We describe a compact laser wavelength measuring instrument based on a small diffraction
grating and a consumer-grade webcam. With just 1 pW of optical power, the instrument …

Backilluminated ultraviolet metal-semiconductor-metal photodetectors with different spectral
responsivity bands were demonstrated on a single Al x Ga 1− x N heterostructure. This was …

We present a laser wavelength meter based on a commercial color sensor chip. The chip
consists of an array of photodiodes with different absorptive color filters. By comparing the …

We present a wavelength meter with picometer-scale resolution based on etaloning effects
of inexpensive glass slides and the built-in color filters of a consumer grade CMOS camera …

The prism spectrometer has been the standard apparatus for index of refraction
measurements and a typical instrument in undergraduate laboratories for dispersion …

We present a wavelength sensor setup for monochromatic visible light, based on the double-
layer photo diode WS-7.56. Employing high-precision electronics and automatic …

Zinc oxide (ZnO) nanoparticles created by top-down wet-chemistry synthesis were deposited
onto intrinsic epitaxial grown gallium nitride-based substrates. Aluminum (Al) was …

We present the design of a radiometer that can simultaneously measure both centroid
wavelength and irradiance of a light source without recording its spectrum, when the light …

A practical method to determine the emission frequency of a distributed feedback diode
laser at the D1 line of 133 Cs is reported. By fitting the extracted dips of the saturated …

The absorption edge of AlGaN based alloys can be tuned from deep UV to near UV by
changing the composition. This enables the use of the material in various technological …