| 摘要 |
The invention relates to an optical probe (1) for detecting SERS-active molecules, which probe can transmit incident electromagnetic radiation at a predetermined wavelength and comprises a core (2) of cross-section S and a shell (3), wherein the core (2) in turn comprises a first tapered portion (4) and a second portion (5) of substantially constant cross-section s and length 1, wherein the second portion (5) is connected to the first tapered portion (4) and is covered at least partially by a coating (7) of SERS-active metallic material, the first portion (4) and the remaining part of the second portion (5) being covered with a coating (7') of an at least partially reflective metallic material and wherein the cross-section s of the second portion (5) is within the range of from 10<SUP>-8</SUP>*S to 0.99*S and the length 1 of the second portion is within the range of from 0.01*/IS to 10<SUP>5*</SUP>VS. In a further embodiment, the optical-fibre probe (1) comprises a third tapered portion (6), the second portion (5) of substantially constant cross-section s connecting the first tapered portion (4) and the third tapered portion (6), and wherein the at least partially reflective coating is also applied to the third tapered portion (6). In a preferred embodiment, the first portion (4), the second portion (5), and the third portion (6) are substantially covered with SERS-active material.
|
