TITLE

Random lasing in human tissues

AUTHOR(S)
Polson, Randal C.; Vardeny, Z. Valy
PUB. DATE
August 2004
SOURCE
Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1289
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A random collection of scatterers in a gain medium can produce coherent laser emission lines dubbed “random lasing.” We show that biological tissues, including human tissues, can support coherent random lasing when infiltrated with a concentrated laser dye solution. To extract a typical random resonator size within the tissue we average the power Fourier transform of random laser spectra collected from many excitation locations in the tissue; we verified this procedure by a computer simulation. Surprisingly, we found that malignant tissues show many more laser lines compared to healthy tissues taken from the same organ. Consequently, the obtained typical random resonator was found to be different for healthy and cancerous tissues, and this may lead to a technique for separating malignant from healthy tissues for diagnostic imaging.
ACCESSION #
14084999

 

Related Articles

  • Terahertz imaging using an interferometric array. Federici, John F.; Gary, Dale; Schulkin, Brian; Feng Huang; Altan, Hakan; Barat, Robert; Zimdars, David // Applied Physics Letters;9/22/2003, Vol. 83 Issue 12, p2477 

    Most methods of imaging in the terahertz (THz) spectral region utilize either pulsed-laser sources or require the THz generation and detection sources to be phase coherent. The application of interferometric imaging to the THz range is described. Interferometric imaging offers considerable...

  • High-intensity bowtie VCSEL enables near-field applications. Overton, Gail // Laser Focus World;Oct2007, Vol. 43 Issue 10, p50 

    The article provides information concerning the high-intensity bowtie nanoaperture vertical-cavity surface-emitting lasers (VCSELs) in the U.S. The author says that nanoaperture VCSELs are ideal for near-field applications as optical recording and single-molecule fluorescence and spectroscopy....

  • Terahertz frequency comb by multifrequency-heterodyning photoconductive detection for high-accuracy, high-resolution terahertz spectroscopy. Yasui, Takeshi; Kabetani, Yasuhiro; Saneyoshi, Eisuke; Yokoyama, Shuko; Araki, Tsutomu // Applied Physics Letters;6/12/2006, Vol. 88 Issue 24, p241104 

    We report a terahertz spectroscopy technique based on a stable terahertz frequency comb from a photoconductive terahertz emitter driven by a stabilized femtosecond laser. To this end, a photocurrent frequency comb is induced in a photoconductive terahertz detector by instantaneous photogating...

  • A Critical Analysis of Investigation of Deep Levels in High-Resistivity CdS Single Crystals by Photoelectric Transient Spectroscopy. A. P. Odrinski&icaron;, V. G. // Semiconductors;Mar2004, Vol. 38 Issue 3, p298 

    The investigation of high-resistivity CdS single crystals by photoelectric deep-level transient spectroscopy (PEDLTS) is discussed. Computer simulation of the experiment is carried out. This simulation enables us to compare the results obtained by the PEDLTS and thermally stimulated conductivity...

  • Problems of excess noise and adequate laser models. Khanin, Ya I. // Radiophysics & Quantum Electronics;Oct2004, Vol. 47 Issue 10/11, p715 

    We discuss the problem of excess noise in lasers of different dynamical classes, as well as adequate models for the description of such noise. It is shown that the excess noise in lasers is caused by mode-mode coupling. The linear coupling leads to the phenomenon of excess noise in the narrow...

  • Semiconductor laser device modeling. Moloney, J. V. // AIP Conference Proceedings;2000, Vol. 548 Issue 1, p149 

    The semiconductor laser offers enormous advantages as a practical device in many technological applications because of its very large gain per unit length. This translates into compact size, making it an ideal system for integration into complex integrated opto-electronic systems networks....

  • TWO APPROACHES FOR INCOHERENT PROPAGATION OF LIGHT IN RIGOROUS NUMERICAL SIMULATIONS. Campa, Andrej; Krc, Janez; Topic, Marko // Progress in Electromagnetics Research;2013, Vol. 137, p187 

    In multidimensional numerical simulations of optoelectronic devices the rigorous Maxwell equations are solved in different ways. However, numerically efficient incoherent propagation of light inside the layers has not been resolved yet. In this paper we present two time- and resource-efficient...

  • Observation of discrete supercontinuum spectra from a multi-pulse pumped distributed feedback dye laser. Khan, N.; Mariun, N. // Applied Physics B: Lasers & Optics;Jan2004, Vol. 78 Issue 2, p179 

    A new approach to the generation of uniformly sliced supercontinuum is reported. It is based on a multi-pulse pumped distributed feedback dye laser rather than on the conventional propagation of femtosecond pulses through air or photonic molecules. Recent developments in supercontinuum...

  • Modì: a new mobile instrument for in situ double-pulse LIBS analysis. Bertolini, A.; Carelli, G.; Francesconi, F.; Francesconi, M.; Marchesini, L.; Marsili, P.; Sorrentino, F.; Cristoforetti, G.; Legnaioli, S.; Palleschi, V.; Pardini, L.; Salvetti, A. // Analytical & Bioanalytical Chemistry;Jun2006, Vol. 385 Issue 2, p240 

    Laser-induced breakdown spectroscopy (LIBS) is a promising technique for in situ elemental analysis. A new mobile instrument for LIBS analysis, developed in a collaboration between Marwan Technology s.r.l. and the Applied Laser Spectroscopy Laboratory in Pisa, is presented, and some applications...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics