Generation and Detection of Large-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>k</mml:mi></mml:math>-Vector Phonons

Colles, M. J.; Giordmaine, J. A.

doi:10.1103/physrevlett.27.670

Cited by 41 publications

(7 citation statements)

References 25 publications

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“…The attribution of the time constant z2 t o the depopulation rate of nonequilibrium phonons produced due to the decay of LO phonons amplified in EHP thus is more reasonable rll]. Accumulation of such second generation phonons (2G phonons) governing the next stage of lattice relaxation is known to be possible [16] and should hinder the depopulation process of nonequilibrium LO phonons (1G phonons) and subsequently the cooling of EHI'. The experimentally observed first stage of EHP rapid cooling seems to correspond to the equalizing of the temperatures of 1G and 2G phonons.…”

Section: Methodsmentioning

confidence: 99%

Manifestation of Hot Phonons in the Luminescence Spectra of Highly Photoexcited A^IIB^VI Crystals

Baltramiejūnas

Žukauskas

1988

Physica Status Solidi (b)

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The quasi-stationary and transiont spectra of the nonequilibriurn electron-hole plasma (EHP) emission are investigated in CdSe crystals. A broadening of the low-energy side of the luminescence band due to the heating of longitudinal-optical (LO) phonons is established. A slow stage of the EHP energy relaxstion with a time constant of 150 ps is observed and referred to the accumulation of decay products of nonequilibrium LO phonons in the narrow interval of the kspace. A model of the two-stage relaxation of the phonon subsystem in a photoexcited semiconductor is used to calculate the power of energy-loss in hot EHP and the nonequilibrium LO phonon distribution. I?C!CJlCXOBaHLI KBa3MCTaqUOHaplfblC U pa3peUICHHhle BO RpCMeHU CneKTpbI H33yqCHUfl HepaRHOBCCIIO# %JIeKTpOHHO-~bIpO~HOfi nJIa3MhI (aan) B KpMCTajlJMX CdSe. YCTalfOBJle-HO, 9TO @IUIi~iOBOJIHOBbIfi Kpaa iIO.lOCbl JIIOMHHeCUCt WMM 3,4n yUIUpHeTCJ3 113-3a pa30rpesa npoaonrm,Ix onTuqecmx (LO) @oHoiroR. 0611apyme~ uenneaimfi man penaKcaiww nHeprua 32n c nocTomrHv8 Rpeueiiu 150 ps, IiOTOPbIfi oTHeceIi I( iraKonneimm npoaymon pacIra,la HepauiroriecHux LO @OHOHOB R ~3~0 t h 06nac~u k-IIpOCTpaHCTRa. Ha OCliOBe MOileJM ,mYX3TaIIHOfi peJaKCaUMU (POHOHIIOfi nOJCHCTeMb1 (POTOB036YiKlWH-IIOI'O nOJIyIIpOROaHMKa PaCCqMTaHa MOUHOCTL 3HCpreTHqCCKUX IIOTepb rOpHqf fi 3fin M pacirpeneneme HepaBHvnecHr,Ix LO ~O H O H O B .

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Section: Methodsmentioning

confidence: 99%

Manifestation of Hot Phonons in the Luminescence Spectra of Highly Photoexcited A^IIB^VI Crystals

Baltramiejūnas

Žukauskas

1988

Physica Status Solidi (b)

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“…9 The population numbers of the acoustic phonon modes resulting from LO phonon decay in that situation have been shown to depend strongly on the pumping radiation linewidth and estimates of their values vary in different papers from 10 Ϫ2 to 10. 8,10-12 In the case under consideration, LO phonon states are produced in a much greater phase space region, which makes it valid not to take into account the uncertainty in the momentum and energy conservation laws for the LO phonon decay.…”

Section: Introductionmentioning

confidence: 99%

Stimulated decay of nonselectively pumped optical phonons in GaAs

et al. 1999

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We have considered the processes determining the steady-state population of longitudinal optical ͑LO͒ phonons being intensively produced in GaAs by electrons optically excited or accelerated in strong external electric field. The emitted LO phonons pass their energy to acoustic phonon systems through anharmonic decay into longitudinal acoustic ͑LA͒ phonons. The latter emerge as almost monoenergetic and concentrated in a narrow layer in the reciprocal space. Had the occupation numbers of k states within this layer grown to unity, the decay process would have become stimulated, effectively desolating the built-in LO states and giving rise to various nonlinear phenomena. We show that this is actually the case by tracing LA phonon kinetics and calculating the number of phonons in each k state available for feedback. The results obtained substantially clarify the physical picture of energy transfer processes mediating heat removal in GaAs.

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“…The build-up of the acoustic phonons produced by the decay of the laser pulse generating optical phonons was demonstrated in experiment [9] performed in diamond. This experiment shows that the decay of the optical phonons into the acoustic phonons can be effective.…”

Section: Introductionmentioning

confidence: 94%

Two‐stage relaxation of the electron‐phonon system in polar semiconductors

Král

Hejda

1992

Physica Status Solidi (b)

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The effect of acoustic phonon bottleneck is studied theoretically in the hot electron-phonon system in the approximation of dispersionless longitudinal optical phonons in polar semiconductors. Kinetic equations for electrons, LO-phonons, and second generation acoustic phonons are solved numerically for CdSe. The fusion lifetime of acoustic phonons is estimated for the processes of anharmonic acoustic-optical phonon coupling. The fusion processes are found to be critical for the occurrence of the acoustic phonon bottleneck.

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Generation and Detection of Large-k-Vector Phonons

Cited by 41 publications

References 25 publications

Manifestation of Hot Phonons in the Luminescence Spectra of Highly Photoexcited A^IIB^VI Crystals

Manifestation of Hot Phonons in the Luminescence Spectra of Highly Photoexcited A^IIB^VI Crystals

Stimulated decay of nonselectively pumped optical phonons in GaAs

Two‐stage relaxation of the electron‐phonon system in polar semiconductors

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Generation and Detection of Large-k-Vector Phonons

Cited by 41 publications

References 25 publications

Manifestation of Hot Phonons in the Luminescence Spectra of Highly Photoexcited AIIBVI Crystals

Manifestation of Hot Phonons in the Luminescence Spectra of Highly Photoexcited AIIBVI Crystals

Stimulated decay of nonselectively pumped optical phonons in GaAs

Two‐stage relaxation of the electron‐phonon system in polar semiconductors

Contact Info

Product

Resources

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Manifestation of Hot Phonons in the Luminescence Spectra of Highly Photoexcited A^IIB^VI Crystals

Manifestation of Hot Phonons in the Luminescence Spectra of Highly Photoexcited A^IIB^VI Crystals