optics Pacific Rim, Busan, Korea, 2015.
  59. O. Tokel, A. Turnalı, I. Pavlov, and F. Ö. Ilday. Physical model for subsurface silicon writing. CLEO/Pacific Rim, 2015. The 11th conference on Lasers and Electro-optics Pacific Rim, Busan, Korea, 2015.
  60. O. Tokel, A. Turnalı, I. Pavlov, and F. Ö. Ilday. Direct laser writing of volume Fresnel zone plates in silicon. CLEO/Europe – EQEC 2015, Conference on Lasers and Electro-optics, Munich, Germany, 2015.
  61. O. Tokel, A. Turnalı, I. Pavlov, and F. Ö. Ilday. Laser writing deep inside silicon for 3D information processing. CLEO/Europe – EQEC 2015 Conference on Lasers and Electro-optics, Munich, Germany, 2015.
  62. E. Ergeçen, Ö. Yavuz, O. Tokel, I. Pavlov, A. Rızaoglu, and F. Ö. Ilday. Controlling laser-induced self-organized patterns via engineering defects. CLEO/Europe – EQEC 2015 Conference on Lasers and Electro-optics, Munich, Germany, 2015.
  63. Ö. Yavuz, E. Ergeçen, O. Tokel, I. Pavlov, and F. Ö. Ilday. Mathematical model for nonlinear laser lithography. CLEO/Europe – EQEC 2015 Conference on Lasers and Electro-optics, Munich, Germany, 2015. 

(Bilkent era)

WORKSHOPS

  1. B. Doğukaya, R. A. Sabet, O. Tokel, “Polarization effect on silicon surface laser sanolithography”, 25th National Optics, Electro-optics, and Photonics Workshop – Fotonik 2024, Ankara, Turkey, September, 2024.
  2. M. Bütün, R. A. Sabet, A. Garip, B. Köker, O. Tokel, “Laser nano-patterning on silicon: a novel approach utilizing subsurface nanostructures”, 25th National Optics, Electro-optics, and Photonics Workshop – Fotonik 2024, Ankara, Turkey, September, 2024. (Best Poster Award)
  3. M. Bütün, S. Saylan, R. A. Sabet, O. Tokel, “Wavelength-selective three-dimensional silicon gratings”, Fotonik 2023: 24th National Optics, Electro-optics, and Photonics Workshop, Istanbul, Turkey, September, 2023.  
  4. Sh. Golghasemi, O. Tokel, “Fabrication of micro-channels inside aluminosilicate glasses by ultrafast laser lithography”, 2023 UNAM Nanoday, Ankara, Turkey, June 2023. 
  5. M. Bütün, S. Saylan, R. A. Sabet, O. Tokel, “Multi-layer volumetric diffraction gratings in silicon for enhanced efficiency”, Fotonik 2022: 23nd National Optics, Electro-optics, and Photonics Workshop, Ankara, Turkey, September, 2022. 
  6. Sh. Golghasemi, O. Tokel, “Ultrafast-laser-writing deep inside aluminosilicate glass towards screen-based applications”, 23nd Fotonik 2022, National optics, electro-optics and photonics workshop, Ankara, Turkey, September 2022. 
  7. Sh. Golghasemi, O. Tokel, “Ultrafast-laser-writing of buried microchannels inside silicate glass towards screen-based applications”, 37th international glass conference, Istanbul, Turkey, November 2022. 
  8. A. Saltik, O. Tokel, “Quantitative phase microscopy with random phase shifting”, 22nd National optics, electro-optics and photonics workshop, online, September, 2021.