Title :
Two-photon absorption in InP substrates in the 1.55 μm range
Author :
Vignaud, D. ; Lampin, J.F. ; Mollot, F.
Author_Institution :
Institut d´´Electronique, CNRS, Villeneuve d´´Ascq, France
fDate :
31 May-4 June 2004
Abstract :
The nonlinear optical absorption has been studied in three different InP substrates (semi-insulating Fe-doped, n-type S-doped and p-type Zn-doped) by subpicosecond pump-probe differential transmission experiments at 1.6 μm. A strong negative differential transmission peak is observed at zero delay, induced by an autocorrelation effect: it is related to two-photon absorption, but not to the occurrence of transitions involving any midgap level (noticeably the Fe-related one). The experimental two-photon absorption coefficient β for InP stands in the range between 24 and 33 cm/GW.
Keywords :
III-V semiconductors; absorption coefficients; indium compounds; infrared spectra; iron; light transmission; nonlinear optics; optical pumping; substrates; sulphur; time resolved spectra; two-photon processes; zinc; 1.55 mum; 1.6 mum; InP:Fe; InP:S; InP:Zn; autocorrelation effect; midgap level; n-type samples; nonlinear optical absorption; p-type sample; semi-insulating sample; subpicosecond pump-probe differential transmission experiments; substrates; two-photon absorption coefficient; Absorption; Doping; Fiber nonlinear optics; Indium phosphide; Nonlinear optics; Optical materials; Optical pumping; Optical scattering; Shape measurement; Substrates;
Conference_Titel :
Indium Phosphide and Related Materials, 2004. 16th IPRM. 2004 International Conference on
Print_ISBN :
0-7803-8595-0
DOI :
10.1109/ICIPRM.2004.1442629
