TY - GEN
T1 - Single-particle optical scattering spectroscopy in white light supercontinuum optical tweezers
AU - Li, Peng
AU - Shi, Kebin
AU - Liu, Zhiwen
PY - 2006
Y1 - 2006
N2 - White light supercontinuum, which is generated by coupling short laser pulses into a nonlinear photonic crystal fiber, not only covers an extremely broad wavelength range (e.g., from visible to near infrared) but also has high spatial coherence. As a result, tightly focused supercontinuum can be used to trap a single particle and simultaneously to perform broad-band ultra-sensitive optical spectroscopy at a single particle level. In this paper we investigate the optical scattering spectroscopy of a single particle in white light supercontinuum optical tweezers. Lorenz-Mie theory and Fourier angular spectrum analysis are used to model the scattering of tightly focused supercontinuum by a uniform spherical scatterer. In addition, Born approximation method is applied to analyze scattering by non-spherical weak scatterers. Unlike conventional ensemble averaged spectroscopy, single particle spectroscopy has the unique capability to probe the properties of individual particles, which can lead to many important applications such as ultrasensitive sensing and nanoparticle characterization.
AB - White light supercontinuum, which is generated by coupling short laser pulses into a nonlinear photonic crystal fiber, not only covers an extremely broad wavelength range (e.g., from visible to near infrared) but also has high spatial coherence. As a result, tightly focused supercontinuum can be used to trap a single particle and simultaneously to perform broad-band ultra-sensitive optical spectroscopy at a single particle level. In this paper we investigate the optical scattering spectroscopy of a single particle in white light supercontinuum optical tweezers. Lorenz-Mie theory and Fourier angular spectrum analysis are used to model the scattering of tightly focused supercontinuum by a uniform spherical scatterer. In addition, Born approximation method is applied to analyze scattering by non-spherical weak scatterers. Unlike conventional ensemble averaged spectroscopy, single particle spectroscopy has the unique capability to probe the properties of individual particles, which can lead to many important applications such as ultrasensitive sensing and nanoparticle characterization.
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U2 - 10.1117/12.681437
DO - 10.1117/12.681437
M3 - Conference contribution
AN - SCOPUS:33751409035
SN - 0819464058
SN - 9780819464057
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Optical Trapping and Optical Micromanipulation III
T2 - Optical Trapping and Optical Micromanipulation III
Y2 - 13 August 2006 through 17 August 2006
ER -