로고

  • 처음으로
  • 사이트맵
  • 문의하기

  • >
  • 대학원
  • >
  • 연구성과

Tuning 2D Light Upconversion Emission by Modulating Phonon Relaxation
작성자 SPI lab 작성일 2017-09-05 조회수 60
.

  • The photonic upconversion in rare earth atoms is widely used to convert “invisible” near infrared photons to “visible” photons with continuous wave light. Using a patterned substrate, the upconversion become a type of process for creating new information incorporating security codes. The amount of information in the cipher increases in proportion to the number of emission colors as well as the pattern structure. Subsequently, changing the chemical composition of upconversion phosphors on 2D substrates is required to manufacture information-rich upconversion crytography. In this study, we exploited temperature-controlled thermal reaction on upconversion films deposited on a quartz substrate to prepare security information codes. Multiple color emission was generated from upconversion films as the result of inserting high-frequency molecular oscillators into the film structures. Fourier-transform infrared (FT-IR) and time-resolved study corroborated the mechanism of spectral variation of upconversion films. 

     

    링크 : http://onlinelibrary.wiley.com/doi/10.1002/asia.201700782/full 



    첨부파일

     레이저실험실_사진.jpg