Size‐Dependent Structures and Optical Absorption of Boron‐Hyperdoped Silicon Nanocrystals. Issue 5 (29th February 2016)

• Record Type: Journal Article
• Authors: Ni, Zhenyi; Pi, Xiaodong; Zhou, Shu; Nozaki, Tomohiro; Grandidier, Bruno; Yang, Deren
• Is Part Of: Advanced optical materials. Volume 4:Issue 5(2016:May)
• Page Start: 700
• Page End: 707
• Publication Date: 2016-02-29
• Subjects: boron hyperdoping -- localized surface plasmon resonance -- silicon nanocrystals -- size effects -- subbandgap optical absorption; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.201500706
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract : Hyperdoping silicon nanocrystals (Si NCs) is emerging as an effective means to obtain novel properties such as localized surface plasmon resonance (LSPR) from Si. Here it is shown that the physical properties and in particular the LSPR of boron (B)‐hyperdoped Si NCs significantly change as the NC size decreases from 6.8 to 2.4 nm. While the largest Si NCs undergo a stronger reduction of the average lattice spacing upon doping with respect to the smallest ones, they suffer much less from disorder and show LSPR over a wider range of B concentration. As a result, by taking advantage of the tunability of the NC size and doping level, the LSPR energy can be changed, making attractive the development of novel Si structures and devices based on B‐hyperdoped Si NCs. Abstract : Boron‐hyperdoped silicon nanocrystals (Si NCs) exhibit size‐dependent physical properties and in particular localized surface plasmon resonance (LSPR). The LSPR energy can be tuned with size for a given boron doping level. Significant free carrier scattering at the NC surface can totally damp the LSPR of extremely small boron‐hyperdoped Si NCs. Boron needs more effective actication to enhance the LSPR tunability.