Single nanoparticle detection using optical microcavities: from reactive to dissipative interaction

Date

Aug 11, 2017

Time

1:00 PM - 2:00 PM

Speaker

Prof. Yun-Feng Xiao

Affiliation

Peking University, Beijing 100871, P. R. China

Language

en

Main Topic

Materialien

Other Topics

Materialien, Physik

Host

Kristina Krummer

Description

Single nanoparticle detection is of critical importance in many applications. Optical microcavities featuring high-Q factors and small mode volumes have been widely investigated in sensing applications. In general, the microcavity sensing depends mainly on reactive (i.e., dispersive) interactions, resulting in a resonance wavelength shift or mode splitting, which essentially responds to the real part of the polarizability of the targets. In the first part of the presentation, I will talk about the experimental demonstration of single nanoparticle detection using either resonance mode broadening or microcavity Raman laser splitting. In the second part, a dissipative sensing method is demonstrated to detect single lossy nanoparticles. This dissipative sensing method holds great potentials in detecting nanoparticles of high absorption or ultralow polarizabilities, such as carbon nanotubes and metal nanoparticles, and in characterizing nanoparticle properties in combination with the reactive sensing method. [1] Bei-Bei Li, William R. Clements, Xiao-Chong Yu, Kebin Shi, Qihuang Gong, and Yun-Feng Xiao, PNAS 111, 14657 (2014). [2] Linbo Shao, Xue-Feng Jiang, Xiao-Chong Yu, Bei-Bei Li, William R. Clements, Frank Vollmer, Wei Wang, Yun-Feng Xiao, and Qihuang Gong, Adv. Mater. 25, 5616 (2013). [3] Xiao-Chong Yu, Bei-Bei Li, Pan Wang, Limin Tong, Xue-Feng Jiang, Yan Li, Qihuang Gong, and Yun-Feng Xiao, Adv. Mater. 26, 7462 (2014). [4] B.-Q. Shen, X.-C. Yu, Y. Zhi, L. Wang, D. Kim, Q. Gong, and Y.-F. Xiao, Phys. Rev. Applied 5, 024011 (2016). [5] Yanyan Zhi, Xiao-Chong Yu, Qihuang Gong, Lan Yang, Yun-Feng Xiao, Adv. Mater. 29, 1604920 (2017).

Links

• Seminars at the IFW

Last modified: Aug 11, 2017, 9:40:04 AM