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Use of tunable second-harmonic signal from KNbO3 nanoneedles to find optimal wavelength for deep-tissue imaging

Cai, Fuhong (author)
Yu, Jiaxin (author)
Qian, Jun (author)
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Wang, Ye (author)
Chen, Zhong (author)
Huang, Jingyun (author)
Ye, Zhizhen (author)
He, Sailing (author)
KTH,Elektroteknisk teori och konstruktion,Zhejiang-KTH Joint Research Center of Photonics, JORCEP
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 (creator_code:org_t)
2014-06-17
2014
English.
In: Laser & Photonics reviews. - : Wiley. - 1863-8880 .- 1863-8899. ; 8:6, s. 865-874
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Nonlinear optical (NLO) responses of perovskite-type nanostructures have a variety of potential applications owing to the highly efficient frequency conversion guaranteed by both the material itself and the nanometer-scale configuration. KNbO3 (KN) nanoneedles have been identified as a promising NLO material because of the superior broadband frequency conversion efficiency, and if incident light is propagating in a direction perpendicular to the axis of a nanoneedle, then the phase-matching constraint can be relaxed. Here, the second-harmonic generation (SHG) and third-harmonic generation (THG) responses of both individual and clustered KN nanoneedles are reported. Based on these results, a novel method is proposed for determining the optimal excitation wavelength for NLO imaging of several biological samples, with KN nanoneedles acting as NLO agents. The method is shown to provide the optical features in the focal plane and a more reliable estimation of the optimal excitation wavelength for deep-tissue imaging.

Subject headings

NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

Keyword

deep-tissue imaging
nonlinear optics
KNbO3 nano-needles
SHG
THG

Publication and Content Type

ref (subject category)
art (subject category)

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