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How Biophotonics Is Harnessing Light for Health And Science







Fifty or so years ago French physicist Pierre Aigrain coined the term photonics as a research field whose goal was to use light to perform functions that traditionally fell within the typical domain of electronics, such as telecommunications, and information processing.

Or maybe it was John Campbell who, in a letter sent to Gotthard Gunther in 1954, wrote, “Incidentally, I’ve decided to invent a new science — photonics. It bears the same relationship to Optics that electronics does to electrical engineering. Photonics, like electronics, will deal with the individual units; optics and EE deal with the group phenomena! And note that you can do things with electronics that are impossible in electrical engineering!”

Naming rights aside, the field of photonics began in earnest between 1958 and 1960 with the invention of the maser and the laser. The laser diode followed during the 1970s, optical fibers and the erbium-doped fiber amplifier after that, and, pretty soon, the telecommunications revolution was taking place and the infrastructure for the internet was forming.

Though the word biophotonics can be traced to Alexander Gurwitsch’s 1923 discovery that living organisms emit an ultra-weak light, the term itself has only been around since the mid-1980s. Since then, biophotonics – a light-based method that gathers information about biological processes at the molecular, cellular, and organismal levels – has been used in many applications including medicine, biology, physics, and engineering.

The Advantages Of Biophotonics

Today, biophotonics is used to describe any technique dealing with the interaction between biological items and photons. This refers to emissions, detection, absorption, reflection, modification, and creation of radiation from biomolecular, cells, tissues, organisms, and biomaterials. In addition to the applications noted earlier – biophotonics is used in industries such as life science, medicine, agriculture, and environmental science.

There is a difference between the use of light for therapy and surgery, where it serves the purpose of transferring energy, and its use for diagnostics. In the latter case, light is utilized to excite matter and provide information to the operator. Biophotonics is usually associated with the latter type of application.

The application of biophotonics brings with it many advantages, including a diverse spatial scale writes AIP Publishing. “The spatial dimensions of biological objects that can be probed or manipulated by light range from approximately nanometer (biological molecules) to approximately centimeter (biological tissue), spanning more than several orders of magnitude in size. For example, superresolution fluorescence microscopy can image the intracellular localization of proteins and RNA in detail while endoscopy can detect cancer tumors in vivo.”


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