Professor Ma Bin and colleagues from the Precision Optical Engineering Research Institute at Tongji University conducted near-earth space irradiation simulation experiments to investigate the mechanisms by which three space environmental factors, including proton irradiation, atomic oxygen irradiation, and space debris impact, individually and in combination, affect the laser damage thresholds ...
Recently, Professor Yuzhi Shi from team of Professor Zhanshan Wang and Professor Xinbin Cheng at the School of Physical Science and Engineering, Tongji University, discovered special properties of optical lateral forces by scanning the entire Poincaré sphere. He found that the polarization state corresponding to the maximum total lateral force is related to the size and refractive index of the ...
Recently, team of Professor Zhanshan Wang and Professor Xinbin Cheng from IPOE proposed a comprehensive performance domain tolerance methodology and successfully developed a prototype for freeform image spectrometers. The results were published in Optics Express with the title “Comprehensive performance domain tolerance analysis methodology for freeform imaging spectrometers”. Imaging spectro...
Recently, team of Professor Zhanshan Wang and Professor Xinbin Cheng from IPOE proposed a spatial-spectral dual adaptive graph embedding model (SDAGE) to exploit the spatial nonlocal similarity (SNS) and spectral band correlation (SBC) in high spatial resolution multispectral (HR MS) and low spatial resolution hyperspectral (LR HS) images for the regularization of their fusion with their collab...
Photon localization and manipulation at the nanoscale is a current research focus in the fields of nanophotonics and integrated photonics. Polaritons, as elementary excitations formed by coupling photons with particles or quasiparticles, exhibit excellent optical field confinement capabilities and offer great potential for realizing nanoscale photonic manipulation. Compared with conventional bu...
Phase, amplitude, and polarization are the three fundamental degrees of freedom of the monochromatic optical field. Modulation of the optical device on the monochromatic optical field can be represented by a 2×2 Jones matrix. Each component of the Jones matrix represents the transmission coefficient of a specific combination of polarization states, consisting of an amplitude channel and a phase...
Recently, team of Professor Zhanshan Wang and Professor Xinbin Cheng from IPOE implemented a multi-channel high spectral resolution integrated on-chip filter in the extended visible bandwidth with Grayscale-patterned EBL. The results were published in Optics Express with the title "Grayscale-patterned integrated multilayer-metal-dielectric microcavities for on-chip multi/hyperspectral imaging i...
Phase, amplitude, and polarization are the three fundamental degrees of freedom of the monochromatic optical field. Modulation of the optical device on the monochromatic optical field can be represented by a 2×2 Jones matrix. Each component of the Jones matrix represents the transmission coefficient of a specific combination of polarization states, consisting of an amplitude channel and a phas...
Scientific discoveries and innovations rely on the constantly emerging techniques of observation and instrumentation. The advantages of extreme ultraviolet, X-ray, and neuron include shorter wavelengths and higher photon or particle energy, attributing them with a higher resolution, “core” level detection of electron state, and larger penetration depth when applied as a technique of observation. Therefore, they have been widely used in microscopy and telescope applications, as well as for the fabrication of ultra-high precisions under extreme conditions.
High-power laser systems and equipment have a significant impact on the solution of major scientific problems, the progress of the national defense equipment, and the development of the high-tech industries, whose core components as well as the weakness are the laser coatings. The research group built a development platform that includes the optimization design of laser coatings, all-flow-control preparation, performance characterization, and system application. They studied the interaction mechanism between the laser and materials and explored the loss mechanism and control techniques of laser coatings. An effective regulation of the coating structure, optical properties, and environmental adaptability has been achieved, which contributes to the development of the high-power laser system.
Being a precision measurement technology on the nanometric scale, nanometrology is a fundamental technology adopted by advanced nano-fabrication. The development of nanometrological standard substances is vital, not only to guarantee the dissemination of traceability, an elementary topic in nanometrology, but also to ensure the unity and accuracy of nano-geometric measurements. Thus far, nanotechnology is evolving towards the direction of reducing characteristic dimensions, which has forced the advanced manufacturing industry to urgently find nano-length standard substances with high accuracy and stability, including the linewidth, step height, linear scale, pitch (one-dimensional grating, 1D), and grid (two-dimensional grating, 2D).
By virtue of “artificial microstructures”, multi-dimensional optical field modulation can be achieved in micro-nano optics, including the amplitude, phase, polarization, and wavefront, which significantly surpasses the modulation with natural materials. Therefore, research at the micro-nano level is considered a vital branch of optics. Micro-nano optical devices not only promote the thinning and integration of optical systems, but also significantly empower the advancement of intelligent sensing technology, which is one of the key strategical areas of national interest.
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