scholarly journals THz generation by optical rectification of intense near-infrared pulses in organic crystal BNA

2020 ◽  
Vol 28 (24) ◽  
pp. 36274
Author(s):  
F. Roeder ◽  
M. Shalaby ◽  
B. Beleites ◽  
F. Ronneberger ◽  
A. Gopal
Keyword(s):  
Near Infrared ◽  
Organic Crystal ◽  
Optical Rectification ◽  
Thz Generation

scholarly journals High Field Single- to Few-Cycle THz Generation with Lithium Niobate

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 183
Author(s):  
Xing Zhu ◽  
David R. Bacon ◽  
Julien Madéo ◽  
Keshav M. Dani
Keyword(s):  
Lithium Niobate ◽  
Condensed Matter ◽  
High Harmonic ◽  
Nonlinear Spectroscopy ◽  
Optical Rectification ◽  
Phase Matching ◽  
Nonlinear Phenomena ◽  
Generation Efficiency ◽  
Basic Principles ◽  
Thz Generation

The transient terahertz (THz) pulse with high peak field has become an important tool for matter manipulation, enabling many applications such as nonlinear spectroscopy, particle acceleration, and high harmonic generation. Among the widely used THz generation techniques, optical rectification in lithium niobate (LN) has emerged as a powerful method to achieve high fields at low THz frequencies, suitable to exploring novel nonlinear phenomena in condensed matter systems. In this review, we focus on introducing single- to few-cycle THz generation in LN, including the basic principles, techniques, latest developments, and current limitations. We will first discuss the phase matching requirements of LN, which leads to Cherenkov-like radiation, and the tilted pulse front (TPF) technique. Emphasis will be put on the TPF technique, which has been shown to improve THz generation efficiency, but still has many limitations. Different geometries used to produce continuous and discrete TPF will be systematically discussed. We summarize the advantages and limitations of current techniques and future trends.

scholarly journals Highly efficient THz generation by optical rectification of mid-IR pulses in DAST

APL Photonics ◽  
2021 ◽  
Vol 6 (4) ◽  
pp. 046105
Author(s):  
Claudia Gollner ◽  
Mostafa Shalaby ◽  
Corinne Brodeur ◽  
Ignas Astrauskas ◽  
Rokas Jutas ◽  
...  
Keyword(s):  
Optical Rectification ◽  
Thz Generation ◽  
Highly Efficient

scholarly journals Direct Observation of Terahertz Frequency Comb Generation in Difference-Frequency Quantum Cascade Lasers

2021 ◽  
Vol 11 (4) ◽  
pp. 1416
Author(s):  
Luigi Consolino ◽  
Malik Nafa ◽  
Michele De Regis ◽  
Francesco Cappelli ◽  
Saverio Bartalini ◽  
...  
Keyword(s):  
Near Infrared ◽  
Quantum Cascade Lasers ◽  
Molecular Spectroscopy ◽  
Frequency Comb ◽  
Frequency Standard ◽  
Difference Frequency ◽  
Heterodyne Detection ◽  
Optical Rectification ◽  
Total Output ◽  
Quantum Cascade

Terahertz quantum cascade laser sources based on intra-cavity difference frequency generation from mid-IR devices are an important asset for applications in rotational molecular spectroscopy and sensing, being the only electrically pumped device able to operate in the 0.6–6 THz range without the need of bulky and expensive liquid helium cooling. Here we present comb operation obtained by intra-cavity mixing of a distributed feedback laser at λ = 6.5 μm and a Fabry–Pérot device at around λ = 6.9 μm. The resulting ultra-broadband THz emission extends from 1.8 to 3.3 THz, with a total output power of 8 μW at 78 K. The THz emission has been characterized by multi-heterodyne detection with a primary frequency standard referenced THz comb, obtained by optical rectification of near infrared pulses. The down-converted beatnotes, simultaneously acquired, confirm an equally spaced THz emission down to 1 MHz accuracy. In the future, this setup can be used for Fourier transform based evaluation of the phase relation among the emitted THz modes, paving the way to room-temperature, compact, and field-deployable metrological grade THz frequency combs.

THz generation in organic crystal BNA at MHz repetition rates

2021 ◽  
Author(s):  
S. Mansourzadeh ◽  
T. Vogel ◽  
M. Shalaby ◽  
F. Wulf ◽  
C. J. Saraceno
Keyword(s):  
Organic Crystal ◽  
Thz Generation

Compact and cost-effective scheme for THz generation via optical rectification in GaP and GaAs using novel fs laser oscillators

2011 ◽  
Vol 103 (1) ◽  
pp. 45-50 ◽  
Author(s):  
J.-P. Negel ◽  
R. Hegenbarth ◽  
A. Steinmann ◽  
B. Metzger ◽  
F. Hoos ◽  
...  
Keyword(s):  
Cost Effective ◽  
Optical Rectification ◽  
Thz Generation ◽  
Effective Scheme ◽  
Laser Oscillators ◽  
Fs Laser
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