Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Michael P. Hasselbeck"'
Publikováno v:
physica status solidi c. 5:253-256
We use ultrafast THz spectroscopy to study Landau damping in a coherent plasma system. A series of InSb-based bulk heterostructures provide increasing spatial confinement that restricts the scattering wave vector in the electron-electron interaction.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95b8b6ceb58a6ef943f98a7c167d80f5
https://doi.org/10.1002/pssc.200776534
https://doi.org/10.1002/pssc.200776534
Publikováno v:
Optics Communications. 227:337-341
The linear absorption spectra of GaP, TiO 2 , ZnSe, and ZnS are measured in their transparency range using a two-color, excite-probe Z -scan. ZnS has the lowest absorption coefficient (∼10 −5 cm −1 ) in the wavelength range 840–900 nm, making
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::180ccae0023c88034cfef61b2b7b8f90
https://doi.org/10.1016/j.optcom.2003.09.044
https://doi.org/10.1016/j.optcom.2003.09.044
Publikováno v:
Physica B: Condensed Matter. 314:158-161
The coupled plasmon–phonon system in bulk InAs is studied by ultrafast THz spectroscopy. Both upper- and lower-hybrid modes associated with coherent LO phonon and bulk plasma oscillations are identified in the radiated signals. The contribution of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25cfe8cba16cef1e61fb29c417589770
https://doi.org/10.1016/s0921-4526(01)01346-1
https://doi.org/10.1016/s0921-4526(01)01346-1
Autor:
H. Kostial, M. Joschko, Michael P. Hasselbeck, Thomas Elsaesser, Rudolf Hey, K. H. Ploog, Michael Woerner
Publikováno v:
Physical Review B. 58:10470-10474
The coherent optical response of bulk GaAs is studied after ultrafast excitation close to the band edge. Pump-probe experiments with 20-fs pulses demonstrate that coherent polarizations between heavy- and light-hole continuum states make a strong con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c80e2dcc6673622f153218589a04fd6
https://doi.org/10.1103/physrevb.58.10470
https://doi.org/10.1103/physrevb.58.10470
Autor:
P. Enders, Michael P. Hasselbeck
Publikováno v:
Physical Review B. 57:9674-9681
The Lindhard dielectric function is evaluated at nonzero temperatures with Fermi-Dirac statistics and a nonparabolic conduction band for bulk, narrow-gap semiconductors. This is used to study two problems of current interest: (i) inelastic scattering
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21196625a46b349bca02887874579823
https://doi.org/10.1103/physrevb.57.9674
https://doi.org/10.1103/physrevb.57.9674
Publikováno v:
Applied Physics Letters. 85:6116-6118
Far-infrared electromagnetic radiation is emitted by coherent plasmon oscillations in bulk (111) InSb. The oscillations are excited by near-infrared ultrashort laser pulses and characterized as a function of temperature. The coherent plasmon frequenc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d484f0b419fdd44c995c728d98aa54b
https://doi.org/10.1063/1.1840118
https://doi.org/10.1063/1.1840118
Publikováno v:
Applied Physics Letters. 85:173-175
Electromagnetic radiation is emitted by the vibrational and collective modes of an opaque solid as the result of impulsive stimulated Raman scattering. Raman scattering of near-infrared femtosecond laser pulses produces coherent longitudinal optical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01bee227da1b740b12bebcbf9359d76a
https://doi.org/10.1063/1.1769588
https://doi.org/10.1063/1.1769588
Autor:
Masahiro Goto, Hiroshi Takahashi, Nobuhiko Sarukura, Shingo Ono, Alex Quema, Michael P. Hasselbeck
Publikováno v:
Japanese Journal of Applied Physics. 43:L221-L223
We present the generation of broadband terahertz (THz) radiation using n-type InAs irradiated by ultrafast laser pulses. It is found that the high-frequency component of the THz-radiation spectrum originates from the hybrid modes of the plasmons and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d08242db522d54b65911d1c6577eff18
https://doi.org/10.1143/jjap.43.l221
https://doi.org/10.1143/jjap.43.l221
Autor:
François Léonard, Aaron M. Katzenmeyer, Chia-Yeh Li, Maria Eugenia Toimil-Molares, Denis V. Seletskiy, Jeffrey G. Cederberg, A. Alec Talin, Mansoor Sheik-Bahae, Michael P. Hasselbeck
Publikováno v:
SPIE Proceedings.
InAs nanowires have been previously shown to be efficient emitters of THz radiation, upon excitation with NIR pulses. In this work we report complementary measurements of THz radiation and reflectometry together with DC transport measurements that po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6881af4cf1e856403b620a1da102b2dd
https://doi.org/10.1117/12.907745
https://doi.org/10.1117/12.907745
Autor:
Michael P. Hasselbeck, Mansoor Sheik-Bahae, Thomas J. Rotter, Chia-Yeh Li, Kevin J. Malloy, Jerry M. Olson, Chengao Wang
Publikováno v:
SPIE Proceedings.
External quantum efficiency of semiconductor photonic devices is directly measured by wavelength-dependent laser-induced temperature change (scanning laser calorimetry) with very high accuracy. Maximum efficiency is attained at an optimum photo-excit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e5a91af512007d6680343ec1a8b02f7
https://doi.org/10.1117/12.878979
https://doi.org/10.1117/12.878979