논문 해외 국제전문학술지(SCI급) Generation of wavelength-tunable optical vortices using an off-axis spiral phase mirror
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2021-09
- 저자명 김건희
- 학술지명 OPTICS LETTERS
- 발행처명 OPTICAL SOC AMER
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 14
홈페이지논문 초록 (Abstract)
Wavelength-tunable optical vortices with a topological charge equal to l = 1 of orbital angular momentum (OAM) were experimentally realized using a single off-axis spiral phase mirror (OSPM) with lasers of various visible-light wavelengths. Using an OSPM designed for 561 nm and an incidence angle of 45 degrees, circular doughnut-shaped l=1 optical vortices were obtained at 561, 473, and 660 nm by rotating the OSPM to modify the laser incidence angle. Wavelength-tunable l=1 optical vortices were obtained at the respective incidence angles of 45 degrees, 53.4 degrees, and 33.7 degrees, because the effective geometrical thickness of the OSPM, which determines the order of OAM, was identical at each wavelength. This flexible OSPM which operates over a wide wavelength range will provide continuously wavelength-tunable optical vortices for applications in the fields of advanced optics and photonics in which optical vortices with wide wavelength tenability are in demand. (C) 2021 Optical Society of America