Türkçe

Two photon absorption quantum mechanism breaks through the resolution and efficiency limits of optical nanoprinting

568
2025-03-06 14:05:46
Çeviriyi gör

Recently, a research team from the School of Physics and Optoelectronic Engineering at Jinan University has elucidated for the first time the time-dependent quantum mechanism of two-photon absorption and proposed a two-photon absorption (fpTPA) optical nanoprinting technology based on few photon irradiation, successfully breaking through the bottleneck of traditional two-photon printing technology and achieving a perfect combination of high resolution and high efficiency.

Two photon absorption (TPA) is a nonlinear optical phenomenon widely used in three-dimensional fluorescence imaging and nanostructure processing. Traditional TPA technology uses high-intensity focused laser beams to excite fluorescent molecules for three-dimensional fluorescence imaging, or induces local chemical cross-linking reactions for three-dimensional nanoprocessing. However, high-intensity focused laser beams not only cause unnecessary high-order nonlinear optical effects, leading to problems such as phototoxicity, photobleaching, and micro explosions, but also limit their resolution and efficiency improvement.

Based on the existing research paradigm of two-photon effects based on wave optics theory, the research team started from the basic principles of quantum theory and constructed a quantum image of the two-photon absorption process using optical quantum properties such as wave particle duality, superposition state, uncertainty principle, and random probability statistics. They established a spatiotemporal quantum model of two-photon absorption under few photon irradiation and elucidated the time-dependent quantum mechanism of two-photon absorption. The simulation results show that under highly focused few photon femtosecond laser pulse irradiation, the probability of two-photon absorption exhibits a completely different distribution state from the traditional Gaussian distribution. Under ultra-low optical flow density, the probability of two-photon absorption can be compressed to the nanometer scale, proving the feasibility of using the quantum mechanism of two-photon absorption to break through the diffraction limit of traditional wave optics theory.


Schematic diagram of time-dependent quantum mechanism of two-photon absorption


The research team utilized digital optical projection nanolithography (TPDOPL) technology, combined with low photon irradiation technology, to achieve a minimum feature size of 26 nanometers by precisely controlling photon flux and pulse accumulation times. This size is only one twentieth of the wavelength, far below the resolution limit of traditional optical exposure techniques. Compared with traditional point by point laser direct writing technology, TPDOPL technology has increased throughput by 5 orders of magnitude and can achieve large-area nanostructure manufacturing in a short period of time. In addition, the research team also proposed an in-situ multiple exposure technique (iDME), which can achieve high-density pattern manufacturing without violating the optical diffraction limit by loading multiple patterns on the DMD and alternately exposing them. For example, through two alternating exposures, the research team successfully manufactured a dense line array with a period of 210 nanometers (equivalent to 0.41 times the wavelength), which is far below the limit that traditional optical exposure techniques can achieve.


Schematic diagram and simulation and experimental processing results of two-photon digital optical projection lithography system


This research work re examines the two-photon absorption effect from the perspective of fundamental photon properties, providing new ideas for ultra weak light nonlinear optics and enormous potential for the development of new principle based super diffraction optical technology and its cutting-edge applications in related fields. In the field of microelectronics, this technology can be used for the preparation of highly integrated chips; In the field of optics, it can be used for the manufacturing of high-performance optical waveguides and micro ring resonators; In the field of biomedical research, this technology can produce microfluidic chips for cell culture and virus detection, providing new tools for biomedical research. The research team pointed out that the success of two-photon absorption (fpTPA) technology under low photon irradiation has brought new hope to the fields of nanomanufacturing and nanoimaging. Through further optimization, this technology is expected to be used for nanofabrication below 10 nanometers and even single-molecule imaging.

This research has received support from national key research and development programs, the "Guangdong Special Support Program" for leading talents in scientific and technological innovation, national natural science foundation projects, Guangzhou Key Field Research and Development Program, Guangdong Provincial Natural Science Foundation, and other projects.

Paper information:
Zi-Xin Liang, Yuan-Yuan Zhao, Jing-Tao Chen, Xian-Zi Dong, Feng Jin, Mei-Ling Zheng, Xuan-Ming Duan. Two-photon absorption under few-photon irradiation for optical nanoprinting. Nature Communications 16, 2086 (2025). 

Source: opticsky

İlgili öneriler
  • A major investment! Lumentum completes acquisition of research and development site in Carswell, UK

    Lumentum, a leading designer and manufacturer of innovative optical and photonic products, has announced that it has completed the acquisition of a site in Caswell, UK.Lumentum revealed that it has made significant investments in the site over the past two years and is currently undergoing development upgrades for its state-of-the-art cleanrooms and laboratories to continue to support the developm...

    2023-09-13
    Çeviriyi gör
  • The efficiency of crystalline silicon solar cells has exceeded 27% for the first time, and Longi's research results have been published in Nature

    Recently, Longi Green Energy Technology Co., Ltd. (hereinafter referred to as "Longi"), as the first unit, published a research paper titled "Silicon heterojunction back contact solar cells by laser patterning" online in the journal Nature, reporting for the first time the research results of breaking through 27% of the photoelectric conversion efficiency of crystalline silicon cells through full ...

    2024-10-18
    Çeviriyi gör
  • Germany has developed a fast, accurate, and wear-resistant laser drilling CFRP process

    Recently, scientists from the Hanover Laser Center (LZH) in Germany announced the successful development of an automated laser drilling process that can promote the processing of carbon fiber reinforced plastics (CFRP). They stated that this is particularly valuable in applications such as lightweight structures and sound insulation.Composite materials such as carbon fiber reinforced plastics (CFR...

    2024-03-06
    Çeviriyi gör
  • New method doubles and accelerates thermal tuning of optical chips, supporting two current and voltage regulation methods

    Silicon based quantum chip technology is one of the hot research directions in the field of integrated photonics. Thanks to compatibility with CMOS technology and silicon material characteristics, silicon-based integrated optical chips and devices have many advantages such as low cost, small size, low power consumption, and high integration, providing an ideal platform for large-scale optical comp...

    2024-04-02
    Çeviriyi gör
  • High precision laser linkage platform to help precision processing

    With the trend of industrial intelligence and precision processing, the demand for laser precision processing in precision 3C industry, machinery and equipment, new energy vehicles and other industries has developed rapidly, making the application of laser processing technology in the industrial field more comprehensive promotion.Due to the inherent nonlinear characteristics between optics and sca...

    2023-09-11
    Çeviriyi gör