Abstract
We investigate the second-order nonlinear optical (NLO) properties of tetragonal chalcopyrite-structure CuInSe2 thin films using optical second-harmonic generation at a fundamental wavelength of 790 nm. An approximate doubling of the second-order optical nonlinearity of the CuInSe2 thin films is achieved through changing the substrate from GaAs(001) to In0.29Ga0.71As(001), thereby reducing the lattice mismatch from 2.2% to 0.2%. This observation suggests that minimizing the lattice mismatch is a key requirement for the growth of high-quality NLO active chalcopyrite structure thin films and is in contrast to some other NLO active thin-film systems.
Original language | English |
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Pages (from-to) | 1294-1298 |
Number of pages | 5 |
Journal | IEEE Journal of Quantum Electronics |
Volume | 33 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1997 Aug |
Externally published | Yes |
Keywords
- Birefringence
- Nonlinear optics
- Phase matching
- Semiconductor defects
- Semiconductor materials
- Semiconductor waveguides
- Thin films
- X-ray measurements
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering