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In 1842, Johann Doppler delivered his paper on Doppler effect to Royal Bohemian Society. In his paper “On the Colored Light of Double Stars and Some Other Heavenly Bodies”, he arrived at the ...

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 ...

Fourier-transform infrared spectroscopy (or FTIR, for short) is a method of exploring the physical properties of solids, liquids, and gases. More specifically, it allows the study of the absorptive and ...

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 ...

New Changes in the Hands of the Everyday Individual: Photonics in Wearable Technology With rapid advancements in common devices like phones and watches, technology has become more prominent in everyday ...

Beam profiling systems are an essential technology to ensure the quality and uniformity of lasers. Beam profilers measure the optical spatial intensity of an input laser beam,  providing information about ...

Non-linear techniques in photonics have opened up new avenues for sensing and manipulating materials. In the 1960s, non-linear techniques were used to discover multiphoton absorption processes in ...

Introduction   Bionic limbs exist in a number of books, movies, and TV shows. Science fiction fans will remember the Steve Austin’s Bionic Arm from his role in The Six Million Dollar Man. Even ...

Work with Mirrors in Advanced Scientific Disciplines Many times when people think of mirrors they fail to think about their advanced scientific applications. However, telescopes and other devices contain ...

Optical myography is a technique that visually inspects the human forearm to determine the hand posture. Hand posture is a communication element as important as the language itself. Human hand gesture ...