Nonlinear Optical Materials in Fundamental Science and Practical Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanophotonics Materials and Devices".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 1280

Special Issue Editors

School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China
Interests: materials science; nonlinear optics; ultrafast photonics
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Guest Editor
College of Engineering, Southern University of Science and Technology, Shenzhen, China
Interests: fiber sensor; ultrafast photonics

Special Issue Information

Dear Colleagues,

The investigation of nonlinear optical materials can be traced back to the mid-20th century. As laser technology advanced, scientists began to observe strange changes in the optical characteristics of materials exposed to high-intensity laser irradiation. For instance, quartz crystals exhibited a nonlinear optical phenomenon called second harmonic generation for the first time when exposed to focused laser irradiation, which sparked widespread interest in nonlinear optical materials and effects. In the 1970s, additional nonlinear optical effects such as self-focusing, optical phase conjugation, and optical modulation were discovered in various materials. Due to the field's rapid development in recent decades, exploring novel nonlinear optical materials with high performance has become a central focus across a wide range of domains, from fundamental science to practical applications.

Considering these advancements, the current Special Issue of "Nanomaterials" welcomes submissions on the state of nonlinear optical material research. This Special Issue aims to present the most recent research findings in nonlinear optical materials, including new phenomena, novel devices, advanced materials, and innovative applications, etc., to enable academia and industry to better understand and apply this exciting field.

Potential topics of interest include, but are not limited to, the following:

  • Novel nonlinear optical materials and nonlinear optical effects;
  • New nonlinear optical materials for ultrafast, THz photonics and frequency conversion;
  • Nanocrystalline materials, 2D materials and topological materials;
  • Nonlinear dynamics and attosecond process;
  • Nonlinear optics material for machine learning, deep learning, and neural network.

Dr. Xiaohui Li
Dr. Penglai Guo
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nonlinear optics materials
  • nonlinear optics effects
  • nonlinear dynamics
  • artificial intelligence

Published Papers (2 papers)

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Research

9 pages, 3493 KiB  
Article
Study on Spectrum Shifting and Pulse Splitting of Mode-Locked Fiber Lasers Based on NPR Technology
by Zhenhua Hao, Yu Hu, Siyu Zhou, Jinhui Liu, Xiaohui Li, Yishan Wang and Cunxiao Gao
Nanomaterials 2024, 14(9), 739; https://doi.org/10.3390/nano14090739 - 23 Apr 2024
Viewed by 423
Abstract
We conducted a systematic investigation into the spectral and pulse characteristics of C and L-band Nonlinear Polarization Rotation (NPR) mode-locked fiber lasers effectively employing nonlinear polarization rotation technology. In our experimental setup, we achieved a stable mode-locked state at 1560.076 nm, exhibiting a [...] Read more.
We conducted a systematic investigation into the spectral and pulse characteristics of C and L-band Nonlinear Polarization Rotation (NPR) mode-locked fiber lasers effectively employing nonlinear polarization rotation technology. In our experimental setup, we achieved a stable mode-locked state at 1560.076 nm, exhibiting a 3 dB spectral bandwidth of 9.1 nm. As the pump power increased, we observed spectral shifts accompanied by shifts in the first Kelly sideband and the generation of new Kelly sidebands. In this paper, the phenomenon of spectral deviation is elucidated through the interplay of self-phase modulation, group velocity drift, and polarization-dependent isolator (PD-ISO) filter effect, with an analysis of the formation and deviation of Kelly sidebands. Notably, spectral shift persisted even when the pump power exceeded 200 mW. However, continuous pump power escalation led to soliton splitting, resulting in the formation of new soliton beams. Based on the simultaneous generation of spectral shift and pulse splitting, our study contributes to an enhanced understanding of soliton dynamics in ultrafast fiber lasers and lays a foundation for the application of high-repetition-frequency harmonic mode-locked lasers with tunable wavelengths. Full article
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11 pages, 11896 KiB  
Article
Optical Limiting Response of Porous Carbon Dispersions
by Bo Gao, Xuhui Zhao, Lihe Yan, Lijiao Yang, Yue Zhang, Tao Lin and Jinhai Si
Nanomaterials 2024, 14(6), 533; https://doi.org/10.3390/nano14060533 - 17 Mar 2024
Viewed by 661
Abstract
With the wide application of intense lasers, the protection of human eyes and detectors from laser damage is becoming more and more strict. In this paper, we study the nonlinear optical limiting (OL) properties of porous carbon with a super large specific surface [...] Read more.
With the wide application of intense lasers, the protection of human eyes and detectors from laser damage is becoming more and more strict. In this paper, we study the nonlinear optical limiting (OL) properties of porous carbon with a super large specific surface area (2.9 × 103 m2/g) using the nanosecond Z-scan technique. Compared to the traditional OL material C60, the porous carbon material shows an excellent broadband limiting effect, and the limiting thresholds correspond to 0.11 J/cm2 for 532 nm and 0.25 J/cm2 for 1064 nm pulses, respectively. The nonlinear scattering experiments showed that the OL behavior was mainly attributed to the nonlinear scattering effect, which is caused by the rapid growth and expansion of bubbles in the dispersion induced by laser irradiation, and the scattered light distribution is consistent with the results of Mie’s scattering. These results suggest that porous carbon materials are expected to be applied to the field of laser protection in the future to further protect the human eye and precision optical instruments. Full article
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