Optical nonlinearity versus mechanical anharmonicity contrast in dynamic mode apertureless scanning near-field optical microscopy

BEK, ALPAN; Vogelgesang, R; Kern, K

doi:10.1063/1.2108125

Optical nonlinearity versus mechanical anharmonicity contrast in dynamic mode apertureless scanning near-field optical microscopy

BEK A., Vogelgesang R., Kern K.

APPLIED PHYSICS LETTERS, cilt.87, sa.16, 2005 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 87 Sayı: 16
Basım Tarihi: 2005
Doi Numarası: 10.1063/1.2108125
Dergi Adı: APPLIED PHYSICS LETTERS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

We show that the contrast mechanism in dynamic mode apertureless scanning near-field optical microscopy is in general a combination of both spatially nonlinear optical interaction and temporally anharmonic mechanical cantilever motion. Mechanical factors are found experimentally to easily overshadow the optical signal, leading to artifacts not yet well documented in the literature. Our algebraic analysis provides a systematic framework to identify and control the relative influence of the competing contrast origins. (C) 2005 American Institute of Physics.