Browsing by Author "Delikanlı, Savaş"

Now showing items 1-20 of 28

    • All-optical control of exciton flow in a colloidal quantum well complex 

      Yu, J.; Sharma, Manoj; Sharma, A.; Delikanlı, Savaş; Demir, Hilmi Volkan; Dang, C. (Springer Nature, 2020)
      Excitonics, an alternative to romising for processing information since semiconductor electronics is rapidly approaching the end of Moore’s law. Currently, the development of excitonic devices, where exciton flow is ...

    • Anomalous spectral characteristics of ultrathin sub-nm colloidal CdSe nanoplatelets 

      Bose S.; Delikanlı, Savaş; Yeltik, Aydan; Sharma, Manoj; Erdem, Onur; Dang C.; Fan W.; Zhang D.H.; Demir, Hilmi Volkan (Optical Society of America, 2017)
      We demonstrate high quantum yield broad photoluminescence emission of ultrathin sub-nanometer CdSe nanoplatelets (two-monolayer). They also exhibit polarization-characterized lateral size dependent anomalous heavy hole and ...

    • Blue-emitting CdSe nanoplatelets enabled by sulfur-alloyed heterostructures for light-emitting diodes with low turn-on voltage 

      İzmir, M.; Sharma, A.; Shendre, S.; Durmuşoğlu, E. G.; Sharma, V. K.; Shabani, Farzan; Baruj, Hamed Dehghanpour; Delikanlı, Savaş; Sharma, M.; Demir, Hilmi Volkan (American Chemical Society, 2021-12-28)
      Colloidal nanoplatelets (NPLs) have emerged as the last class of semiconductor nanocrystals for their potential optoelectronic applications. The heterostructures of these nanocrystals can achieve high photoluminescence ...

    • CdSe/CdMnS nanoplatelets with bilayer core and magnetically doped shell exhibit switchable excitonic circular polarization: Implications for lasers and light-emitting diodes 

      Najafi, A.; Tarasek, S.; Delikanlı, Savaş; Zhang, P.; Norden, T.; Shendre, S.; Sharma, Manoj; Bhattacharya, A.; Taghipour, Nima; Pientka, J.; Dedmir, Hilmi Volkan; Thomay, T. (American Chemical Society, 2020-03)
      We utilized time-resolved photoluminescence (TRPL) spectroscopy to study the excitonic circular polarization (PX) from CdSe/CdMnS core/shell nanoplatelets (NPLs) with a bilayer core. This allows an extensive study of the ...

    • Coreless fiber‐based whispering‐gallery‐mode assisted lasing from colloidal quantum well solids 

      Sak, Mustafa; Taghipour, Nima; Delikanlı, Savaş; Shendre, S.; Tanrıöver, İbrahim; Gao, Y.; Yu, J.; Yanyan, Z.; Yoo, S.; Dang, C.; Demir, Hilmi Volkan; Foroutan, Sina (Wiley-VCH Verlag, 2020-01)
      Whispering gallery mode (WGM) resonators are shown to hold great promise to achieve high‐performance lasing using colloidal semiconductor nanocrystals (NCs) in solution phase. However, the low packing density of such ...

    • Deep-red-emitting colloidal quantum well light-emitting diodes enabled through a complex design of core/crown/double shell heterostructure 

      Shabani, Farzan; Dehghanpour Baruj, Hamed; Yurdakul, Iklim; Delikanlı, Savaş; Gheshlaghi, Negar; Işık, Furkan; Liu, B.; Altıntaş, Yemliha; Canımkurbey, Betül; Demir, Hilmi Volkan (Wiley, 2022-02-24)
      Extending the emission peak wavelength of quasi-2D colloidal quantum wells has been an important quest to fully exploit the potential of these materials, which has not been possible due to the complications arising from ...

    • Impurity incorporation and exchange interactions in Co2+-doped CdSe/CdS core/shell nanoplatelets 

      Fainblat, R.; Delikanlı, Savaş; Spee, L.; Czerny, T.; Işık, Furkan; Sharma, V. K.; Demir, Hilmi Volkan; Bacher, G. (American Institute of Physics, 2019)
      The intentional incorporation of transition metal impurities into colloidal semiconductor nanocrystals allows an extension of the host material’s functionality. While dopant incorporation has been extensively investigated ...

    • Inverted type-I CdS/CdSe core/crown colloidal quantum ring 

      Bose S.; Delikanlı, Savaş; Akgül, Mehmet Zafer; Gao Y.; Fan W.; Zhang D.H.; Demir, Hilmi Volkan (IEEE, 2017)
      Summary form only given. Inverted Type-I quantum rings (QRs) are a recently developed class of nanostructure in which a lower bandgap material is laterally grown as a crown of same thickness around a higher bandgap ...

    • Light-induced paramagnetism in colloidal Ag+-doped CdSe nanoplatelets 

      Najafi, A.; Sharma, Manoj; Delikanlı, Savaş; Bhattacharya, A.; Murphy, J. R.; Pientka, J.; Sharma, A.; Quinn, A. P.; Erdem, Onur; Kattel, S.; Kelestemur, Y.; Kovalenko, M. V.; Rice, W. D.; Demir, Hilmi Volkan; Petrou, A. (American Chemical Society, 2021-03-25)
      We describe a study of the magneto-optical properties of Ag+-doped CdSe colloidal nanoplatelets (NPLs) that were grown using a novel doping technique. In this work, we used magnetic circularly polarized luminescence and ...

    • Low-threshold lasing from copper-doped CdSe colloidal quantum wells 

      Yu, J.; Sharma, M.; Li, M.; Delikanlı, Savaş; Sharma, A.; Taimoor, M.; Altintas, Y.; McBride, J. R.; Kusserow, T.; Sum, T.; Demir, Hilmi Volkan (Wiley, 2021-05-04)
      Transition metal doped colloidal nanomaterials (TMDCNMs) have recently attracted attention as promising nano-emitters due to dopant-induced properties. However, despite ample investigations on the steady-state and dynamic ...

    • Low-threshold optical gain and lasing of colloidal nanoplatelets 

      Keleştemur, Yusuf; Güzeltürk, Burak; Olutaş, Murat; Delikanlı, Savaş; Demir, Hilmi Volkan (IEEE, 2014-10)
      Semiconductor nanocrystals, which are also known as colloidal quantum dots (CQDs), are highly attractive materials for high performance optoelectronic device applications such as lasers. With their size, shape and composition ...

    • Magneto-optical studies of CdSe/CdMnS/CdS core/multi-shell colloidal nanoplatelets 

      Petrou, A.; Scrace, T. A.; Murphy, J. R.; Zhang, P.; Norden, T.; Zhang, T.; Thomay, T.; Cartwright, A. N.; Delikanlı, Savaş; Akgül, Mehmet Zafer; Demir, Hilmi Volkan (SPIE, 2016)
      We studied the photoluminescence (PL)) from CdSe/CdMnS/CdS core/multi-shell colloidal nanoplatelets, a versatile platform to study the interplay of optical properties and nanomagnetism. The photoluminescence (PL) exhibits ...

    • Magneto-optics of excitons interacting with magnetic ions in CdSe/CdMnS colloidal nanoplatelets 

      Shornikova, E. V.; Yakovlev, D. R.; Tolmachev, D. O.; Ivanov, V. Y.; Kalitukha, I. V.; Sapega, V. F.; Kudlacik, D.; Kusrayev, Y. G.; Golovatenko, A. A.; Shendre, S.; Delikanlı, Savaş; Demir, Hilmi Volkan; Bayer, M. (American Chemical Society, 2020-06)
      Excitons in diluted magnetic semiconductors represent excellent probes for studying the magnetic properties of these materials. Various magneto-optical effects, which depend sensitively on the exchange interaction of the ...

    • Management of electroluminescence from silver-doped colloidal quantum well light-emitting diodes 

      Liu, Baiquan; Sharma, Manoj; Yu, Junhong; Wang, Lin; Shendre, Sushant; Sharma, Ashma; Izmir, Merve; Delikanlı, Savaş; Altıntaş, Yemliha; Dang, Cuong; Sun, Handong; Demir, Hilmi Volkan (Cell Press, 2022-05-18)
      Impurity doping is a promising strategy to afford colloidal nanocrystals exhibiting novel optical, catalytic, and electronic characteristics. However, some significant properties of noble metal-doped nanocrystals (NMD-NCs) ...

    • MoS2 phototransistor sensitized by colloidal semiconductor quantum wells 

      Sar, H.; Taghipour, Nima; Lisheshar, İ. W.; Delikanlı, Savaş; Demirtaş, M.; Demir, Hilmi Volkan; Ay, F.; Perkgöz, N. K. (Wiley-VCH Verlag, 2020-12)
      A phototransistor built by the assembly of 2D colloidal semiconductor quantum wells (CQWs) on a single layer of 2D transition metal dichalcogenide (TMD) is displayed. This hybrid device architecture exhibits high efficiency ...

    • Mutual energy transfer in a binary colloidal quantum well complex 

      Yu, J.; Sharma, Manoj; Delikanlı, Savaş; Birowosuto, M. D.; Demir, Hilmi Volkan; Dang, C. (American Chemical Society, 2019)
      Förster resonance energy transfer (FRET) is a fundamental process that is key to optical biosensing, photosynthetic light harvesting, and down-converted light emission. However, in total, conventional FRET in a donor–acceptor ...

    • Observation of optical gain from aqueous quantum well heterostructures in water 

      Delikanlı, Savaş; Durmuşoğlu, E.G.; Erdem, Onur; Shabani, Farzan; Kumar, Satish; Barujb, Hamed Dehghanpour; Demir, Hilmi Volkan; Işık, Furkan; Canımkurbey, Betül (Royal Society of Chemistry, 2022-09-25)
      Although achieving optical gain using aqueous solutions of colloidal nanocrystals as a gain medium is exceptionally beneficial for bio-optoelectronic applications, the realization of optical gain in an aqueous medium using ...

    • Optically detected magnetic resonance in CdSe/CdMnS nanoplatelets 

      Tolmachev, D. O.; Ivanov, V. Y.; Yakovlev, D. R.; Shornikova, E. V.; Witkowski, B.; Shendre, S.; Işık, Furkan; Delikanlı, Savaş; Demir, Hilmi Volkan; Bayer, M. (Royal Society of Chemistry, 2020)
      Core/shell CdSe/(Cd,Mn)S colloidal nanoplatelets containing magnetic Mn2+ ions are investigated by the optically detected magnetic resonance technique, combining 60 GHz microwave excitation and photoluminescence detection. ...

    • Persuasive evidence for electron–nuclear coupling in diluted magnetic colloidal nanoplatelets using optically detected magnetic resonance spectroscopy 

      Strassberg, R.; Delikanlı, Savaş; Barak, Y.; Dehnel, J.; Kostadinov, A.; Maikov, G.; Hernandez-Martinez, P. L.; Sharma, Manoj; Demir, Hilmi Volkan; Lifshitz, E. (American Chemical Society, 2019)
      The incorporation of magnetic impurities into semiconductor nanocrystals with size confinement promotes enhanced spin exchange interaction between photogenerated carriers and the guest spins. This interaction stimulates ...

    • Single-mode lasing from a single 7 nm thick monolayer of colloidal quantum wells in a monolithic microcavity 

      Foroutan-Barenji, Sina; Erdem, Onur; Delikanlı, Savaş; Yağcı, Hüseyin Bilge; Gheshlaghi, Negar; Altıntaş, Yemliha; Demir, Hilmi Volkan (Wiley-VCH Verlag, 2021-03-03)
      In this work, monolithically-fabricated vertical cavity surface emitting lasers (VCSELs) of densely-packed, orientation-controlled, atomically flat colloidal quantum wells (CQWs) using a self-assembly method is reported ...