Browsing Τμήμα Φυσικής / Department of Physics by Subject "Absorption"

Now showing items 1-17 of 17

    • Article  

      Carrier dynamics in InS nanowires grown via chemical vapor deposition 

      Othonos, Andreas S.; Zervos, Matthew (2010)
      Transient femtosecond absorption spectroscopy and timecorrelating single photon counting (TCSPC) photoluminescence (PL) were employed to study InS nanowires (NWs) grown by chemical vapor deposition (CVD) and determine the ...
    • Article  

      Carrier relaxation dynamics in SnxNy nanowires grown by chemical vapor deposition 

      Othonos, Andreas S.; Zervos, Matthew (2009)
      Carrier relaxation dynamics in tin nitride (SnxNy) nanowires have been investigated using femtosecond transient absorption spectroscopy. The nanowires were grown directly on quartz using chemical vapor deposition and had ...
    • Article  

      Defect states of chemical vapor deposition grown GaN nanowires: Effects and mechanisms in the relaxation of carriers 

      Tsokkou, Demetra; Othonos, Andreas S.; Zervos, Matthew (2009)
      Carrier relaxation in GaN nanowires, grown by atmospheric pressure chemical vapor deposition, via direct nitridation of Ga with NH3 at 950 °C has been investigated in detail. Differential absorption measurements reveal a ...
    • Article  

      Direct observation of excitons in polymer/carbon nanotube composites at room temperature: The influence of nanotube concentration 

      Lioudakis, Emmanouil E.; Kanari, C.; Othonos, Andreas S.; Alexandrou, Ioannis (2008)
      In this work, we have employed spectroscopic ellipsometry technique to study the optical properties of polymer/carbon nanotube (CN) composites as a function of nanotube concentration. Using a two-layer structural model ...
    • Article  

      Femtosecond carrier dynamics in In 2O 3 nanocrystals 

      Othonos, Andreas S.; Zervos, Matthew; Tsokkou, Demetra (2009)
      We have studied carrier dynamics in In 2O 3 nanocrystals grown on a quartz substrate using chemical vapor deposition. Transient differential absorption measurements have been employed to investigate the relaxation dynamics ...
    • Article  

      Femtosecond dynamics in single wall carbon nanotube/poly(3-hexylthiophene) composites 

      Lioudakis, Emmanouil E.; Othonos, Andreas S.; Alexandrou, Ioannis (2008)
      Femtosecond transient absorption measurements on single wall carbon nanotube/poly(3-hexylthiophene) composites are used to investigate the relaxation dynamics of this blended material. The influence of the addition of ...
    • Article  

      Hybrid inorganic/organic semiconductor heterostructures with efficient non-radiative energy transfer 

      Heliotis, G.; Itskos, Grigorios; Murray, R.; Dawson, M. D.; Watson, I. M.; Bradley, D. D. C. (2006)
      A hybrid inorganic/organic semiconductor structure employing a polyfluorene thin films with Efficient non-radiative Förster resonant energy transfer (FRET) was fabricated. FRET is mediated by dipole-dipole interactions, ...
    • Article  

      Linear dynamic polarizability and the absorption spectrum of an exciton in a quantum ring in a magnetic field 

      Ghazaryan, A. V.; Djotyan, Anahit P.; Moulopoulos, Konstantinos; Kirakosyan, Albert A. (2011)
      The problem of an electron-hole system interacting through a contact potential and moving in a one-dimensional quantum ring threaded by an Aharonov-Bohm flux is considered, with respect to the system's energetics as well ...
    • Article  

      Monitoring charge exchange in P3HT-nanotube composites using optical and electrical characterisation 

      Alexandrou, Ioannis; Lioudakis, Emmanouil E.; Delaportas, Dimitrios; Zhao, C. Z.; Othonos, Andreas S. (2009)
      Charge exchange at the bulk heterojunctions of composites made by mixing single wall nanotubes (SWNTs) and polymers show potential for use in optoelectronic devices such as solar cells and optical sensors. The density/total ...
    • Article  

      Search for Bs 0 → μ+μ - and Bd 0 → μ+μ - decays in pp̄ collisions at √s = 1.96 TeV 

      Acousta, D.; Affolder, T.; Akimoto, T.; Albrow, M. G.; Ambrose, D.; Amerio, S.; Amidei, D.; Anastassov, A.; Anikeev, K.; Annovi, A.; Antos, J.; Aoki, M.; Apollinari, G.; Arisawa, T.; Arguin, J. -F; Artikov, A.; Ashmanskas, W.; Attal, A.; Azfar, F.; Azzi-Bacchetta, P.; Bacchetta, N.; Bachacou, H.; Badgett, W.; Barbaro-Galtieri, A.; Barker, G. J.; Barnes, V. E.; Barnett, B. A.; Baroiant, S.; Barone, M.; Bauer, G.; Bedeschi, F.; Behari, S.; Belforte, S.; Bellettini, G.; Bellinger, J.; Benjamin, D.; Beretvas, Andrew; Bhatti, A.; Binkley, M.; Bisello, D.; Bishai, M.; Blair, R. E.; Blocker, C.; Bloom, K.; Blumenfeld, B.; Bocci, A.; Bodek, A.; Bolla, G.; Bolshov, A.; Booth, P. S. L.; Bortoletto, D.; Boudreau, J.; Bourov, S.; Bromberg, C.; Brubaker, E.; Budagov, J.; Budd, H. S.; Burkett, K.; Busetto, G.; Bussey, P.; Byrum, K. L.; Cabrera, S.; Calafiura, P.; Campanelli, M.; Campbell, M.; Canepa, A.; Casarsa, M.; Carlsmith, D.; Carron, S.; Carosi, R.; Castro, A.; Catastini, P.; Cauz, D.; Cerri, A.; Cerri, C.; Cerrito, L.; Chapman, J.; Chen, C.; Chen, Y. C.; Chertok, M.; Chiarelli, G.; Chlachidze, G.; Chlebana, F.; Cho, I.; Cho, K.; Chokheli, D.; Chu, M. L.; Chuang, S.; Chung, J. Y.; Chung, W. H.; Chung, Y. S.; Ciobanu, C. I.; Ciocci, M. A.; Clark, A. G.; Clark, D.; Coca, M.; Connolly, A.; Convery, M.; Conway, J.; Cordelli, M.; Cortiana, G.; Cranshaw, J.; Cuevas, J.; Culbertson, R.; Currat, C.; Cyr, D.; Dagenhart, D.; da Ronco, S.; D'Auria, S.; de Barbaro, P.; de Cecco, S.; De Lentdecker, Gilles; Dell'Agnello, Simone; Dell'Orso, M.; Demers, S.; Demortier, L.; Dininno, M.; de Pedis, D.; Derwent, P. F.; Devlin, T.; Dionisi, Carlo; Dittmann, J. R.; Doksus, P.; Dominguez, A.; Donati, S.; Donegà, Mauro; D'Onnofrio, M.; Dorigo, T.; Drollinger, V.; Ebina, K.; Eddy, N.; Ely, R.; Erbacher, R.; Erdmann, M.; Errede, D.; Errede, S.; Eusebi, R.; Fang, H. -C; Farrington, S.; Fedorko, I.; Feild, R. G.; Feindt, M.; Fernandez, J. P.; Ferretti, C.; Field, R. D.; Fiori, I.; Flanagan, G.; Flaugher, B.; Flores-Castillo, L. R.; Foland, A.; Forrester, S.; Foster, G. W.; Franklin, M.; Frisch, H.; Fujii, Y.; Furic, I.; Gajjar, A.; Gallas, A.; Galyardt, J.; Gallinaro, M.; Garcia-Sciveres, M.; Garfinkel, A. F.; Gay, C.; Gerberich, H.; Gerdes, D. W.; Gerchtein, E.; Giagu, S.; Giannetti, P.; Gibson, A.; Gibson, K.; Ginsburg, C.; Giolo, K.; Giordani, M.; Giurgiu, G.; Glagolev, V.; Glenzinski, D.; Gold, M.; Goldschmidt, N.; Goldstein, D.; Goldstein, J.; Gomez, G.; Gomez-Ceballos, G.; Gondcharov, M.; González, O.; Gorelov, I.; Goshaw, A. T.; Gotra, Y.; Goulianos, Konstantin; Gresele, A.; Grosso-Pilcher, C.; Guenther, M.; Guimaraes da Costa, J.; Haber, C.; Hahn, K.; Hahn, S. R.; Halkiadakis, Eva; Handler, R.; Happacher, F.; Hara, K.; Hare, M.; Harr, R. F.; Harris, R. M.; Hartmann, F.; Hatakeyama, K.; Hauser, J.; Hays, C.; Hayward, H.; Heider, E.; Heinemann, B.; Heinrich, J.; Hennecke, M.; Herndon, M.; Hill, C.; Hirschbuehl, D.; Hocker, A.; Hoffman, K. D.; Holloway, A.; Hou, S.; Houlden, M. A.; Huffman, B. T.; Huang, Y.; Hughes, R. E.; Huston, J.; Ikado, K.; Incandela, J.; Introzzi, G.; Iori, M.; Ishizawa, Y.; Issever, C.; Ivanov, A.; Iwata, Y.; Iyutin, B.; James, E.; Jang, D.; Jarrell, J.; Jeans, D.; Jensen, H.; Jeon, E. J.; Jones, M.; Joo, K. K.; Jun, S.; Junk, T.; Kamon, T.; Kang, J.; Karagoz Unel, M.; Karchin, P. E.; Kartal, S.; Kato, Y.; Kemp, Y.; Kephart, R.; Kerzel, U.; Khotilovich, V.; Kilminster, B.; Kim, D. H.; Kim, H. S.; Kim, J. E.; Kim, M. J.; Kim, M. S.; Kim, S. B.; Kim, S. H.; Kim, T. H.; Kim, Y. K.; King, B. T.; Kirby, M.; Kirsch, L.; Klimenko, S.; Knuteson, B.; Ko, B. R.; Kobayashi, H.; Koehn, P.; Kong, D. J.; Kondo, K.; Kongisberg, J.; Kordas, K.; Korn, A.; Korytov, A.; Kotelnikov, K.; Kotwal, A. V.; Kovalev, A.; Kraus, J.; Kravchenko, I.; Kreymer, A.; Kroll, J.; Kruse, M.; Krutelyov, V.; Kuhlmann, S. E.; Kuznetsova, N.; Laasanen, A. T.; Lai, S.; Lami, S.; Lammel, S.; Lancaster, J.; Lancaster, M.; Lander, R.; Lannon, K.; Lath, A.; Latino, G.; Lauhakangas, R.; Lazzizzera, I.; Le, Y.; Lecci, C.; LeCompte, T.; Lee, J.; Lee, S. W.; Leonardo, N.; Leone, S.; Lewis, J. D.; Li, K.; Lin, C.; Lin, C. S.; Lindgren, M.; Liss, T. M.; Litvintsev, D. O.; Liu, T.; Liu, Y.; Lockyer, N. S.; Loginov, A.; Loreti, M.; Loverre, P.; Lu, R. -S; Lucchesi, D.; Lukens, P.; Lyons, L.; Lys, J.; Lysak, R.; MacQueen, D.; Madrak, R.; Maeshima, K.; Maksimovic, P.; Malferrari, L.; Manca, G.; Marginean, R.; Martin, M.; Martin, A.; Martin, V.; Martiínez, M.; Maruyama, T.; Matsunaga, H.; Mattson, M.; Mazzanti, P.; McFarland, K. S.; McGivern, D.; McIntyre, P. M.; McNamara, P.; McNulty, R.; Menzemer, S.; Menzione, A.; Merkel, P.; Mesropian, C.; Messina, A.; Miao, T.; Miladinovic, N.; Miller, L.; Miller, R.; Miller, J. S.; Miquel, R.; Miscetti, S.; Mitselmakher, G.; Miyamoto, A.; Miyazaki, Y.; Moggi, N.; Mohr, B.; Moore, R.; Morello, M.; Moulik, T.; Mukherjee, A.; Mulhearn, M.; Muller, T.; Mumford, R.; Munar, A.; Murat, P.; Nachtman, J.; Nahn, S.; Nakamura, I.; Nakano, I.; Napier, A.; Napora, R.; Naumov, D.; Necula, V.; Niell, F.; Nielsen, J.; Nelson, C.; Nelson, T.; Neu, C.; Neubauer, M. S.; Newman-Holmes, C.; Nicollerat, A. -S; Nigmanov, T.; Nodulman, L.; Oesterberg, K.; Ogawa, T.; Oh, S.; Oh, Y. D.; Ohsugi, T.; Okusawa, T.; Oldeman, R.; Orava, R.; Orejudos, W.; Pagliarone, C.; Palmonari, F.; Paoletti, R.; Papadimitriou, Vaia; Pashapour, S.; Patrick, J.; Pauletta, G.; Paulini, M.; Pauly, T.; Paus, C.; Pellett, D.; Penzo, A.; Phillips, T. J.; Piacentino, G.; Piedra, J.; Pitts, K. T.; Plager, C.; Pompoš, A.; Pondrom, L.; Pope, G.; Poukhov, O.; Prakoshyn, F.; Pratt, T.; Pronko, A.; Proudfoot, J.; Ptohos, Fotios; Punzi, G.; Rademacker, J.; Rakitine, A.; Rappoccio, S.; Ratnikov, F.; Ray, H.; Reichold, A.; Rekovic, V.; Renton, P.; Rescigno, M.; Rimondi, F.; Rinnert, K.; Ristori, L.; Robertson, W. J.; Robson, A.; Rodrigo, T.; Rolli, S.; Rosenson, L.; Roser, R.; Rossin, R.; Rott, C.; Russ, J.; Ruiz, A.; Ryan, D.; Saarikko, H.; Safonov, A.; Denis, R. S.; Sakumoto, W. K.; Salamanna, G.; Saltzberg, D.; Sanchez, C.; Sansoni, A.; Santi, L.; Sarkar, S.; Sato, K.; Savard, P.; Schemitz, P.; Schlabach, P.; Schmidt, E. E.; Schmidt, M. P.; Schmitt, M.; Scodellaro, L.; Sfiligoi, I.; Shears, T.; Scribano, A.; Scuri, F.; Sefov, A.; Seidel, S.; Seiya, Y.; Semeria, F.; Sexton-Kennedy, L.; Shapiro, M. D.; Shepard, P. F.; Shimojima, M.; Shochet, M.; Shon, Y.; Shreyber, I.; Sidoti, A.; Siket, M.; Sill, A.; Sinervo, P.; Sisakyan, A.; Skiba, A.; Slaughter, A. J.; Sliwa, K.; Smith, J. R.; Snider, F. D.; Snihur, R.; Somalwar, S. V.; Spalding, J.; Spezziga, M.; Spiegel, L.; Spinella, F.; Spiropulu, Maria; Squillacioti, P.; Stadie, H.; Stefanini, A.; Stelzer, B.; Stelzer-Chilton, O.; Strologas, John; Stuart, D.; Sukhanov, A.; Sumorok, K.; Sun, H.; Suzuki, T.; Taffard, A.; Tafirout, R.; Takach, S. F.; Takano, H.; Takashima, R.; Takeuchi, Y.; Takikawa, K.; Tanaka, M.; Tanaka, R.; Tanimoto, N.; Tapprogge, S.; Tecchio, M.; Teng, P. K.; Terashi, K.; Tesarek, R. J.; Tether, S.; Thom, J.; Thompson, A. S.; Thomson, E.; Tipton, P.; Tiwari, V.; Tkaczyk, S.; Toback, D.; Tollefson, K.; Tonelli, D.; Tonnesmann, M.; Torre, S.; Torretta, D.; Trischuk, W.; Tseng, J.; Tsuchiya, R.; Tsuno, S.; Tsybychev, D.; Turini, N.; Turner, M.; Ukegawa, F.; Unverhau, T.; Uozumi, S.; Usynin, D.; Vacavant, L.; Vaiciulis, A.; Varganov, A.; Vataga, E.; Vejcik, S.; Velev, G.; Veramendi, G.; Vickey, T.; Vidal, R.; Vila, I.; Vilar, R.; Volobouev, I.; von der Mey, M.; Wagner, R. G.; Wagner, R. L.; Wagner, W.; Wallny, R.; Walter, T.; Yamashita, T.; Yamamoto, K.; Wan, Z.; Wang, M. J.; Wang, S. M.; Warburton, A.; Ward, B.; Waschke, S.; Waters, D.; Watts, T.; Weber, M.; Wester, W. C.; Whitehouse, B.; Wicklund, A. B.; Wicklund, E.; Williams, H. H.; Wilson, P.; Winer, B. L.; Wittich, P.; Wolbers, S.; Wolter, M.; Worcester, M.; Worm, S.; Wright, T.; Wu, X.; Würthwein, F.; Wyatt, A.; Yagil, A.; Yang, U. K.; Yao, W.; Yeh, G. P.; Yi, K.; Yoh, J.; Yoon, P.; Yorita, K.; Yoshida, T.; Yu, I.; Yu, S.; Yu, Z.; Yun, J. C.; Zanello, L.; Zanetti, A.; Zaw, I.; Zetti, F.; Zhou, J.; Žsenei, A.; Zucchelli, S. (2004)
      The decay mechanisms of Bs 0 → μ +μ- and Bd 0 → μ +μ- in pp̄ collisions were investigated. For discrimination of the decays from background events, four variables were used such as invariant mass of muon pair, B-candidate ...
    • Article  

      Surface-related states in oxidized silicon nanocrystals enhance carrier relaxation and inhibit auger recombination 

      Othonos, Andreas S.; Lioudakis, Emmanouil E.; Nassiopoulou, Androula Galiouna (2008)
      We have studied ultrafast carrier dynamics in oxidized silicon nanocrystals (NCs) and the role that surface-related states play in the various relaxation mechanisms over a broad range of photon excitation energy corresponding ...
    • Article  

      Tin oxide nanowires: The influence of trap states on ultrafast carrier relaxation 

      Othonos, Andreas S.; Zervos, Matthew; Tsokkou, Demetra (2009)
      We have studied the optical properties and carrier dynamics in SnO 2 nanowires (NWs) with an average radius of 50 nm that were grown via the vapor-liquid solid method. Transient differential absorption measurements have ...
    • Article  

      Transient photoinduced absorption in ultrathin as-grown nanocrystalline silicon films 

      Lioudakis, Emmanouil E.; Othonos, Andreas S.; Lioutas, Ch B.; Vouroutzis, N. (2008)
      We have studied ultrafast carrier dynamics in nanocrystalline silicon films with thickness of a few nanometers where boundary-related states and quantum confinement play an important role. Transient non-degenerated ...
    • Article  

      Ultrafast carrier dynamics in band edge and broad deep defect emission ZnSe nanowires 

      Othonos, Andreas S.; Lioudakis, Emmanouil E.; Philipose, U.; Ruda, H. E. (2007)
      Ultrafast carrier dynamics of ZnSe nanowires grown under different growth conditions have been studied. Transient absorption measurements reveal the dependence of the competing effects of state filling and photoinduced ...
    • Article  

      Ultrafast carrier relaxation in inn nanowires grown by reactive vapor transport 

      Othonos, Andreas S.; Zervos, Matthew; Pervolaraki, Maria (2009)
      We have studied femtosecond carrier dynamics in InN nanowires grown by reactive vapor transport. Transient differential absorption measurements have been employed to investigate the relaxation dynamics of photogenerated ...
    • Article  

      Ultrafast time-resolved spectroscopy of Si nanocrystals embedded in SiO2 matrix 

      Lioudakis, Emmanouil E.; Emporas, A.; Othonos, Andreas S.; Nassiopoulou, Androula Galiouna (2009)
      In this work, we present a comprehensive study of ultrafast transient photoinduced absorption of silicon nanocrystals (NCs) embedded in SiO2 matrix. The samples under investigation are single monolayers of Si-NCs embedded ...
    • Article  

      Ultrafast time-resolved spectroscopy of ZnSe nanowires: Carrier dynamics of defect-related states 

      Othonos, Andreas S.; Lioudakis, Emmanouil E.; Tsokkou, Demetra; Philipose, U.; Ruda, H. E. (2009)
      In recent years, ZnSe nanowires have been widely investigated for their potential applications in optoelectronics. A typical room temperature photoluminescence spectrum of ZnSe nanowires grown by vapor-liquid-solid growth ...