Enhanced Broadband Electromagnetic Absorption in Silicon Film with Photonic Crystal Surface and Random Gold Grooves Reflector

被引：22

作者：

Chen, Zhi-Hui ^{[1
,2
]}

Qiao, Na ^{[1
]}

Yang, Yibiao ^{[1
]}

Ye, Han ^{[2
]}

Liu, Shaoding ^{[1
]}

Wang, Wenjie ^{[1
]}

Wang, Yuncai ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Key Lab Adv Transducers & Intelligent Control Sys, Minist Educ & Shanxi Prov, Coll Phys & Optoelect, Taiyuan 030024, Peoples R China

[2] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China

来源：

SCIENTIFIC REPORTS | 2015年 / 5卷

基金：

中国国家自然科学基金;

关键词：

SOLAR-CELLS; QUANTUM DOTS; NANOSTRUCTURES; EMISSION;

D O I：

10.1038/srep12794

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We show a hybrid structure consisting of Si film with photonic crystal surface and random triangular gold grooves reflector at the bottom, which is capable of realizing efficient, broad-band, wide-angle optical absorption. It is numerically demonstrated that the enhanced absorption in a broad wavelength range (0.3-9.9 mu m) due to the scattering effect of both sides of the structure and the created resonance modes. Larger thickness and period are favored to enhance the absorption in broader wavelength range. Substantial electric field concentrates in the grooves of surface photonic crystal and in the Si film. Our structure is versatile for solar cells, broadband photodetection and stealth coating.

引用

页数：8

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