YANG Jianfeng,JIA Zhenhong,Lü Xiaoyi,HUANG Xiaohui,WANG Jiajia.Digital image biological detection technology based on the porous silicon periodic crystals film[J].Optoelectronics Letters,2021,17(9):552-557 Digital image biological detection technology based on the porous silicon periodic crystals film Author Name Affiliation YANG Jianfeng  School of Physical Science and Technology, Xinjiang University, Urumqi 830046, China  JIA Zhenhong  School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China  Lü Xiaoyi  School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China  HUANG Xiaohui  School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China  WANG Jiajia  School of Information Science and Engineering, Xinjiang University, Urumqi 830046, China  Abstract:       In order to solve this problem, a new biological detection method is proposed, which makes use of the characteristics of optical transmission at the edge of the spectral band gap and sensitive to refractive index variation. When the probe light with wavelength at the edge of the Bragg band gap of porous silicon is incident on the surface of porous silicon, the change of refractive index caused by deoxyribonucleic acid (DNA) reaction in porous silicon will affect the detection light intensity transmitted from the porous silicon sensor. By analyzing the change of the average gray value of the transmitted light image, the concentration of the DNA can be obtained. Hits: 577 Download times: 70 View Full Text    Download reader