(Feb. 13, 2012) -- Researchers Gangadharan Ajith Kumar, Madhab Pokhrel and Dhiraj K. Sardar in the UTSA Laser and Biophotonics Laboratories have develop the world's most intense infrared-activated, light-emitting phosphor. The discovery will advance the underlying technology of LEDs, lasers and other electronic displays.
Photons or light emitting particles are the focus of the scientific discipline photonics. Phosphors are photons that emit colored light when excited with another color. The efficiency of phosphor light output depends on many material properties. While most phosphors excited by ultraviolet light are inefficient and lose a lot of thermal energy, excitation by infrared light makes phosphors more energy efficient and environmentally safe.
The trio created a unique phosphor that produces more intense light than any other infrared-activated phosphor on record. Kumar now is testing the discovery's application with an LED manufacturing company. Pokhrel, a UTSA Ph.D. student, is researching the material's potential to enhance silicon solar cell efficiency.
Recently, the researchers were honored by the Society of Photographic Instrumentation Engineers (SPIE) with one of four Green Photonics awards. They accepted the award at the SPIE Photonics West conference in San Antonio last month.
"When I heard UTSA's name along with Harvard, Caltech and other German researchers who received SPIE's Green Photonics Award, I was really excited," said Kumar. "It was exciting to see that our research was on that level and we were all on the same stage. We hope this attracts more students to UTSA who are interested in researching photonics."
SPIE, the international society for optics and photonics, was founded in 1955 to advance light-based technologies. The society serves more than 180,000 constituents from 168 countries advances emerging technologies through interdisciplinary information exchange, continuing education, publications, patent precedent, and career and professional growth.
The UTSA Department of Physics and Astronomy offers coursework in semiconductor technology, solid-state physics, theoretical physics, astrophysics, computer visualization, lasers and biophotonics, cosmology and relativity. Additionally, UTSA and the Space Science Division at Southwest Research Institute jointly offer a graduate degree in space physics, giving students firsthand experience in instrument and satellite development.
The College of Public Policy and the Office for Community Services present a 100th anniversary salute to the late Congressman Henry B. Gonzalez. A distinguished panel will discuss Gonzalez's historical impact. Free and open to the public.
Aula Canaria Lecture Hall (BV 1.328) , Downtown Campus
Student posters will present case studies based on practicum experiences, literature reviews on topics relevant to educational psychology, and other research experiences this year. The event is free and open to the public.
Durango Building (1.124), Downtown Campus
This end-of-semester concert will feature the 3rd through 8th grade students who have participated in the UTSA String Project this year. The event is free and open to the public.
Buena Vista Theater, Downtown Campus
This three-day event will focus on the tools, tactics and motives involved in computer and network attacks. Attendees from around the world will take part in world-class hands-on trainings and technical discussions.
H-E-B University Center Ballroom, Main Campus
Visit with faculty, alumni and students to discuss the benefits of and requirements for a Master Degree in Public Administration and/or the Graduate Certificate in Nonprofit Administration & Leadership
Buena Vista Building (1.338), Downtown Campus
UTSA Spring Commencement ceremony for the College of Architecture, Construction and Planning, the College of Education and Human Development and the College of Sciences.
UTSA Spring Commencement ceremony for the College of Business, the College of Public Policy and University College.
UTSA Spring Commencement ceremony for the College of Engineering and the College of Liberal and Fine Arts.
The UTSA community is invited to honor the roughly 2,600 UTSA staff members who contribute to the success of the university and its students.
University Center Ballroom, Main Campus
Join UTSA faculty and staff, current students, and area central office administrators/program alumni to learn about this exciting accelerated and web-enhanced program leading to Texas Superintendent Certification. The event is free and open to the public.
Buena Vista Building (1.322), Downtown Campus
Rosales credits UTSA for guiding him from music to Wall Street
The University of Texas at San Antonio is dedicated to the advancement of knowledge through research and discovery, teaching and learning, community engagement and public service. As an institution of access and excellence, UTSA embraces multicultural traditions and serves as a center for intellectual and creative resources as well as a catalyst for socioeconomic development and the commercialization of intellectual property - for Texas, the nation and the world.
To be a premier public research university, providing access to educational excellence and preparing citizen leaders for the global environment.
We encourage an environment of dialogue and discovery, where integrity, excellence, inclusiveness, respect, collaboration and innovation are fostered.