Auflistung nach Schlagwort "Phonons"

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  • Absorption and multi-phonon quenching in nanocrystal doped SiO2 fibers 
    Steinke, Michael; Spelthann, Simon; Rühl, Axel; Ristau, Detlev (Washington, DC : Optica, 2021)
    SiO2 fibers doped with rare-earth-doped nanocrystals are promising to overcome the strong SiO2 multi-phonon quenching and could yield novel laser gain materials. So far, no attention has been paid to the question how well ...
  • Algorithmic Ground-State Cooling of Weakly Coupled Oscillators Using Quantum Logic 
    King, Steven A.; Spieß, Lukas J.; Micke, Peter; Wilzewski, Alexander; Leopold, Tobias; Crespo López-Urrutia, José R.; Schmidt, Piet O. (College Park, Md. : APS, 2021)
    The majority of ions and other charged particles of spectroscopic interest lack the fast, cycling transitions that are necessary for direct laser cooling. In most cases, they can still be cooled sympathetically through ...
  • Low Temperature Relaxation of Donor Bound Electron Spins in Si 28: P 
    Sauter, E.; Abrosimov, N.V.; Hübner, J.; Oestreich, M. (College Park, Md. : APS, 2021)
    We measure the spin-lattice relaxation of donor bound electrons in ultrapure, isotopically enriched, phosphorus-doped Si28:P. The optical pump-probe experiments reveal at low temperatures extremely long spin relaxation ...
  • Massive surface-plasmon polaritons 
    Chichkov, Nikolai B.; Evlyukhin, Andrey B.; Chichkov, Boris N. (Berlin : de Gruyter, 2021)
    It is well-known that a quantum of light (photon) has a zero mass in vacuum. Entering into a medium the photon creates a quasiparticle (polariton, plasmon, surface-phonon, surface-plasmon polariton, etc.) whose rest mass ...
  • Phonon excitations of composite-fermion Landau levels 
    Schulze-Wischeler, F.; Hohls, Frank; Zeitler, U.; Reuter, D.; Wieck, A.D.; Haug, Rolf J. (College Park, MD : American Physical Society, 2004)
    The phonon excitations of fractional quantum Hall (FQH) states at filling factors ν =1÷3,2÷5, 4÷7, 3÷5, 4÷3, and 5÷3 were investigated. The excitations were found to be based on Landau-level transitions of composite fermions ...
  • Picosecond near-to-mid-infrared absorption of pulse-injected small polarons in magnesium doped lithium niobate 
    Freytag, Felix; Booker, Philip; Corradi, Gabor; Messerschmidt, Simon; Krampf, Andreas; Imlau, Mirco (Washington, DC : Optical Society of America, 2018)
    Femtosecond-pulse-induced (Epump = 2:5 eV) picosecond infrared absorption is studied in the spectral region between 0.30 eV and 1.05 eV in LiNbO3:Mg. We find a noninstantaneous mid-infrared absorption peak in the time ...
  • Resonant optical excitation of longitudinal-optical phonons and intermixing in InAsAlAs single quantum dots 
    Sarkar, D.; Van Der Meulen, H.P.; Calleja, J.M.; Meyer, J.M.; Haug, Rolf J.; Pierz, Klaus (College Park, MD : American Institute of Physics, 2008)
    Excitations of a single InAsAlAs self-assembled quantum dot were investigated by photoluminescence excitation spectroscopy. Resonant absorption by longitudinal-optical (LO) phonons of the quantum dot and the barriers is ...
  • Thermodynamic origin of the slow free exciton photoluminescence rise in GaAs 
    Beck, Michael; Hübner, Jens; Oestreich, Michael; Bieker, S.; Henn, T.; Kiessling, T.; Ossau, W.; Molenkamp, L.W. (College Park, MD : American Physical Society, 2016)
    We use time-resolved photoluminescence (TRPL) spectroscopy to unequivocally clarify the microscopic origin of the nanosecond free exciton photoluminescence rise in GaAs at low temperatures. In crucial distinction from ...