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速递书局
| 封面: |
 |
| 题名: |
Nanoplasmonic Sensors (Integrated Analytical Systems) |
| 作者: |
Alexandre Dmitriev |
| 出版社: |
springer |
| 出版日期: |
August 1, 2012 |
| ISBN: |
ISBN-10: 1461439329 ISBN-13: 978-1461439325 |
| 附属页: |
齐全 |
| 书签: |
有 |
| 格式: |
清晰PDF |
| 内容简介: |
Preface
Plasmonics is the science of light-matter coupling through surface plasmon
polaritons (SPPs) or surface plasmons. Simply put, surface plasmons are optically
excited collective oscillations of the free electrons at a metal surface. Formally,
SPPs are the quanta of charge density collective oscillations that are tightly
confined at the interface of materials with negative and positive permittivities.
However, surface plasmons can be comfortably described in the classical electrodynamics
without evoking quantum mechanics. They represent actual mechanical
oscillations (with very small displacements though) of the electron gas under the
influence of the electromagnetic field of the incoming light.
Nanoplasmonics explores surface plasmon modes confined in the nanosized, i.e.,
subwavelength metal structures—localized surface plasmons (LSP). Although light
interaction with nanoscopic matter has been observed for centuries, like stained
glass goblets manufactured in the Roman Empire or spectacular windows in
medieval churches, and was theoretically described already by Michael Faraday
and Gustav Mie more than a century ago, only recently our ability to fabricate and
control the matter at a nanoscale brought to life what is known as nanoplasmonics.
Over the past decade nanoplasmonics has developed into a burgeoning field, where
exciting opportunities are opening for the increasing number of application
areas, including photonics, biomedical imaging and sensing, (photo)catalysis, and
molecular spectroscopy to name a few.
The key features that enable such development are subwavelength confinement,
large cross-section for scattering and absorption of light, and most important
for sensing applications, strongly enhanced electromagnetic fields in the direct
proximity of the nanostructures. Through such field enhancement nanoplasmonic
resonances sensitively depend on the minute variations of the surrounding dielectric
medium. This fact essentially forms the basis for nanoplasmonic sensing—a merely
refractive index sensing, but with the powerful extension that the probed volumes
are in the nanoscale. Small enough so a presence of even single biological or
chemical molecular species becomes detectable in various nanoplasmonic
sensing schemes. |
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发表于 2013-2-1 14:20:49
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