Resonant-enhanced dipolar interaction between THz-photons and confined acoustic phonons in nanostructures

Tzu Ming Liu, Ja Yu Lu, Chung Chiu Kuo, Meng Ju Yang, Chih Wei Lai, Pi Tai Chou, Ming Hao Chang, Hsiang Lin Liu, Yu Tai Li, Ci Ling Pan, Shih Hung Lin, Chieh Hsiung Kuan, Chi Kuang Sun

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

By using a frequency-controlled narrow band THz source, a Fourier Transform Infrared (FTIR) spectroscopy system, and a frequency-controlled terahertz (THz) emitter, for the first time, we studied the THz photon absorption related to the THz confined acoustic vibrations in semiconductor nanocrystals. Through a specific charge separation in the CdSe/CdTe type-II nanocrystals and a piezoelectric coupling in the wurtzite CdSe nanocrystals, the THz photons can be resonantly coupled with (l=1) dipolar modes and the (l=0) breathing modes, respectively. Our results provide new mechanisms for low dimensional systems to convert a THz photon into a phonon of the same frequency..

Original languageEnglish
Title of host publicationUltrafast Phenomena in Semiconductors and Nanostructure Materials XII
DOIs
Publication statusPublished - 2008 Apr 21
EventUltrafast Phenomena in Semiconductors and Nanostructure Materials XII - San Jose, CA, United States
Duration: 2008 Jan 202008 Jan 23

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6892
ISSN (Print)0277-786X

Conference

ConferenceUltrafast Phenomena in Semiconductors and Nanostructure Materials XII
CountryUnited States
CitySan Jose, CA
Period08/1/2008/1/23

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Keywords

  • Confined acoustic phonons
  • Piezoelectric nanocrystals
  • Terahertz
  • Type-II nanocrystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Liu, T. M., Lu, J. Y., Kuo, C. C., Yang, M. J., Lai, C. W., Chou, P. T., Chang, M. H., Liu, H. L., Li, Y. T., Pan, C. L., Lin, S. H., Kuan, C. H., & Sun, C. K. (2008). Resonant-enhanced dipolar interaction between THz-photons and confined acoustic phonons in nanostructures. In Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII [68921C] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6892). https://doi.org/10.1117/12.760547