Near-field nonlinear optical spectroscopy of Langmuir–Blodgett films

Bozhevolnyi, Sergey I.; Geisler, T.

doi:10.1364/josaa.15.002156

Cited by 23 publications

(16 citation statements)

References 19 publications

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“…Very bright spots with sizes of 300 to 500 nm were seen on all SH images. Their brightness depended on the polarization of the light coupled in the fiber revealing the domain structure of the film [4]. The typical FF and SH images are shown in Fig.…”

Section: Resultsmentioning

confidence: 97%

“…Further simulations should be carried out to clarify, for example, the dependence of the SH signal on the angle between the polarization of the incident FF field and the domain nonlinearity axis and on the wavelength of the FF wave in relation to the domain dimensions, bearing in mind the corresponding experimental results [4]. We are conducting further research in this area.…”

Section: Resultsmentioning

confidence: 99%

“…The afore-mentioned features of near-field imaging in the SH-SNOM configuration can be illustrated by considering the results obtained with a multilayer LangmuirBlodgett film of 2-docosylamino-5-nitropyridine (DCANP) as a sample [4]. The experimental set-up consisted of an illumination SNOM (with an uncoated fiber tip as a probe) combined with a shear-force-based feedback system and a mode-locked Ti±sapphire laser whose (linearly polarized) radiation was coupled into the SNOM fiber [2].…”

Section: Resultsmentioning

confidence: 99%

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Image Formation in Second-Harmonic Near-Field Microscopy

Bozhevolnyi¹,

Lozovski²,

Pedersen

et al. 1999

phys. stat. sol. (a)

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A macroscopic self‐consistent approach that enables one to rigorously describe image formation in scanning near‐field optical second‐harmonic generation microscopy is developed. The self‐consistent second‐harmonic field is determined by taking into account both the linear and nonlinear contributions in the effective current, i.e., the currents generated by the self‐consistent fields at the fundamental and second‐harmonic frequencies. The self‐consistent problem for both frequencies is solved exactly by use of the diagram technique adapted from quantum electrodynamics. Preliminary numerical results calculated for a rectangular object are presented and compared with experimental observations. It is demonstrated that the optical contrast and the spatial resolution are significantly better in the second‐harmonic images than in the images obtained at the fundamental frequency.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Image Formation in Second-Harmonic Near-Field Microscopy

Bozhevolnyi¹,

Lozovski²,

Pedersen

et al. 1999

phys. stat. sol. (a)

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“…A number of studies of SHG using near-field optics have been reported (Bozhevolnyi and Geisler, 1998;Kajikawa et al, 1998;Shen et al, 2000; , 2001a). For the sake of convenience, the work reported here is that performed at our Institute Shen et al, 2001a).…”

Section: Study Of Nonlinear Optical Processesmentioning

confidence: 99%

Near‐Field Interaction and Microscopy

Prasad¹

2004

Nanophotonics

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This chapter discusses the principles and applications of near-field optics where a near-field geometry is utilized to confine light on nanometer scale. These principles form the basis of near-field scanning optical microscopy (NSOM), which provides a resolution of Յ 100 nm, significantly better than the diffraction limit imposed on far-field microscopy. NSOM is emerging as a powerful technique for studying optical interactions in nanodomains as well as for nanoscopic imaging. The applications of NSOM have ranged from single-molecule detection to bioimaging of viruses and bacteria. Bioimaging using NSOM is described separately in Chapter 13.After a general description of near-field optics in Section 3.1, theoretical modeling of near-field nanoscopic interactions is presented in Section 3.2. Readers less theoretically inclined may skip this section. Section 3.3 presents various approaches used for near-field microscopy. Some illustrative examples of optical interactions and dynamics utilizing NSOM are presented in various sections. Section 3.4 discusses spectroscopy of quantum dots and single molecules, as well as studies of nonlinear optical processes in nanoscopic domains. Section 3.5 introduces apertureless NSOM that utilizes a metallic tip to enhance the local field. Applications of this approach are peresented. Section 3.6 discusses enhancement of optical interactions using a surface plasmon geometry incorporated in an NSOM assembly. Section 3.7 describes time-and space-resolved studies of nanoscale dynamics.Section 3.8 lists some of the commercial manufacturers of near-field microscopes. Section 3.9 provides highlights of the chapter.For further reading, the following books and reviews are recommended:

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“…15-18͒ overcomes the diffraction limit and allows studies of optical interactions in nanoscopic regions. [19][20][21][22][23] The fine resolution offered by NSOM and PSTM is helpful to resolve the local features on a nanometric scale and obtain a better understanding of relationships between microscopic and macroscopic optical nonlinearities of molecular crystals, which may, in turn, supply additional insight into molecular engineering for optimization of nonlinear organic crystals. In this letter, we present second-harmonic ͑SH͒ and sumfrequency ͑SF͒ studies using PSTM to probe the nanoscale nonlinear optical interactions of N-͑4-nitrophenyl͒-͑L͒prolinol ͑NPP͒ crystals.…”

mentioning

confidence: 99%

Second-harmonic and sum-frequency imaging of organic nanocrystals with photon scanning tunneling microscope

Shen

Swiatkiewicz

Winiarz

et al. 2000

Applied Physics Letters

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Sum-frequency generation in doubly resonant GaP photonic crystal nanocavities Appl. Phys. Lett. 97, 043103 (2010); 10.1063/1.3469936Near-field microscopy and spectroscopy of third-harmonic generation and two-photon excitation in nonlinear organic crystals Second-harmonic generation and sum-frequency generation with photon scanning tunneling microscopy and shear-force detection are used to map the nonlinear optical response and the surface topograph of N-͑4-nitrophenyl͒-͑L͒-prolinol crystals with a subdiffraction-limited resolution. The domain-size dependence of the spatial feature is obtained, which shows the local orientational distribution of the optical near field radiated by nonlinear nanocrystals and reveals the difference between nanoscopic and macroscopic second-order optical nonlinearities of molecular crystals.

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Near-field nonlinear optical spectroscopy of Langmuir–Blodgett films

Cited by 23 publications

References 19 publications

Image Formation in Second-Harmonic Near-Field Microscopy

Image Formation in Second-Harmonic Near-Field Microscopy

Near‐Field Interaction and Microscopy

Second-harmonic and sum-frequency imaging of organic nanocrystals with photon scanning tunneling microscope

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