Next Article in Journal
Dispersion and Pressure Sensitivity of Carbon Nanofiber-Reinforced Polyurethane Cement
Next Article in Special Issue
Dual-Band Light Absorption Enhancement in Hyperbolic Rectangular Array
Previous Article in Journal
Development of Image Processing for Crack Detection on Concrete Structures through Terrestrial Laser Scanning Associated with the Octree Structure
Article Menu
Issue 12 (December) cover image

Export Article

Open AccessArticle

Waveguided Approach for Difference Frequency Generation of Broadly-Tunable Continuous-Wave Terahertz Radiation

1
INO, Istituto Nazionale di Ottica-CNR, Largo E. Fermi 6, I-50125 Firenze, Italy
2
LENS, European Laboratory for Nonlinear Spectroscopy, Via N. Carrara 1, Sesto, I-50019 Fiorentino, Italy
*
Author to whom correspondence should be addressed.
Appl. Sci. 2018, 8(12), 2374; https://doi.org/10.3390/app8122374
Received: 9 October 2018 / Revised: 19 November 2018 / Accepted: 20 November 2018 / Published: 24 November 2018
(This article belongs to the Special Issue Recent Advances in Plasmonics and Nanophotonics)
  |  
PDF [2344 KB, uploaded 24 November 2018]
  |  

Abstract

The 1–10 terahertz (THz) spectral window is emerging as a key region for plenty of applications, requiring not yet available continuous-wave room-temperature THz spectrometers with high spectral purity and ultra-broad tunability. In this regard, the spectral features of stabilized telecom sources can actually be transferred to the THz range by difference frequency generation, considering that the width of the accessible THz spectrum generally scales with the area involved in the nonlinear interaction. For this reason, in this paper we extensively discuss the role of Lithium Niobate (LN) channel-waveguides in the experimental accomplishment of a room-temperature continuous wave (CW) spectrometer, with μW-range power levels and a spectral coverage of up to 7.5 THz. To this purpose, and looking for further improvements, a thought characterization of specially-designed LN waveguides is presented, whilst discussing its nonlinear efficiency and its unprecedented capability to handle high optical power (107 W/cm2), on the basis of a three-wave-mixing theoretical model. View Full-Text
Keywords: waveguide; nonlinear optics; terahertz sources waveguide; nonlinear optics; terahertz sources
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

De Regis, M.; Consolino, L.; Bartalini, S.; De Natale, P. Waveguided Approach for Difference Frequency Generation of Broadly-Tunable Continuous-Wave Terahertz Radiation. Appl. Sci. 2018, 8, 2374.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Appl. Sci. EISSN 2076-3417 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top