Emission studies on ZnO-inverse photonic crystals derived from self-assembly

Pramana

K Dasgupta¹  Alok K Ray¹  Sunita Kedia²  Sucharita Sinha¹  R Vijaya1 2² 

[1] Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India$$

关键词: Photonic crystals;    inverse photonic crystals;    sol–gel;    photoluminescence.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Photonic crystals fabricated from the colloidal spheres of polymethyl methacrylate (PMMA) using the inward-growing self-assembly technique were subse-quently in-filled with zinc oxide (ZnO) prepared by the sol–gel process. The polymer template was removed by heat treatment and chemical method to get ZnO-inverse photonic crystal. The structural quality of the inverse photonic crystal obtained by the chemical method was found to be superior to that obtained by heat treatment. The ZnO-inverse photonic crystal obtained by the chemical method was further treated at an elevated temperature to ensure the crystalline nature of ZnO. Laser-induced emission tudies on ZnO-inverse photonic crystals were carried out at an excitation wavelength of 325 nm. The emission spectra showing UV and visible bands at collection angle of 45° from the direction of excitation helped to establish the role of crystalline ZnO.

【 授权许可】

Unknown