Browsing by Author "Elmali, A."

Now showing items 1-7 of 7

    • Attractive versus repulsive excitonic interactions of colloidal quantum dots control blue-to red-shifting (and non-shifting) amplified spontaneous emission 

      Cihan, A. F.; Kelestemur, Y.; Guzelturk, B.; Yerli, O.; Kurum, U.; Yaglioglu, H. G.; Elmali, A.; Demir, Hilmi Volkan (American Chemical Society, 2013-11-21)
      Tunable, high-performance, two-photon absorption (TPA)-based amplified spontaneous emission (ASE) from near-unity quantum efficiency colloidal quantum dots (CQDs) is reported. Besides the absolute spectral tuning of ASE, ...

    • Blue-and red-shifting amplified spontaneous emission of CdSe/CdS core/shell colloidal quantum dots 

      Kelestemur, Yusuf; Cihan, Ahmet Fatih; Güzeltürk, Burak; Yerli, Ozan; Kurum, U.; Yaglioglu H.G.; Elmali, A.; Demir, Hilmi Volkan (IEEE, 2013)
      We report blue- and red-shifting amplified spontaneous emission of CdSe/CdS quantum dots, controlled by varying core/shell dimensions and modifying exciton-exciton interactions, with low optical gain threshold of two-photon ...

    • Crystallization of Ge in SiO2 matrix by femtosecond laser processing 

      Salihoglu, O.; Kürüm, U.; Yaglioglu, H. G.; Elmali, A.; Aydınlı, Atilla (American Vacuum Society, 2012-01-19)
      Germanium nanocrystals embedded in a siliconoxide matrix has been fabricated by single femtosecond laser pulse irradiation of germanium doped SiO2 thin films deposited with plasma enhanced chemical vapor deposition. SEM ...

    • Electrochemically tunable ultrafast optical response of graphene oxide 

      Kürüm, U.; Ekiz, O. Ö.; Yaglioglu, H. G.; Elmali, A.; Ürel, M.; Güner, H.; Mızrak, A. K.; Ortaç, B.; Dâna, A. (A I P Publishing LLC, 2011)
      We demonstrate reversible and irreversible changes in the ultrafast optical response of multilayer graphene oxide thin films upon electrical and optical stimulus. The reversible effects are due to electrochemical modification ...

    • Encapsulation of a zinc phthalocyanine derivative in self-assembled peptide nanofibers 

      Garifullin, R.; Erkal, T. S.; Tekin, S.; Ortaç, B.; Gürek, A. G.; Ahsen, V.; Yaglioglu, H. G.; Elmali, A.; Güler, Mustafa O. (The Royal Society of Chemistry, 2012)
      In this article, we demonstrate encapsulation of octakis(hexylthio) zinc phthalocyanine molecules by non-covalent supramolecular organization within self-assembled peptide nanofibers. Peptide nanofibers containing ...

    • Femtosecond laser crystallization of amorphous Ge 

      Salihoglu, O.; Kürüm, U.; Yaglıoglu, G. H.; Elmali, A.; Aydınlı, Atilla (American Institute of Physics, 2011)
      Ultrafast crystallization of amorphous germanium (a-Ge) in ambient has been studied. Plasma enhanced chemical vapor deposition grown a-Ge was irradiated with single femtosecond laser pulses of various durations with a range ...

    • Probing ultrafast energy transfer between excitons and plasmons in the ultrastrong coupling regime 

      Balci, S.; Kocabas, C.; Küçüköz, B.; Karatay, A.; Akhüseyin, E.; Yaglioglu, H. G.; Elmali, A. (American Institute of Physics Inc., 2014)
      We investigate ultrafast energy transfer between excitons and plasmons in ensembles of core-shell type nanoparticles consisting of metal core covered with a concentric thin J-aggregate (JA) shell. The high electric field ...