Bloch-phonon coupling and tunneling-induced coherent phonon excitation in semiconductor superlattices
Identifieur interne : 00C644 ( Main/Repository ); précédent : 00C643; suivant : 00C645Bloch-phonon coupling and tunneling-induced coherent phonon excitation in semiconductor superlattices
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Abstract
The coupling of Bloch oscillations to longitudinal optical phonons is investigated in a narrow-well In0.53Ga0.47As/In0.52Al0.48As superlattice. A strong increase of coherent phonon amplitudes is observed when the Bloch oscillations are subsequently tuned into resonance with different optical phonon modes. The rapid dephasing of the Bloch oscillations due to field induced tunneling from the weakly bound miniband into above-barrier continuum states leads to an additional and new excitation process of coherent phonons in superlattices at high electric fields. Polarization dependent measurements confirm their generation via Coulomb interaction excluding any contribution through impulsively stimulated Raman scattering.
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Forst</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Institut fur Halbleitertechnik, Rheinisch-Westfalische Technische Hochschule Aachen, D-52074 Aachen, Germany</s1><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institut fur Halbleitertechnik, Rheinisch-Westfalische Technische Hochschule Aachen, D-52074 Aachen</wicri:regionArea><placeName><region type="land" nuts="1">Rhénanie-du-Nord-Westphalie</region><region type="district" nuts="2">District de Cologne</region><settlement type="city">Aix-la-Chapelle</settlement></placeName></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Institut fur Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, D-01314 Dresden, Germany</s1></inist:fA14><country xml:lang="fr">Allemagne</country><wicri:regionArea>Institut fur Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, D-01314 Dresden</wicri:regionArea><wicri:noRegion>01314 Dresden</wicri:noRegion><wicri:noRegion>D-01314 Dresden</wicri:noRegion></affiliation><affiliation wicri:level="2"><inist:fA14 i1="03"><s1>U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783</s1></inist:fA14><country xml:lang="fr">États-Unis</country><placeName><region type="state">Maryland</region></placeName><wicri:cityArea>U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi</wicri:cityArea></affiliation></author><author><name sortKey="Kurz, H" uniqKey="Kurz H">H. 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B, Condensed matter and materials physics</title></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aluminium compounds</term><term>Electron-phonon interactions</term><term>Experimental study</term><term>Gallium arsenides</term><term>III-V semiconductors</term><term>Indium compounds</term><term>Interface phonons</term><term>Semiconductor superlattices</term><term>Tunnel effect</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>7321</term><term>7847</term><term>6320</term><term>Etude expérimentale</term><term>Indium composé</term><term>Gallium arséniure</term><term>Aluminium composé</term><term>Semiconducteur III-V</term><term>Superréseau semiconducteur</term><term>Phonon interface</term><term>Effet tunnel</term><term>Interaction électron phonon</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The coupling of Bloch oscillations to longitudinal optical phonons is investigated in a narrow-well In<sub>0.53</sub>Ga<sub>0.47</sub>As/In<sub>0.52</sub>Al<sub>0.48</sub>As superlattice. A strong increase of coherent phonon amplitudes is observed when the Bloch oscillations are subsequently tuned into resonance with different optical phonon modes. The rapid dephasing of the Bloch oscillations due to field induced tunneling from the weakly bound miniband into above-barrier continuum states leads to an additional and new excitation process of coherent phonons in superlattices at high electric fields. Polarization dependent measurements confirm their generation via Coulomb interaction excluding any contribution through impulsively stimulated Raman scattering.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>1098-0121</s0></fA01><fA02 i1="01"><s0>PRBMDO</s0></fA02><fA03 i2="1"><s0>Phys. rev., B, Condens. matter mater. phys.</s0></fA03><fA05><s2>67</s2></fA05><fA06><s2>8</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Bloch-phonon coupling and tunneling-induced coherent phonon excitation in semiconductor superlattices</s1></fA08><fA11 i1="01" i2="1"><s1>FORST (M.)</s1></fA11><fA11 i1="02" i2="1"><s1>KURZ (H.)</s1></fA11><fA11 i1="03" i2="1"><s1>DEKORSY (T.)</s1></fA11><fA11 i1="04" i2="1"><s1>LEAVITT (R. P.)</s1></fA11><fA14 i1="01"><s1>Institut fur Halbleitertechnik, Rheinisch-Westfalische Technische Hochschule Aachen, D-52074 Aachen, Germany</s1><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></fA14><fA14 i1="02"><s1>Institut fur Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, D-01314 Dresden, Germany</s1></fA14><fA14 i1="03"><s1>U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783</s1></fA14><fA20><s2>085305-085305-4</s2></fA20><fA21><s1>2003-02-15</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>144 B</s2></fA43><fA44><s0>8100</s0><s1>© 2003 American Institute of Physics. All rights reserved.</s1></fA44><fA47 i1="01" i2="1"><s0>03-0152113</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Physical review. 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