Hot phonon dynamics

Kočevar, P.

doi:10.1016/0378-4363(85)90336-5

Cited by 74 publications

(40 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The term "hot phonons" stands for non-equilibrium LO phonons [2]. The estimated LO phonon occupancy exceeds many times the equilibrium one when the hot-electron temperature is high enough.…”

Section: Ns)mentioning

confidence: 99%

See 1 more Smart Citation

Microwave noise technique for measurement of hot-electron energy relaxation time and hot-phonon lifetime

Šermukšnis¹

2007

Lithuanian J. Phys.

View full text Add to dashboard Cite

Gated modulation-type radiometric technique for microwave noise measurement is upgraded for convenient investigation of hot-electron energy relaxation and hot-phonon dynamics in a channel with a high-density electron gas. The technique is applied to a GaN-based structure held at 80 and 293 K channel temperature. The results are discussed in terms of hot-phonon effect on hot-electron energy relaxation. The hot-phonon lifetime, estimated from the noise analysis, is compared with the values obtained by more traditional techniques.

show abstract

Section: Ns)mentioning

confidence: 99%

“…The accumulation causes additional scattering for the drifting electrons; the effect depends on the rate of disintegration of the nonequilibrium phonons into acoustic and other vibration modes [1]. The non-equilibrium LO phonons are called hot phonons [2]; the associated effects are often treated in terms of hot-phonon lifetime.…”

Section: Introductionmentioning

confidence: 99%

Microwave noise technique for measurement of hot-electron energy relaxation time and hot-phonon lifetime

Šermukšnis¹

2007

Lithuanian J. Phys.

View full text Add to dashboard Cite

show abstract

“…In our calculation, the hot phonon "bottleneck" [1,3,17] effect is ignored. This is equivalent to setting the lifetimes of the emitted LO-phonons to zero.…”

mentioning

confidence: 99%

Energy relaxation of an excited electron gas in quantum wires: Many-body electron-LO-phonon coupling

Zheng

Sarma

1996

Phys. Rev. B

View full text Add to dashboard Cite

We theoretically study energy relaxation via LO-phonon emission in an excited one-dimensional electron gas confined in a GaAs quantum wire structure. We find that the inclusion of phonon renormalization effects in the theory extends the LO-phonon dominated loss regime down to substantially lower temperatures. We show that a simple plasmon-pole approximation works well for this problem, and discuss implications of our results for low temperature electron heating experiments in quantum wires.

show abstract

“…The term "hot phonons" stands for the non-equilibrium longitudinal optical (LO) phonons emitted by hot electrons [5]. Accumulation of hot phonons introduces additional friction for the drifting electrons, modifies electron energy dissipation, enhances hot-electron temperature, and thus has an effect on performance of highspeed transistors [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…This difference is caused, in part, by hot phonons: the hot-phonon effects are stronger in nitrides, as compared with arsenides [6]. The hot-phonon effects are often treated in terms of hot-phonon lifetime [5,11,12]. The most direct technique for measuring the lifetime is pump-probe Raman scattering [13].…”

Section: Introductionmentioning

confidence: 99%

Fluctuation technique for investigation of ultrafast processes

Matulionis¹

2007

Lithuanian J. Phys.

View full text Add to dashboard Cite

Microwave fluctuations contain information on hot-electron energy relaxation, intervalley transfer, real-space transfer, and other ultrafast electronic processes in semiconductors and semiconductor structures. Based on this, the novel fluctuation technique was developed for investigation of ultrafast hot-phonon effects in two-dimensional (2D) and three-dimensional (3D) channels of importance for high-speed electronics. The hot-phonon lifetime (deduced from the hot-electron fluctuations) is in good agreement with the a posteriori reported data obtained through femtosecond-laser pump-probe experiments. Moreover, the fluctuation technique demonstrates the unique experimental possibility to study the lifetime as a function of the electron temperature in a voltage-biased 2D channel, while neither Raman photon scattering nor phonon-assisted inter-sub-band absorption has provided data of this sort as yet.

show abstract

Hot phonon dynamics

Cited by 74 publications

References 15 publications

Microwave noise technique for measurement of hot-electron energy relaxation time and hot-phonon lifetime

Microwave noise technique for measurement of hot-electron energy relaxation time and hot-phonon lifetime

Energy relaxation of an excited electron gas in quantum wires: Many-body electron-LO-phonon coupling

Fluctuation technique for investigation of ultrafast processes

Contact Info

Product

Resources

About