44results about How to "Improve thermal properties" patented technology

The invention relates to a single-mode high-power vertical cavity surface emitting laser (VCSEL), which belongs to the field of semiconductor photoelectronics. The laser is characterized by comprising a P-type electrode (1), a P-type Si substrate (2), a metal bonding layer (3), a P-type distributed Bragg reflector (DBR) (4), an oxide limiting layer (5), an active area (6), an N-type DBR (7), a SiO2 mask (8), polymide or benzocyclobutene (BCB) (9), an N electrode (10), a photonic crystal (11) and a light-exiting window (12). The introduction of the photonic crystal into the vertical cavity surface emitting laser with the structure can enlarge an oxidation aperture and improve the single-mode output power; and at the same time, the transfer of the conventional VCSEL epitaxial wafer to the Si substrate by adopting bonding technology and the adoption of a design of exiting light at the bottom are convenient for narrowing the distance between a VCSEL epitaxial wafer active area and the Si substrate, improving the thermal characteristics of devices and further improving the single-mode output power.

The invention belongs to the technical field of soil remediation, and specifically relates to a method for remediating lead-cadmium-contaminated soil. Aiming at the combined remediation of lead-cadmium contaminated soil, a combined remediation method of adsorption solidification and microbial remediation is adopted, which specifically includes the following steps: Sprinkle the soil with adsorbent and passivation agent, spray water at the same time, then deep plow 5-8cm, and place it for 10-15 days; sprinkle the compound bacterial preparation into the soil, shallow plow 3-5cm, then spray the film-forming liquid on the soil, set aside 10‑15 days; adopt the combined repair method of adsorption solidification and microbial repair, firstly absorb and solidify heavy metals through the action of adsorbents and passivators, and then use microorganisms to digest and transform the adsorbed and solidified heavy metals, Then reduce the content of heavy metals in the soil and prevent heavy metals from redissolving.

The invention relates to a silicon-based optical pulse modulator device and application. The silicon-based optical pulse modulator is characterized in that monocrystalline silicone is processed into a silicon wafer, 32S or 32S and 11B together are injected into the silicon wafer by an ion injection method, the silicon wafer is subjected to twin polishing, and a high-penetration medium film of 1.3-1.6 micrometers is plated or not on the surface of the silicon wafer. The silicon-based optical pulse modulator device is used for a laser, pump light passes a laser gain medium and then passes a silicon-based optical pulse component, and a front endoscope in front of the laser gain medium and a rear endoscope behind the silicon-based optical pulse component constitute a resonance cavity. The silicon-based optical pulse modulator device is used for adjusting loss of laser of 1.3-1.6 micrometers. The silicon-based optical pulse modulator device is simple to manufacture and low in cost, miniaturization of products and industrialized production are facilitated.