Quantum-dot based ultrafast photoconductive antennae for efficient THz radiation

Andrei Gorodetsky, Natalia Bazieva, Edik U. Rafailov

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

Abstract

Here we overview our work on quantum dot based THz photoconductive antennae, capable of being pumped at very high optical intensities of higher than 1W optical mean power, i.e. about 50 times higher than the conventional LT-GaAs based antennae. Apart from high thermal tolerance, defect-free GaAs crystal layers in an InAs:GaAs quantum dot structure allow high carrier mobility and ultra-short photo carrier lifetimes simultaneously. Thus, they combine the advantages and lacking the disadvantages of GaAs and LT-GaAs, which are the most popular materials so far, and thus can be used for both CW and pulsed THz generation. By changing quantum dot size, composition, density of dots and number of quantum dot layers, the optoelectronic properties of the overall structure can be set over a reasonable range-compact semiconductor pump lasers that operate at wavelengths in the region of 1.0 μm to 1.3 μm can be used. InAs:GaAs quantum dot-based antennae samples show no saturation in pulsed THz generation for all average pump powers up to 1W focused into 30 μm spot. Generated THz power is super-linearly proportional to laser pump power. The generated THz spectrum depends on antenna design and can cover from 150 GHz up to 1.5 THz.

Original languageEnglish
Title of host publicationSynthesis and Photonics of Nanoscale Materials XIII
EditorsAndrei V. Kabashin, David B. Geohegan, Jan J. Dubowski
Place of PublicationBellingham, WA (US)
PublisherSPIE
Number of pages9
ISBN (Print)978-1-6284-1972-6
DOIs
Publication statusPublished - 9 Mar 2016
EventSynthesis and Photonics of Nanoscale Materials XIII - San Francisco, United States
Duration: 15 Feb 201617 Feb 2016

Publication series

NameSPIE Proceedings
PublisherSPIE
Volume9737
ISSN (Print)0277-786X
ISSN (Electronic)2410-9045

Conference

ConferenceSynthesis and Photonics of Nanoscale Materials XIII
CountryUnited States
CitySan Francisco
Period15/02/1617/02/16

Fingerprint

Gallium Arsenide
Quantum Dots
Semiconductor quantum dots
Antenna
antennas
quantum dots
Radiation
Antennas
radiation
Pump
Pumps
pumps
antenna design
Carrier lifetime
Lasers
Laser
Carrier mobility
Power Mean
carrier lifetime
carrier mobility

Bibliographical note

Andrei Gorodetsky; Natalia Bazieva and Edik U. Rafailov; "Quantum-dot based ultrafast photoconductive antennae for efficient THz radiation", Proc. SPIE 9737, Synthesis and Photonics of Nanoscale Materials XIII, 97370C (March 9, 2016).

Copyright 2016. Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited

DOI: http://dx.doi.org/10.1117/12.2222815

Funding: EPSRC Grant No EP/H015795/1 and FP7 IAPP TERA project No 285974

Keywords

  • photoconductive antenna
  • quantum dots
  • semiconductors
  • THz generation

Cite this

Gorodetsky, A., Bazieva, N., & Rafailov, E. U. (2016). Quantum-dot based ultrafast photoconductive antennae for efficient THz radiation. In A. V. Kabashin, D. B. Geohegan, & J. J. Dubowski (Eds.), Synthesis and Photonics of Nanoscale Materials XIII [97370C] (SPIE Proceedings; Vol. 9737). Bellingham, WA (US): SPIE. https://doi.org/10.1117/12.2222815
Gorodetsky, Andrei ; Bazieva, Natalia ; Rafailov, Edik U. / Quantum-dot based ultrafast photoconductive antennae for efficient THz radiation. Synthesis and Photonics of Nanoscale Materials XIII. editor / Andrei V. Kabashin ; David B. Geohegan ; Jan J. Dubowski. Bellingham, WA (US) : SPIE, 2016. (SPIE Proceedings).
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Gorodetsky, A, Bazieva, N & Rafailov, EU 2016, Quantum-dot based ultrafast photoconductive antennae for efficient THz radiation. in AV Kabashin, DB Geohegan & JJ Dubowski (eds), Synthesis and Photonics of Nanoscale Materials XIII., 97370C, SPIE Proceedings, vol. 9737, SPIE, Bellingham, WA (US), Synthesis and Photonics of Nanoscale Materials XIII, San Francisco, United States, 15/02/16. https://doi.org/10.1117/12.2222815

Quantum-dot based ultrafast photoconductive antennae for efficient THz radiation. / Gorodetsky, Andrei; Bazieva, Natalia; Rafailov, Edik U.

Synthesis and Photonics of Nanoscale Materials XIII. ed. / Andrei V. Kabashin; David B. Geohegan; Jan J. Dubowski. Bellingham, WA (US) : SPIE, 2016. 97370C (SPIE Proceedings; Vol. 9737).

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

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Gorodetsky A, Bazieva N, Rafailov EU. Quantum-dot based ultrafast photoconductive antennae for efficient THz radiation. In Kabashin AV, Geohegan DB, Dubowski JJ, editors, Synthesis and Photonics of Nanoscale Materials XIII. Bellingham, WA (US): SPIE. 2016. 97370C. (SPIE Proceedings). https://doi.org/10.1117/12.2222815