Terahertz light amplification of stimulated emission of radiation in current-injection graphene channel transistor

2019 ◽  
Author(s):  
Stephane Boubanga-Tombet ◽  
Deepika Yadav ◽  
Takayuki Watanabe ◽  
Akira Satou ◽  
Wojciech Knap ◽  
...  
Keyword(s):  
Current Injection ◽  
Stimulated Emission ◽  
Light Amplification

Stimulated Emission by Current Injection from an AlGaN/GaN/GaInN Quantum Well Device

1995 ◽  
Vol 34 (11B) ◽  
pp. L1517 ◽  
Author(s):  
Isamu Akasaki ◽  
Hiroshi Amano ◽  
Shigetoshi Sota ◽  
Hiromitsu Sakai ◽  
Toshiyuki Tanaka ◽  
...  
Keyword(s):  
Quantum Well ◽  
Current Injection ◽  
Stimulated Emission

Terahertz light amplification by stimulated emission of radiation from optically pumped graphene

2011 ◽  
Author(s):  
Taiichi Otsuji ◽  
Stephane A. Boubanga Tombet ◽  
Silvia Chan ◽  
Akira Satou ◽  
Victor Ryzhii
Keyword(s):  
Stimulated Emission ◽  
Optically Pumped ◽  
Light Amplification

Stimulated Emission by Current Injection from an AlGaN/GaN/GaInN Quantum Well Device

1995 ◽  
Vol 34 (Part 2, No. 11B) ◽  
pp. L1517-L1519 ◽  
Author(s):  
Isamu Akasaki ◽  
Hiroshi Amano ◽  
Shigetoshi Sota ◽  
Hiromitsu Sakai ◽  
Toshiyuki Tanaka ◽  
...  
Keyword(s):  
Quantum Well ◽  
Current Injection ◽  
Stimulated Emission

Laser Safety Management

2000 ◽  
Vol 10 (8) ◽  
pp. 428-432
Author(s):  
June Champion
Keyword(s):  
Medical Device ◽  
Safety Management ◽  
Film Industry ◽  
Stimulated Emission ◽  
Health Hazards ◽  
Healthcare Industry ◽  
Current Position ◽  
Laser Safety ◽  
Major Health ◽  
Light Amplification

LASER is an acronym for Light Amplification by Stimulated Emission of Radiation. Since the first working laser was demonstrated in 1960 the laser has evolved from being viewed as a weapon, courtesy of the film industry, to its current position as a commonplace medical device within the healthcare industry. As perioperative staff we have become very familiar with the therapeutic use of this device. It is my experience however that, just occasionally, we are guilty of the old adage ‘familiarity breeds contempt’. We must remember that the very same features which make lasers so useful in healthcare may also represent major health hazards to patients, staff and others.

scholarly journals Láser en odontología: fundamentos físicos y biológicos / Laser in Dentistry: Physical and Biological Foundations

2017 ◽  
Vol 35 (75) ◽  
Author(s):  
Jhon Fredy Briceño Castellanos ◽  
Diego Alejandro Gaviria Beitia ◽  
Yurani Angélica Carranza Rodríguez
Keyword(s):  
Optical Properties ◽  
Biological Effects ◽  
Wave Length ◽  
Stimulated Emission ◽  
Technology Usage ◽  
Review Of Literature ◽  
Laser Technology ◽  
Light Amplification ◽  
Show Evidence ◽  
Extinction Length

RESUMEN. Antecedentes: El láser es una tecnología cada vez más utilizada en Odontología. Para tomar decisiones acertadas con respecto a las características y uso del láser es importante conocer sus bases físicas y biológicas en cuanto a su interacción con los tejidos. Objetivo: Analizar los fundamentos biológicos y físicos del láser en odontología. Métodos: Se realizó una revisión narrativa con base en literatura publicada entre 1990 y 2016 e incluida en el Medline. La muestra consistió en 30 artículos. Para el análisis se empleó un enfoque hermenéutico. Resultados: Los fundamentos físicos analizados incluyen luz, amplificación, emisión estimulada y radiación. En cuanto a los efectos biológicos se analizan el fototérmico, fotoquímico y fotoacústico. Asimismo, se describen las propiedades ópticas de los tejidos orales:  absorción, penetración y longitud de extinción. Conclusiones: No todos los láseres actúan igual y una misma longitud de onda puede tener interacciones diferenciales en los tejidos. Existen varios estudios que evidencian la efectividad del láser en varias especialidades de la odontología y abren la posibilidad de varias líneas de investigación.ABSTRACT. Background: Laser technology usage is increasing in dentistry. In order to take adequate decisions about characteristics and use, it is important to know the physical and biological foundations of laser and its interaction with oral tissues. Objective: To analyze the physical and biological foundations of laser in dentistry. Methods: A narrative review of literature published between 1990 and 2016 and included in Medline was carried out. The sample consisted of 30 articles. Analysis of literature was performed through a hermeneutical approach Results: Physical foundations of laser analyzed include light, amplification, stimulated emission, and radiation. Biological effects studied are photothermal, photochemical, and photoacoustic. In addition, optical properties of oral tissues are described: absorption, penetration, and extinction length. Conclusion: Not all lasers act the same way and the same wave length can interact differently with tissues. Several studies show evidence of the effectiveness of laser in several dental specialties and open the possibility for several lines of research. 

scholarly journals Applications of Light Amplification by Stimulated Emission of Radiation (Lasers) for Restorative Dentistry

2015 ◽  
Vol 25 (3) ◽  
pp. 201-211 ◽  
Author(s):  
Shariq Najeeb ◽  
Zohaib Khurshid ◽  
Muhammad Sohail Zafar ◽  
Syed Ajlal
Keyword(s):  
Stimulated Emission ◽  
Restorative Dentistry ◽  
Light Amplification
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