|
|
|
|
micro-cones array-based plasmonic metasurface for sensitive and enhanced raman detection
|
|
|
|
|
|
|
|
نویسنده
|
cui songya ,tian chengxiang ,su yarong ,tian jiaguo ,fu yongqi
|
|
منبع
|
plasmonics - 2020 - دوره : 15 - شماره : 6 - صفحه:2003 -2009
|
|
چکیده
|
We report a micro-cone unit-based plasmonic metasurface for surface-enhanced raman spectroscopy. the unit consists of au cone-shaped needle, au thin film, and sio2 substrate. to verify performance of the structure for surface-enhanced raman scattering (sers) detection, both theoretical and experimental studies are performed. highly efficient coupling conditions satisfied by the structure, ∇φ > k0, the metasurface can realize the sers measurement with detection limit and analytical enhancement factor (aef) as high as 10−8 m and 109, respectively. with concentrations of benzenethiol ranging from 10−2 down to 10−8 m, the ratio of raman intensity iω2/iω1 increases from 0.6 to 0.85 and iω3/iω1 from 0.9 to 1.3. this structure can provide a new insight for biosensing and biochemistry analyses.
|
|
کلیدواژه
|
micro-cone-like unit ,plasmonic metasurface ,sers ,benzenethiol ,aef
|
|
آدرس
|
university of electronic science and technology of china, school of physics, china, university of electronic science and technology of china, school of physics, china, sichuan normal university, college of physics and electronic engineering, china, university of electronic science and technology of china, school of physics, china, university of electronic science and technology of china, school of physics, china
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Authors
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|