Terahertz photonics

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Introduction to the Special Issue on "Photoconductive Emission and Detection of Terahertz Radiation"

JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES 33:4 (2012) 391-392
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Pump-Probe Spectroscopy at Terahertz Frequencies

Chapter in Terahertz Spectroscopy and Imaging, Springer Nature 171 (2012) 251-271

Authors:

Michael B Johnston, James Lloyd-Hughes
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III-V compound semiconductor nanowires for optoelectronic devices

Optics InfoBase Conference Papers (2011) 1021-1022

Authors:

Q Gao, HH Tan, HE Jackson, LM Smith, JM Yarrison-Rice, J Zou, M Johnston, C Jagadish

Abstract:

We review various III-V compound semiconductor nanowires grown by metalorganic chemical vapor deposition. Transmission and scanning electron microscopy, micro-photoluminescence and micro-Raman spectroscopy have been used to understand the crystal structure, light emission and band structure. © 2011 AOS.

Ultrafast charge separation at a single-walled carbon nanotube - Polymer interface

Materials Research Society Symposium Proceedings 1286 (2011) 85-90

Authors:

SD Stranks, C Weisspfennig, P Parkinson, MB Johnston, LM Herz, RJ Nicholas

Abstract:

We report the observation of an ultrafast (∼ 430 fs) charge transfer process at the interface between a single-walled carbon nanotube (SWNT) wrapped by a semi-conducting polymer, poly(3-hexylthiophene) (P3HT), creating free polarons on both materials. The addition of excess P3HT as a surrounding network allows these free polarons to be long-lived at room temperature. Our results suggest that SWNT-P3HT blends incorporating only 1% fractions of SWNTs can achieve a charge separation efficiency comparable to a conventional 60:40 P3HT-fullerene blend, provided small-diameter tubes are embedded in an excess P3HT matrix. © 2011 Materials Research Society.
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Growth and characterization of III-V compound semiconductor nanowires

16th Opto-Electronics and Communications Conference, OECC 2011 (2011) 366-367

Authors:

Q Gao, HH Tan, HE Jackson, LM Smith, JM Yarrison-Rice, J Zou, M Johnston, C Jagadish

Abstract:

We review various III-V compound semiconductor nanowires grown by metalorganic chemical vapor deposition. Transmission and scanning electron microscopy, micro-photolumine-scence and micro-Raman spectroscopy have been used to understand the crystal structure, light emission and band structure. © 2011 National Sun Yat-Sen Univ.