6 results about "Resonance fluorescence" patented technology

The application discloses a full-polarization resonant fluorescence laser radar ultra-narrow band filter and relates to the technical field of laser radar detection. The full-polarization resonant fluorescence laser radar ultra-narrow band filter comprises a first polarization beam splitter, a single-atom vapor cell, a working parameter control device, first and second polarized light optical paths, a plurality of relay lenses and a beam combiner. The optical paths guide the first and second polarized light to be incident from two sides of the single-atom vapor cell in opposite directions, the optical path length of the second polarized light optical path is longer than that of the first polarized light optical path, and the plurality of relay lenses are configured to compensate for the optical path difference, so that the two polarized lights have consistent beam parameters when entering the vapor cell. The single-cell opposite incidence and optical path compensation are adopted, the problems of inconsistent parameters in the double-cell scheme and large energy loss in the single-cell scheme in the prior art are solved, and efficient filtering of full-polarization signals under consistent physical conditions is ensured.

A light-emitting layer, a light-emitting device and a light-emitting apparatus are provided. The light-emitting layer includes a thermally activated delayed fluorescence (TADF) material, a phosphorescent material, a multiple resonance fluorescent material and a host material.

The application belongs to the technical field of environmental monitoring, and discloses a hydrogen-oxygen radical online generation and reference checking method, device and application. The device comprises a laser light splitting unit, a laser collimation and focusing lens group, a laser incidence cavity, a reference cavity, a laser emission cavity and an atmospheric hydrogen-oxygen radical measurement cavity. The device can not only continuously and stably generate high-concentration hydrogen-oxygen radicals, but also can monitor the resonance fluorescence signal generated by the hydrogen-oxygen radicals in real time. The device has the advantages of high signal-to-noise ratio, low cost, good adaptability, stable and reliable operation, etc. As a key core component of a laser-induced fluorescence method radical measurement system, the device can be directly applied to wavelength monitoring and locking of a dye laser, and can be used for wavelength calibration of the dye laser instead of a wavelength meter.

The application relates to a surface plasmon resonance-fluorescence dual-mode seawater iron ion detection method and system of a tapered optical fiber probe, and belongs to the technical field of optical fiber sensing and ion detection. The application aims at the problems of single detection mechanism, insufficient anti-interference ability in a complex environment and complex system structure of an existing iron ion detection mechanism, and provides a dual-mode detection scheme. The system excites a fluorescence response through a first light source, generates an SPR response through a second light source, contacts a tapered optical fiber probe plated with a gold film with a to-be-detected liquid containing tannic acid, and realizes synchronous acquisition of dual signals. A signal processing module performs fusion calculation based on a dual-signal quantitative analysis model, and cross verification is realized through the synergistic effect of the two optical response mechanisms. The application not only significantly improves the accuracy and stability of detection results, but also simplifies the probe preparation process, improves the system integration, and is suitable for on-site rapid detection of iron ions in seawater and other complex matrices.

The invention discloses an iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method, and belongs to the technical field of low ionosphere detection. According to the iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method, an iron resonance fluorescence laser radar simulation model is constructed, and photon echo signals are simulated in combination with an NRLMSIS-00 atmosphere model and actually measured iron atom density data; analyzing the influence of laser frequency jitter and light quantum noise on the inversion precision by adopting a Monte Carlo method; then, the error performance of a frequency scanning method and the error performance of a three-frequency ratio method are compared, it is proved that the error of the frequency scanning method in temperature inversion is lower, and the iron resonance fluorescence laser radar temperature and wind speed inversion error analysis method can provide guidance for systematic error modeling and parameter design of an iron resonance fluorescence laser radar; and the accuracy of atmospheric temperature and wind speed inversion can be improved.

This invention provides a light-emitting layer comprising: a TADF material, a phosphorescent material, a multi-resonance fluorescent material, and a host material. The addition of the phosphorescent material to the light-emitting layer enables it to receive triplet excitons, which can then be transferred to the singlet energy levels of the multi-resonance fluorescent material, reducing the number of triplet excitons within the device and improving its lifetime. The multi-resonance fluorescent material can convert triplet excitons into singlet excitons while receiving a small number, improving the device's efficiency. Due to the dual quenching effect of the phosphorescent material and the multi-resonance fluorescent material on the TADF material, the luminescence of the TADF material can be completely suppressed, improving the stability of the emission spectrum. This invention also provides a light-emitting device and a light-emitting apparatus.