Nano fabricated amplifier for semiconductor epitaxial laser A major challenge for building a widely tunable external cavity Mid-Infrared (MIR) laser using latest semiconductor epitaxial (epi) laser is to apply the Anti-Reflection (AR) coating that could turn the otherwise Fabry-Perot (FP) epi laser waveguide into an amplifier. As the epi laser waveguide are progressing rapidly in terms of tunin...

radar absorbing materials, i.e. magnetite (fe3o4) coated carbon fibers (mccfs) were fabricated by electro-deposition technique. black-colored single spinel phase fe3o4 nanoparticles was easily synthesized by hydrothermal method using reduction of a fe (iii) - triethanolamine complex in an aqueous alkaline solution at 60-80 ◦c. uniform and compact fe3o4 films were fabricated on nitric acid treat...

(d) Mechanical propert, Defiexion method, brittle coating method, bonded wire technique, moist coating method, vibration methods involving frequency and damping or damping changes during fatigue test. (e) Penetrating radiation tests. (f) Ultrasonic testing Reflection or through transmission methods. (g) Magneto-inductive tests. (h) Electrical tests. Electrical resistance or tribo-electrical met...

The electromagnetic backscattering of a crosscut of a cruise missile coated by a thin homogeneous layer made of radar absorbent material is modeled using a finite element method. Based on the radar cross section and a reflection coefficient, optimization problems are formulated for evaders and interrogators leading to optimal material parameters for the coating and optimal monostatic radar oper...

This study reports a high-resolution hard-mask laser writing technique to facilitate the selective etching of crystalline silicon (c-Si) into an inverted-pyramidal texture with feature size and periodicity on the order of the wavelength which, thus, provides for both anti-reflection and effective light-trapping of infrared and visible light. The process also enables engineered positional placem...

The crevice correction is a common type of localized corrosion which costs multibillion dollar losses in many different fields including aerospace, automobile, and building structures. The crevice geometry can easily catch moisture and impurity which accelerates the chemical corrosion. It is one of the dangerous corrosions that can cause sudden failure of the products and involve the human inju...