活動一覽
昔日活動
所有
傑出學人講座
合辦講座
研討會
薈萃高研院
工作坊 / 論壇
學術會議
研究專題
其他
訂閱電子新聞
IAS PROGRAM ON WAVE FUNCTIONAL MATERIALS
Fabrication of Random Metal Nanostructures Based on Macroporous Silicon
Prof Xianyu Ao, Professor of the Academy of Advanced Optoelectronics, South China Normal University
日期 : 2015年 8月 26日 (星期三)
時間 : 下午3時 - 4時
地點 : 香港科技大學 李兆基校園 盧家驄薈萃樓4樓 高研院4042室
詳情

Abstract

The speaker is going to discuss his and his research group’s recent work related to macroporous silicon.

Macroporous silicon is produced by electrochemical etching of silicon, with pore diameters in the range of sub-micrometers up to several micrometers. Moreover, pores having large diameter variations on the length scale of the interpore distance can also be achieved, allowing the fabrication of complex three-dimensional structures like photonic crystals.

Macroporous silicon itself can be used as semiconductors (such as silicon solar cells). Besides, it can also be used as templates. By depositing a thin iron layer on arrays of cones which are replicated from a macroporous silicon template, a kind of absorber for visible and NIR is realized. The replicated conic structure itself is of several microns and ineffective in antireflection, but the subsequent deposition of iron on top generates nanometer-size columnar structures, and thus broadband absorption enhancement is achieved. Random plasmonic nanostructures can be obtained in a similar way, with intrinsic electromagnetic hot spots for field enhancement applications.

 

About the speaker

Prof Xianyu Ao received his PhD in Optical Engineering from Zhejiang University in 2006. Then he worked as a Visiting Scholar at the Hong Kong University of Science and Technology and as a Postdoctoral Fellow at University of North Carolina at Charlotte in US and at Max Planck Institute of Microstructure Physics in Germany. In 2012, he joined the South China Normal University and is currently a Professor of the Academy of Advanced Optoelectronics.

The seminar is free and open to all. Seating is on a first-come, first-served basis.

HKUST Jockey Club Institute for Advanced Study
Enquiries ias@ust.hk / 2358 5912
http://ias.ust.hk