In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 55, No. 10 ( 2016-10-01), p. 102701-
Abstract:
We report the intensity and spectral changes in a multi-mode terahertz quantum cascade laser induced by injecting λ = 800 nm optical pulses through a cavity facet. We find that photogenerated carriers, via modulation of the intersubband gain, increase the threshold current by up to 0.2 A and cause spectral changes such that the individual peaks of the multi-lateral-mode spectra are varied in amplitude with different ratios. It is found that the indirect recombination of electron–hole pairs and thermal relaxation on timescales of ∼700 ns and ∼10 µs, respectively, are involved in the recovery kinetics.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.7567/JJAP.55.102701
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2016
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
