Optimized design for a terahertz parametric oscillator based on degenerate four-wave mixing in silicon nitride

Amini, Tahereh; Jahangiri, Fazel

doi:10.1364/josab.396471

Cited by 5 publications

(2 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[11][12][13][14] Furthermore, the generation of THz picosecond pulses has rarely been considered in previous studies. 15,16 This manuscript proposed a Si-based WTPO system and numerically investigated the operating characteristics of a picosecond synchronously pumped scheme. The frequency range of the output THz-wave for the silicon membrane waveguide is determined by calculating the phase-matching conditions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and simulation of widely tunable picosecond synchronously pumped terahertz parametric oscillator based on silicon waveguide platform

Sun

Wen

Qin

et al. 2022

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A picosecond synchronously pumped terahertz optical parametric oscillator based on silicon membrane waveguide (Si-based WTPO) is proposed and numerically simulated. Through designing the structure parameters of the silicon membrane waveguide, a broadband terahertz frequency range is obtained by satisfying the phase matching condition. The parametric oscillation process and output characteristics of Si-based WTPO are numerically analyzed by solving the four-wave mixing coupled-wave equations, and the result has indicated that the parametric oscillation within the resonant cavity can apparently enhance the output terahertz wave power. Meanwhile, high bandwidth and efficiency output terahertz wave can be obtained, and too high pump power will lead to a reaction of reverse conversion. Finally, the threshold pump power is calculated. The Si-based WTPO system we proposed is expected to make some contributions to the study of compact and efficient terahertz wave sources.

show abstract

Section: Introductionmentioning

confidence: 99%

“…The theoretical and experimental studies on the FWM effect in silicon‐based waveguides have shown that this method is feasible to realize a compact and efficient THz source 11–14 . Furthermore, the generation of THz picosecond pulses has rarely been considered in previous studies 15,16 …”

Section: Introductionmentioning

confidence: 99%

Design and simulation of widely tunable picosecond synchronously pumped terahertz parametric oscillator based on silicon waveguide platform

Sun

Wen

Qin

et al. 2022

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

Regenerative terahertz wave parametric amplifier based on four-wave mixing in asynchronously pumped graphene oxide integrated TOPAS

Amini

Jahangiri

2021

Opt. Express

View full text Add to dashboard Cite

A widely tunable regenerative terahertz parametric amplifier is proposed based on degenerate four-wave mixing in an asynchronously pumped highly nonlinear medium. To enhance the Kerr nonlinearity, a hybrid structure of cyclic olefin co/polymer (COC/P) TOPAS integrated by a graphene oxide film is utilized as the gain medium and embedded into a cavity. A low-power terahertz seed wave is injected inside the cavity and sequentially pumped by four asynchronous coupled beams of identical powers. Our results reveal that the output power, the tuning frequency range and the power conversion efficiency of terahertz waves could be considerably improved in the proposed design. Terahertz waves with maximum peak power of 641 W, the accumulated conversion efficiency of 3.8% and amplification gain of 320.5 are obtained at a frequency of 9.61 THz, which could be tuned over a range of 1.17 − 19.736 THz.

show abstract

Tuning single-walled aligned carbon nanotubes for optimal terahertz pulse generation through optical rectification of ultrashort laser pulses

Hassani

Jahangiri

2021

Opt. Express

View full text Add to dashboard Cite

Terahertz radiation by optical rectification in single-walled highly aligned chiral carbon nanotubes (SWCNTs) irradiated by ultrashort laser pulses is comprehensively studied. We take into account the structural properties of SWCNTs, including the filling factor, alignment, and chirality, as well as the laser pulse parameters including the pulse duration and the wavelength. The second-order nonlinear susceptibility tensor and, consequently, polarization responsible for optical rectification in SWCNTs are derived based on symmetrical features.The effective dielectric constants of SWCNTs are also extracted using the effective medium approximation. Then, the propagation effects in terms of the group velocity dispersion and absorption at both pump and terahertz pulse frequency regions are investigated. By adjusting the laser and the structure effective parameters among those practically feasible, minimum velocity mismatch required for optimum optical rectification and coherent amplification at terahertz frequencies in SWCNTs are introduced. Comparing the electric field waveform and the spectrum of the generated terahertz pulses under various conditions reveals that SWCNTs with higher alignment and lower filling factor at chirality (6,4) irradiated by an ultrashort laser pulse with the wavelength of 1550 nm could provide the conditions for maximum terahertz radiation generation.

show abstract

Optimized design for a terahertz parametric oscillator based on degenerate four-wave mixing in silicon nitride

Cited by 5 publications

References 39 publications

Design and simulation of widely tunable picosecond synchronously pumped terahertz parametric oscillator based on silicon waveguide platform

Design and simulation of widely tunable picosecond synchronously pumped terahertz parametric oscillator based on silicon waveguide platform

Regenerative terahertz wave parametric amplifier based on four-wave mixing in asynchronously pumped graphene oxide integrated TOPAS

Tuning single-walled aligned carbon nanotubes for optimal terahertz pulse generation through optical rectification of ultrashort laser pulses

Contact Info

Product

Resources

About