Graduate Students
RESEARCH OPPORTUNITIES FOR GRADUATE STUDENTS FOR SPRING 2023
Currently, we have open positions for new graduate students in the following ongoing projects:
1) Laser investigation of novel nano particles for photo-thermal therapy and photo-dynamic therapy
2)Development of novel pulsed lasers for photo-acoustic tomography applications
3)Miniaturized waveguide lasers
Additional current research areas of my group also include:
1) Investigation of nano-structured carbon based materials such as graphene and carbon nanotubes for femtosecond pulse generation from lasers
2)Development of new ceramic based lasers in the infrared spectral region
3)Thulium lasers operating in the mid infrared
4) Femtosecond pulse generation from mid-infrared thulium lasers
Some of our recent papers covering studies in the above research areas include:
1. S. Icli, Y. Morova, U. Aydemir, and A. Sennaroglu, “Self-Q-switched and widely tunable continuous-wave operation of a Tm3+:Lu2O3 ceramic laser near 2 μm,” Opt. Mater., 139, 113801 (2023). Article link at: https://authors.elsevier.com/a/1gx2d3IPaIj-rP
2. F. D. Ince, Y. Morova, U. Yazlar, and A. Sennaroglu, “Femtosecond laser writing of low-loss waveguides with different geometries in diamond,” Diamond & Related Materials, 135 109894, (2023). Article link at: https://authors.elsevier.com/a/1gqux3IYYktGzI
3. H. Jahangiri, Y. Morova, A. A. Alamdari, Z. Eroglu, A. Sennaroglu, S. Guo, O. Metin, A. Motallebzadeh, “Femtosecond Laser-Mediated Preparation of HfNbTaTiZr Refractory High-Entropy Alloy Nanoparticles for Photothermal Therapy Applications:Influence of Solvent and Fluence,” Intermetallics, 156, 107834 (2023).
Article link at: https://authors.elsevier.com/c/1gcQ63RtPs~JTI
4. Y. Morova, B. Morova, H. Jahangiri, I. Baylam, A. Di Lieto, G. Cittadino, E. Damiano, M. Tonelli, A. Sennaroglu, “Femtosecond laser written continuous-wave Nd3+:BaY2F8 waveguide laser at 1.3 μm,” Opt. Mater., 134, 113199 (2022).
5. Y. Morova, M. Khan, B. Denker, B. Galagan, S. Sverchkov, and A Sennaroglu, “Tunable continuous-wave laser operation of Tm3+ ion doped tellurite glass near 2 μm,” J. Lumin., 252, 119318 (2022).
6. A. Sennaroglu, “Upconversion pumping of lasers via excited-state absorption: an analytical rate-equation formulation,” J. Opt. Soc. Am. B, 39, 2400-2406 (2022).
7. K. Onbasli, M. Erkısa, G. Demirci, A. Muti, E. Ulukaya, A. Sennaroglu, and H. Y. Acar, “The improved killing of both androgen-dependent and independent prostate cancer cells by etoposide loaded SPIONs coupled with NIR irradiation,” Biomaterials Science, 10, 3951-3962 (2022).
8. S. Savani, K. Onbasli, H. Gunduz, E. Aydındogan, M. Erkısa, A. Muti, M. Khan, A. Sennaroglu, E. Ulukaya, H. Y. Acar, S. Kolemen, “Development of a cysteine responsive chlorinated hemicyanine for image-guided dual phototherapy,” Bioorganic Chemistry, 122, 105725, (2022). https://doi.org/10.1016/j.bioorg.2022.105725.
9. Y. Morova, M. Tonelli, and A. Sennaroglu, “Fabrication of femtosecond laser written depressed-cladding waveguides in Tm3+:BaY2F8 crystal and laser operation near 2 μm,” Opt. Mater., 126, 112121, (2022). https://doi.org/10.1016/j.optmat.2022.112121.
10. (Invited for the 40th anniversary special edition of the Applied Physics B journal) A. Sennaroglu and Y. Morova, “Divalent (Cr2+), Trivalent (Cr3+), and Tetravalent (Cr4+) Chromium Ion-Doped Tunable Solid-State Lasers Operating in the Near and Mid Infrared Spectral Regions,” Appl. Phys. B, 128, 9 (2022). https://doi.org/10.1007/s00340-021-07735-1.
11. A. Sennaroglu, M. Khan, M. Hashemkhani, and H. Yagci Acar, “Determination of the Wavelength-Dependent Photothermal Conversion Efficiency of Photosensitizers for Photothermal Therapy: Application to Ag2S-Glutathione Quantum Dots,” J. Phys. Chem. B, 125, 11650−11659 (2021).
12. B. Arslan, K. Bilici, G. Demirci, T. Almammadov, M. Khan, A. Sennaroglu, H. Yagci Acar, and S. Kolemen, “A Leucine Aminopeptidase Activatable Photosensitizer for Cancer Cell Selective Photodynamic Therapy Action,” Dyes and Pigments, 195, 109735, DOI 10.1016/j.dyepig.2021.109735 (2021).
13. M. Hashemkhani, G. Demirci, A. Bayir, A. Muti, A. Sennaroglu, L. Mohammad-Hadi, E. Yaghini, M. Loizidou, S. MacRobert and H. Yagci Acar, “Cetuximab-Ag2S Quantum Dots for Targeted Imaging and Combination ALA-based Photodynamic/Chemotherapy of Colorectal Cancer Cells,” Nanoscale, 13, 14879-14899, DOI10.1039/d1nr03507j (2021).
14. G. O. Eren, S. Sadeghi, H. B. Jalali, M. Ritter, M. Han, I. Baylam, R. Melikov, A. Onal, F. Oz, M. Sahin, C. W. Ow-Yang, A. Sennaroglu, R. T. Lechner, and S. Nizamoglu, “Cadmium-Free and Efficient Type-II InP/ZnO/ZnS Quantum Dots and Their Application for LEDs,” ACS Appl. Mater. Interfaces, 13, 32022−32030 (2021).
15. Y. Morova, E. N. Kamun, M. Tonelli, and A. Sennaroglu, “Tunable laser operation of Tm3+:KY3F10 near 1.9 µm via upconversion pumping at 1064 nm,” J. Opt. Soc. Am. B, 38, B21-B25 (2021).
16. H. Gunduz, K. Bilici, S. Cetin, A. Muti, A. Sennaroglu, H. Y. Acar, S. Kolemen, “Dual laser activatable brominated hemicyanine as a highly efficient and photostable multimodal phototherapy agent,” Journal of Photochemistry and Photobiology B-Biology, 217, 112171 (2021).
17. M. Hashemkhani, K. Bilici, A. Muti, A. Sennaroglu, H. Y. Acar, “Multimodal image-guided folic acid targeted Ag-based quantum dots for the combination of selective methotrexate delivery and photothermal therapy,” Journal of Photochemistry and Photobiology B-Biology, 213, 112082 (2020).
18. H. B. Jalali, S. Sadeghi, I. Baylam, M. Han, C. W. Ow-Yang, A. Sennaroglu, and Sedat Nizamoglu “Exciton Recycling via InP Quantum Dot Funnels for Luminescent Solar Concentrators,” Nano Research, https://doi.org/10.1007/s12274-020-3207-9, ISSN 1998-0124 CN 11-5974/O4, (2020).
19. A. Kahraman, M. B. Vishlaghi, I. Baylam, H. Ogasawara, A. Sennaroglu, and S. Kaya, “The Fast-Track Water Oxidation Channel on BiVO4 Opened by Nitrogen Treatment,” The Journal of Physical Chemistry Letters, 11, 8758-876(2020).
20. K. Bilici, N. Atac, A. Muti, I. Baylam, O. Dogan, A. Sennaroglu, F. Can and H. Yagci Acar, “Broad spectrum antibacterial photodynamic and photothermal therapy achieved with indocyanine green loaded SPIONs under near infrared irradiation,” Biomaterials Science, DOI: 10.1039/d0bm00821d (2020).
21. S. Sadeghi, H. B. Jalali, S. B. Srivastava, R. Melikov, I. Baylam, A. Sennaroglu, and S. Nizamoglu, “High-performance, large-area and ecofriendly luminescent solar concentrators Using Copper-doped InP Quantum Dots,” iScience, 23, 101272, https://doi.org/10.1016/j.isci.2020.101272, (2020).
22. A. Muti, I. Baylam, M. Tonelli, and A. Sennaroglu, “Tunable continuous-wave laser operation of Tm3+:BaY2F8 near 2.3 µm,” Opt. Lett., 45, 4104-4107 (2020).
23. A. Sennaroglu, G. Goodno, S. Mirov, J. Nilsson, A. Petersen, I. Sorokina, and S. Taccheo, “Advanced Solid-State Lasers 2019: Focus issue introduction,” Opt. Express, 28, 15035-15037 (2020).
24. A. Sennaroglu, G. Goodno, S. Mirov, J. Nilsson, A. Petersen, I. Sorokina, and S. Taccheo, “Advanced Solid-State Lasers 2019: Focus issue introduction,” Opt. Mater. Express, 10, 1303-1305 (2020).
25. M. Hashemkhani, K. Bilici, A. Muti, A. Sennaroglu, H. Y. Acar, “Ag2S-Glutathione quantum dots for NIR image guided photothermal therapy,” New Journal of Chemistry, 44, 5419-5427 (2020).
26. Y. Morova, J. E. Bae, F. Rotermund, and A. Sennaroglu, “Laser-micromachined zebra-patterned graphene as a mode locker with adjustable loss,” Opt. Lett., 45, 1826-1829 (2020).
27. Y. Morova, M. Tonelli, V. Petrov, and A. Sennaroglu, “Upconversion pumping of a 2.3 mm Tm3+:KY3F10 laser with a 1064 nm ytterbium fiber laser,” Opt. Lett., 45, 931-934 (2020).
28. A. Muti, F. Canbaz, M. Tonelli, J. E. Bae, F. Rotermund, V. Petrov, and A. Sennaroglu, “Graphene mode-locked operation of Tm3+:YLiF4 and Tm3+:KY3F10 lasers near 2.3 μm,” Opt. Lett., 45, 656-659 (2020).
29. A. Kahraman, M. B. Vishlaghi, I. Baylam, A. Sennaroglu, and S. Kaya, “The Roles of charge carriers in the excited state dynamics of BiVO4 photoanodes,” J. Phys. Chem. C, 123, 28576−28583 (2019).
30. K. Bilici, A. Muti, A. Sennaroglu, and H. Yagci Acar, “Indocyanine green loaded APTMS coated SPIONs for dual phototherapy of cancer,” Journal of Photochemistry and Photobiology B-Biology, 201, 111648 (2019).
Other related papers and conference presentations may be found in the “publications” link. Interested students who plan to enroll in the graduate programs of Physics, Electrical-Electronics Engineering, or Materials Science and Engineering may contact me by email (asennar at ku.edu.tr).
FORMER GRADUATE STUDENTS AND THESES
GRADUATE STUDENTS AND THESES
PhD Students
1) İdris Kabalcı, Istanbul Technical University, PhD in Physics, March 2006, Co-advisor: Prof. Dr. Gönül Özen,
Thesis Title: ‘Florotelürit Optik Camların Termal, Mikroyapısal ve Spektroskopik Özellikleri’ (Thermal, Microstructural, and Spectroscopic Properties of Fluoro-tellurite Optical Glasses).
2) Hamit Kalaycıoğlu, Koç University, PhD in Electrical and Electronics Engineering, September 2008.
Thesis Title: Development and Characterization of Advanced Mid-Infrared Solid State Laser Systems
3) Hüseyin Çankaya, Koç University, PhD in Materials Science and Engineering, August 2011.
Thesis Title: Development of Advanced Solid-State Pulsed Lasers in the Near and Mid Infrared for Applications in Material Characterization
4) Ersen Beyatlı, Koç University, PhD in Electrical and Electronics Engineering, January 2014.
Thesis Title: Development of Energy Efficient Tunable Solid-State Lasers with Low Power Consumption
5) Melisa Natali Çizmeciyan Sözüdoğru, PhD in Materials Science and Engineering, August 2014.
Thesis Title: Development of Mid-Infrared Coherent Sources Based on Novel Nonlinear Devices
6) Işınsu Baylam, PhD in Physics, January 2017.
Thesis Title: Graphene-Based Fast Saturable Absorber Devices and Their Application to Mode Locking of Solid-State Lasers
7) İsmail Yorulmaz, PhD in Materials Science and Engineering, December 2017.
Thesis Title: Continuous-wave Diode Pumping and Pulsed Operation of Alexandrite Lasers near 760 nm and Tm3+:YLF Lasers near 2300 nm.
8) Ferda Canbaz, PhD in Physics, August 2018.
Thesis Title: Graphene Mode-locked and Kerr-lens Mode-locked Operations of Cr3+:LiSAF Lasers Near 850 nm and Tm3+:YLF Lasers near 2300 nm.
9) Can Cihan, PhD in Electrical-Electronics Engineering, October 2018.
Thesis Title: Near-infrared Femtosecond Laser Sources Based on Alexandrite and Cr:LiSAF Gain Media.
10) Abdullah Kahraman, PhD in Materials Science and Engineering, July 2020, Co-advisor: Prof. Sarp Kaya
Thesis Title: Time-resolved Spectroscopy on the Carrier Dynamics of BiVO4 Photoanodes for Solar Water Oxidation.
11) Abdullah Muti, PhD in Physics, September 2020.
Thesis Title: Green Diode Pumping of Femtosecond Ti3+:sapphire Lasers and the First Demonstration of 2.3-µm Laser Operation in Trivalent Thulium-doped KY3F10 and BaY2F8 Fluoride Crystals.
12) Yağız Morova, Istanbul Technical University, PhD in Engineering Physics, May 2021, Co-advisor: Doç. Dr. Seda Aksoy Esinoğlu,
Thesis Title: Femtosaniye Lazer ile İşlenen Yapıların Katıhal Lazerlerde Uygulamaları ve Üst Çevrim Pompalı Tm3+:KY3F10 Lazerleri (Solid-State Laser Applications of Femtosecond Laser Written Structures and Upconversion Pumped Tm3+:KY3F10 Lasers).
MS Students
1) Ümit Demirbaş, Koç University, MS in Materials Science and Engineering, June 2006
Thesis Title: Preparation, Spectroscopy, and Lasing Performance of Cr2+:ZnSe.
2) Hüseyin Çankaya, Koç University, MS in Materials Science and Engineering, August 2006
Thesis Title: Analysis of Solid-State Saturable Absorbers and Their Application to Passive Q Switching of Lasers.
3) Serhat Tozburun, Koç University, MS in Physics, July 2007
Thesis Title: Experimental Investigation of Pulsed, Eye-Safe Solid-State Lasers in the Near Infrared.
4) Ahmet Koray Erdamar, Koç University, MS in Physics, August 2007
Thesis Title: Spectroscopic Investigation of CdS Quantum Dots and Fe2+:ZnSe.
5) Reyhane Kılcı, Koç University, MS in Physics, September 2008
Thesis Title: Investigation of UV-Visible Converters Based on Erbium-Doped Aromatic Polymers
6) Natali Çizmeciyan, Koç University, MS in Materials Science and Engineering, August 2009
Thesis Title: Development of a Femtosecond Cr:ZnSe Seed Laser for Regenerative Amplification.
7) Aref Mostafazadeh, Koç University, MS in Electrical and Computer Engineering, August 2010
Thesis Title: Pulse Energy Optimization in Multipass-Cavity Mode-locked Femtosecond Lasers.
8) Adil Tolga Görgülü, Koç University, MS in Materials Science and Engineering, July 2011
Thesis Title: Spectroscopic Investigation of Thulium Doped Tellurite Glasses for 2μm Laser Applications
9) Işınsu Baylam, Koç University, MS in Physics, September 2012
Thesis Title: Energy scaling of a multi-pass cavity femtosecond bulk laser mode locked with graphene and carbon nanotube saturable absorbers
10) Philipp Heck, Koç University, MS in Optoelectronics and Photonics Engineering, August 2013
Thesis Title: Numerical Modeling of Dispersive and Nonlinear Pulse Distortions in a Cr2+:ZnSe Regenerative Amplifier
11) Can Cihan, Koç University, MS in Optoelectronics and Photonics Engineering, September 2013
Thesis Title: Development of High Repetition Rate Cr:LiCAF Femtosecond Lasers and Application of Multipass-Cavity Ti:Sapphire Lasers in THz Generation
12) Ferda Canbaz, Koç University, MS in Optoelectronics and Photonics Engineering, September 2013
Thesis Title: Sub–15 Femtosecond Pulse Generation From a Kerr–Lens Mode–Locked Cr:LiSAF Laser Near 850 nm with a Gain–Matched Output Coupler
13) Gökhan Tanısalı, Koç University, MS in Physics, January 2020
Thesis Title: Generation of 21-fs Pulses from a Cr:LiSAF Laser Mode Locked with a Single-Walled Carbon Nanotube Saturable Absorber
14) Minahil Khan, Koç University, MS in Materials Science and Engineering, January 2022
Thesis Title: Wavelength Dependent Photothermal Conversion Efficiency of Photosensitizers for Photothermal Therapy
15) Suat İçli, Koç University, MS in Physics, Co-advisor: Prof. Umut Aydemir, July 2023
Thesis Title: Investigation of the continuous-wave and pulsed operation of emerging thulium ion-doped laser media around 2000 nm and preparation of ZnS and ZnSe host materials
16) Faik Derya İnce, MS in Materials Science and Engineering, July 2023
Thesis Title: Femtosecond Laser Fabrication and Optical Characterization of Low-Loss Diamond Waveguides
Former Graduate Students
Işınsu Baylam, PhD in Physics
İsmail Yorulmaz, PhD in Materials Science and Engineering
Ferda Canbaz, PhD in Physics
Can Cihan, PhD in Electrical-Electronics Engineering
Group Pictures
Koç University Laser Research Laboratory, Emirgan, January 2014
Koç University Laser Research Laboratory, Advanced Solid-State Lasers Congress, Paris, France, October-November 2013
Koç University Laser Research Laboratory, Kadıköy, September 2012
Koç University Laser Research Laboratory, Spring 2011
(Koç University Laser Research Laboratory, Prof. Sarper Özharar and Işınsu Baylam, October 21, 2011)
Ersen Beyatlı and İsmail Yorulmaz
(Koç University Laser Research Laboratory, Ferda Canbaz and Cem Yetişmişoğlu, October 21, 2011)
(Koç University Laser Research Laboratory, Natali Çizmeciyan and Hüseyin Çankaya, June 24, 2011)
(Işınsu Baylam, Fotonik 2013 Conference, Aselsan, Ankara, September 2013)
(Ferda Canbaz, Fotonik 2013 Conference, Aselsan, Ankara, September 2013)
(KU Laser Research Laboratory, Ersen Beyatlı and İsmail Yorulmaz)
(Koç University, Laser Research Laboratory, Garipçe, Spring 2012)
(Koç University Laser Research Laboratory, Spring 2012)
(Natali Çizmeciyan, Koç University Surface Science and Technology Research Center)
- After the MS thesis defense of Ferda Canbaz and Can Cihan, September 2013
(June 2004, KU Commencement Ceremony with Hüseyin Çankaya)
(International Laser Physics Conference, Trondheim, Norway, July 2008, with Hüseyin Çankaya)
(Serhat Tozburun and Hüseyin Çankaya)
(Ümit Demirbaş)
(Koç University, Commencement Ceremony, June 2009, with Natali Çizmeciyan)
(With Hüseyin Çankaya and Adil Tolga Görgülü, 2011 Koç University graduation ceremony, June 25, 2011)
(With Dr. Hüseyin Çankaya after his PhD thesis defense, August 12, 2011)
(With Dr. Ersen Beyatlı after his PhD thesis defense, January 22, 2014)