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Full-Text Articles in Nanoscience and Nanotechnology
Random Lasing In Bone Tissue, Qinghai Song, Shumin Xiao, Zhengbin Xu, Jingjing Liu, Xuanhao Sun, V. Drachev, V. Shalaev, Ozan Akkus, Young Kim
Random Lasing In Bone Tissue, Qinghai Song, Shumin Xiao, Zhengbin Xu, Jingjing Liu, Xuanhao Sun, V. Drachev, V. Shalaev, Ozan Akkus, Young Kim
Zhengbin Xu
Owing to the low-loss and high refractive index variations derived from the basic building block of bone structure, we, for the first time to our knowledge, demonstrate coherent random lasing action originated from the bone structure infiltrated with laser dye, revealing that bone tissue is an ideal biological material for random lasing. Our numerical simulation shows that random lasers are extremely sensitive to subtle structural changes even at nanoscales and can potentially be an excellent tool for probing nanoscale structural alterations in real time as a novel spectroscopic modality. (C) 2010 Optical Society of America
Random Laser Spectroscopy For Nanoscale Perturbation Sensing, Qinghai Song, Shumin Xiao, Zhengbin Xu, V. Shalaev, Young Kim
Random Laser Spectroscopy For Nanoscale Perturbation Sensing, Qinghai Song, Shumin Xiao, Zhengbin Xu, V. Shalaev, Young Kim
Zhengbin Xu
We report a spectroscopic method using coherent random lasers for a simple, yet nanoscale, sensing approach. Unique spectral properties of coherent random laser emission can be detectably altered when introducing nanoscale perturbations to a simple nanocomposite film that consists of dielectric nanospheres and laser-dye-doped polymer to serve as a transducer. Random lasing action provides a means to amplify subtle perturbations to readily detectable spectral shifts in multiple discrete emission peaks. Owing to several advantages, such as large-area detection, narrow and multiple emission peaks, straightforward detection, and simple fabrication, random laser spectroscopy has the potential for ultrasensitive, yet simple, biosensors in …