Polarization transformation of three light beams in sum-frequency generation in isotropic chiral medium in case of high conversion efficiency

We propose a scheme of terahertz (THz) indirect detection via plasmonic-antenna enhanced sum frequency generation process, where the THz wave is converted to optical wave that is detected by photodetector. The gold antenna built in the structure can improve the conversion efficiency by enhancing both the optical wave and THz wave. The numerical simulations show that the field enhancement is influenced by the geometry of the antenna, so the conversion efficiency can be improved highly by optimizing the antenna. Compared with commercial detectors, our detection system has a much lower noise equivalent power (NEP) of 15.4[Formula: see text]pW/[Formula: see text] at 5[Formula: see text]THz.

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Influence of Light Polarization States on Sum-Frequency Generation in a Chiral Medium with a Two-Coupled-Oscillator Model

Chinese Physics Letters ◽

10.1088/0256-307x/19/6/315 ◽

2002 ◽

Vol 19 (6) ◽

pp. 791-794 ◽

Cited By ~ 5

Author(s):

Zheng Yang-Dong ◽

Li Jun-Qing ◽

Li Chun-Fei

Keyword(s):

Light Polarization ◽

Sum Frequency Generation ◽

Chiral Medium ◽

Oscillator Model ◽

Coupled Oscillator ◽

Sum Frequency ◽

Polarization States ◽

Frequency Generation ◽

Coupled Oscillator Model

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Cavity-enhanced sum-frequency generation of blue light with near-unity conversion efficiency

Optics Express ◽

10.1364/oe.385826 ◽

2020 ◽

Vol 28 (3) ◽

pp. 3975 ◽

Cited By ~ 1

Author(s):

Hugo Kerdoncuff ◽

Jesper B. Christensen ◽

Túlio B. Brasil ◽

Valeriy A. Novikov ◽

Eugene S. Polzik ◽

...

Keyword(s):

Blue Light ◽

Conversion Efficiency ◽

Sum Frequency Generation ◽

Sum Frequency ◽

Frequency Generation

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Direct visualization of phase-matched efficient second harmonic and broadband sum frequency generation in hybrid plasmonic nanostructures

Light Science & Applications ◽

10.1038/s41377-020-00414-4 ◽

2020 ◽

Vol 9 (1) ◽

Author(s):

Zhe Li ◽

Brian Corbett ◽

Agnieszka Gocalinska ◽

Emanuele Pelucchi ◽

Wen Chen ◽

...

Keyword(s):

Conversion Efficiency ◽

Second Harmonic ◽

Effective Means ◽

Sum Frequency Generation ◽

Mode Analysis ◽

Plasmonic Nanostructures ◽

Integrated Photonics ◽

Direct Visualization ◽

Sum Frequency ◽

Frequency Generation

Abstract Second harmonic generation and sum frequency generation (SHG and SFG) provide effective means to realize coherent light at desired frequencies when lasing is not easily achievable. They have found applications from sensing to quantum optics and are of particular interest for integrated photonics at communication wavelengths. Decreasing the footprints of nonlinear components while maintaining their high up-conversion efficiency remains a challenge in the miniaturization of integrated photonics. Here we explore lithographically defined AlGaInP nano(micro)structures/Al2O3/Ag as a versatile platform to achieve efficient SHG/SFG in both waveguide and resonant cavity configurations in both narrow- and broadband infrared (IR) wavelength regimes (1300–1600 nm). The effective excitation of highly confined hybrid plasmonic modes at fundamental wavelengths allows efficient SHG/SFG to be achieved in a waveguide of a cross-section of 113 nm × 250 nm, with a mode area on the deep subwavelength scale (λ2/135) at fundamental wavelengths. Remarkably, we demonstrate direct visualization of SHG/SFG phase-matching evolution in the waveguides. This together with mode analysis highlights the origin of the improved SHG/SFG efficiency. We also demonstrate strongly enhanced SFG with a broadband IR source by exploiting multiple coherent SFG processes on 1 µm diameter AlGaInP disks/Al2O3/Ag with a conversion efficiency of 14.8% MW−1 which is five times the SHG value using the narrowband IR source. In both configurations, the hybrid plasmonic structures exhibit >1000 enhancement in the nonlinear conversion efficiency compared to their photonic counterparts. Our results manifest the potential of developing such nanoscale hybrid plasmonic devices for state-of-the-art on-chip nonlinear optics applications.

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