Physics of Internal Photoemission and Its Infrared Applications in the Low-Energy Limit

Table 1

Phonons of GaAs (80 K) determined by internal photoemission spectroscopy. is  meV. The numbers in parenthesis are uncertainties.

Features (meV)
Phonons	TA()	TA()	—	TA()	2 × TA()
Features (meV)
Phonons	LO()	LO()	3 × TO()
	TO()	LO()	LO()	TA()	TA()
This work (meV)	33.1 (0.2)	35.4 (0.2)	28.9 (0.2)	12.2 (0.8)	8.1 (0.5)
Waugh and Dolling	33.2 (0.3)	35.4 (0.8)	29.9 (0.6)	9.75 (0.06)	7.70 (0.06)
Blakemore					—
Giannozzi et al.
Steiger et al.

[38].
Extracted from multiple phonon features; see Table XI of [32].
[39].
[40].