We report measurements of dynamic (ac) electrical conductivity in borosilicate glasses doped with the semiconductors CdSxSe1-x and AgI in a wide range of frequencies and temperatures. The concentrations of homogenously dissolved dopants are governed by the heat treatment conditions of the glass samples leading to a creation of CdSSe and AgI nanocrystals. The ac conductivity rises with increasing average size of the CdSSe nanocrystals, in contrast to the case of the metal halide doped borosilicate glasses.
White Papers
01 September 2011
Thermal imaging cameras allow researchers to not only see volcanic heat, but also to get non contact temperature readings from a safe distance, which keeps the researchers out of harm’s way.
03 June 2011
Carbon fibre reinforced materials in bikes checked with pulse thermography.
06 March 2011
The id210 is the first photon counter for telecom wavelengths that works at frequencies up to 100MHz, can also operate in free running mode, and does not require cryogenic cooling.
03 February 2011
This paper introduces and demonstrates the technique of 'superframing'. The technique of superframing consists of varying the exposure, or integration time of a thermal imaging camera from frame to frame in a cyclic manner and combining the resulting subframes into single superframes with greatly extended temperature ranges, thereby allowing the user to visualize scenes featuring wide temperature differences.
Pages
Latest issue
Lee highlights to European Commissioner Thierry Breton that Europe should play a leading role in photonics
Carlos Lee on the European Photonics Industry Consortium’s latest advocacy efforts
Per Karlsson, CEO of NorthLab Photonics, discusses his career path, the key to effective management, and his advice for future entrepreneurs
Image credit: Maximillian cabinet/Shutterstock.com
Superluminescent LED drivers can help us understand ocean turbulence, here’s how
Image credit: metamorworks/Shutterstock.com
A look at the market for lidar and some of the systems, products and solutions available
Image credit: Francesco Scatena/Shutterstock.com
A look at the market for hyperspectral imaging and some of the products and solutions available
Freeform optics come into their own in applications such as illumination – for example, modern LED headlight designs (credit: i viewfinder/Shutterstock.com)
How optical designers can realise the benefits of using freeform optical elements from the R&D stage when designing for illumination applications
Image credit: Gorodenkoff/Shutterstock.com
A look at the current market for Neurophotonics and some of the products and solutions available
How solid-state light engines can meet the exact needs of many biotech and industrial applications
The space sector offers numerous oppurtunities for photonics technologies in the development and offering of satellite-based services. (Image: Shutterstock/Dima Zel)
The ongoing commercialisation of the space sector is creating numerous opportunities for photonics technologies, Matthew Dale learns
Preliminary testing of the quantum gravity gradiometer designed by Michael Holynski and colleagues at the University of Birmingham, which has now been shown to locate an underground tunnel with a positional accuracy of 20cm. Credit: Crown Copyright
Susan Curtis explores the new breed of quantum gravimeters finding their way onto the slopes of Mount Etna and into tunnels deep under Birmingham
Ams Osram’s multi-junction VCSELs are helping to improve automotive lidar. Credit: Ams Osram
Multi-junction vertical-cavity surface-emitting lasers are likely to displace LEDs and edge-emitting lasers in sensing, finds Andy Extance
At this year’s EPIC AGM Matthew Dale learned that advocacy efforts need to be targeted to ensure an ideal future for the European photonics industry
At this year’s EPIC AGM Matthew Dale learned that increasing advocacy efforts is a must to ensure an ideal future for European photonics
