Search Results for: spectroscopy
STEM and Inclusion: Women’s Contributions to Optics and Photonics
Introduction: Women make up about 19% of SPIE Optics and Photonics (one of the leading optics/photonics exhibitions and conferences) plenary speakers, representative of an overall lack of diversity in ...
Digital Holography: Interferometric Imaging of Biological Samples
High Resolution Microscopy Image quality in high-resolution optical microscopy is predominately restricted by the diffraction limit– a fundamental consequence of using lenses. High-resolution ...
Semiconductors: Two High Impact Applications
Semiconductors are essential for modern day life as we know it. From their usage in integrated circuits for computers’ logic functions to satellite communications, semiconductors allow for efficient ...
Semiconductor Nanowire Photodetectors and Lasers
Nanowires are truly one-dimensional structures that are long in one direction and short on the lateral dimension. This dimensional reduction gives rise to interesting new phenomena such as quantized ...
Raman Lasers: Non-Linear Light Generation for Broadband Applications
Raman scattering phenomenon can be used to engineer broadband tunable lasers and to generate a broad band of frequencies in the IR spectrum. These light sources are instrumental for probing and detecting ...
Photodiodes: Detecting Photons with Electrons
Photoelectronic devices combine the vast use of electronics for processing information with the detection and the manipulation of light. Devices such as photodiodes are useful for detecting incoming light ...
Variable-Focus Adaptive Lenses for Presbyopia Correction
Introduction to Presbyopia As we grow older the lens of the eye becomes much more rigid, hindering the ability to properly focus light onto the retina. This condition, presbyopia, affects approximately two ...
Charge Coupled Devices and CMOS Sensors for Superior Imaging
Imaging tools help us see into the world that is not possible with our naked eyes. It was with the invention of the microscope and the telescope that big frontiers in science were reached. We unlocked the ...
Photoacoustic Communication: Using Light to Deliver Audible Messages
Introduction to the Photoacoustic Effect Alexander Graham Bell, a prolific inventor most celebrated for inventing the telephone, first observed the photoacoustic effect in 1880. Bell was experimenting with ...
Nitride Semiconductors: Diode Lasers for Visible and UV Light
Semiconductor lasers apart from silicon itself have dominated the LED industry because of their better efficiency in light emission. However, at first, most of such devices emitted light in the red to ...