논문 해외 국제전문학술지(SCI급) Various Shaped Semiconductor Microlens Arrays Fabricated by Selective Oxidation of AlGaAs
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2009
- 저자명 김건희
- 학술지명 IEEE PHOTONICS TECHNOLOGY LETTERS
- 발행처명 Institute of Electrical and Electronics Engineers
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 8
홈페이지논문 초록 (Abstract)
Semiconductor microlens arrays with circular, cylindrical, square, and ring-type bases were fabricated by using selective oxidation of chirped short-period superlattice of GaAs-AlGaAs. Confocal microscopy and atomic force microscopy were used to evaluate the surface morphology of the fabricated microlenses, which revealed that they have cross-sectional profiles close to spherical in shape and an root-mean-square surface roughness of less than 10 nm for the scanned area of 5 mu m x 5 mu m. The optical parameters of the microlenses, evaluated by measuring the focused spot pattern and focal length, revealed strong focusing function of the microlenses that were very close to the calculated values, indicating high structural and optical quality of the fabricated microlenses.