Abstract: Embodiments of this invention comprise a lighting device, such as an organic light emitting diode (“OLED”), constructed so as to form a microcavity that is resonant with an emission wavelength of the emitter and with the emitting region located at an antinode of the resonant mode of the cavity. With the emitting region at this location, this resonant mode operates in stimulated emission and causes the excited state population to be locked at a small level. Interference effects may contribute to this by suppressing spontaneous emission into this mode when the emitter is at this location. Because losses are proportional to the excited state population, the losses are constant or near constant while current is increased. Further, because some device degradation processes are also driven by excited state populations, this can extend the device lifetime as well.

Abstract: Embodiments of this invention relate to and, more particularly, to solid state lighting, digital displays, conversion of electrical energy to light, low onset gain saturated stimulate emission, light production with high efficiency and high output per area, and light production while limiting material degradation, and may also be applied in optical or quantum information processing and networking. Embodimenta of this invention comprise spectroscopic configurations having a radiative transition to a depopulated state and an optical configuration having sufficient Q such that the combination allows onset of gain saturation with a small excited state population or low current density, thus enabling production of light in a mode with near total output coupling, high efficiency, high output, low roll-off and attenuation of losses and degradation processes.

Abstract: Embodiments of this invention relate to and, more particularly, to solid state lighting, digital displays, conversion of electrical energy to light, low onset gain saturated stimulate emission, light production with high efficiency and high output per area, and light production while limiting material degradation, and may also be applied in optical or quantum information processing and networking. Embodimenta of this invention comprise spectroscopic configurations having a radiative transition to a depopulated state and an optical configuration having sufficient Q such that the combination allows onset of gain saturation with a small excited state population or low current density, thus enabling production of light in a mode with near total output coupling, high efficiency, high output, low roll-off and attenuation of losses and degradation processes.

Abstract: Apparatus that invention detects and characterizes hard or metallic materials or objects, worn or carried by persons or concealed on their persons or in bags or luggage, using directed or propagated energy such as ultrasound or microwave, that is reflected or scattered by the materials and objects of interest and that has a wavelength or wavelengths such that the width and/or shape of the reflected beam can be measured at the desired detection distance or range of distances and has a measurable dependence on the size and/or shape of the object, utilizing diffraction methods. Also disclosed are a system and a method utilizing this apparatus.

Abstract: Methods and devices are disclosed for measuring vibration and/or mechanical waves, such as acoustic signals, in mechanical systems, for detecting and characterizing mechanical events in mechanical systems, for enhancing the performance of pattern recognition including without limitation artificial intelligence methods, and for monitoring and assessing the condition of mechanical systems such as motors, structures, and structural elements. Applications include, without limitation, jet engine monitoring, failure detection and prediction in composite materials, and physical security for moveable assets such as aircraft.