Electric-field-dependent electroreflectance spectra of visible-band-gap (InAlGa)P quantum-well structures

Journal Article · Mon Apr 04 04:00:00 EDT 1994 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.111767· OSTI ID:5045281

Fritz, I J; Blum, O; Schneider, Jr, R P; Howard, A J; Follstaedt, D M ^[1]

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1. Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

We present results from the first studies of electric-field effects on optical transitions in visible-band-gap InGaP/InAlGaP multiple-quantum-well (MQW) structures. These structures, grown at 775 [degree]C by metalorganic vapor phase epitaxy on (100) GaAs substrates misoriented 6[degree] towards P(111)[r angle][l angle]111[r angle]A, consist of nominally undoped MQWs surrounded by doped In[sub 0.49]Al[sub 0.51]P cladding layers to form [ital p]-[ital i]-[ital n] diodes. The Stark shifts of various allowed and forbidden quantum-well transitions were observed in bias-dependent electroreflectance spectra of In[sub 0.49]Ga[sub 0.51]P/In[sub 0.49](Al[sub 0.5]Ga[sub 0.5])[sub 0.51]P MQW samples with 10-nm-thick layers. We find the magnitude of these shifts to depend on the details of the Mg doping profile, confirming the importance of Mg diffusion and unintentional background doping in these materials. Our results show that (InAlGa)P materials are promising for visible-wavelength electro-optic modulator applications.

• DOE Contract Number: AC04-94AL85000
• OSTI ID: 5045281
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 64:14; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
ALUMINIUM COMPOUNDS
ALUMINIUM PHOSPHIDES
DOPED MATERIALS
ELECTRIC FIELDS
ENERGY GAP
EPITAXY
GALLIUM COMPOUNDS
GALLIUM PHOSPHIDES
INDIUM COMPOUNDS
INDIUM PHOSPHIDES
MATERIALS
OPTICAL PROPERTIES
PHOSPHIDES
PHOSPHORUS COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
STARK EFFECT
VAPOR PHASE EPITAXY