By Vladimir M. Shalaev PhD, Satoshi Kawata
Present advancements in optical applied sciences are being directed towards nanoscale units with subwavelength dimensions, during which photons are manipulated at the nanoscale. even if gentle is obviously the quickest ability to ship info to and from the nanoscale, there's a primary incompatibility among mild on the microscale and units and strategies on the nanoscale. Nanostructured metals which aid floor plasmon modes can focus electromagnetic (EM) fields to a small fraction of a wavelength whereas improving neighborhood box strengths through numerous orders of value. as a result, plasmonic nanostructures can function optical couplers around the nano–micro interface: metal–dielectric and metal–semiconductor nanostructures can act as optical nanoantennae and improve gentle topic coupling in nanoscale units. This e-book describes how you can totally combine plasmonic nanostructures into dielectric, semiconductor, and molecular photonic units, for steering photons around the nano–micro interface and for detecting molecules with unsurpassed sensitivity.
·Nanophotonics and Nanoplasmonics
·Metamaterials and negative-index materials
·Plasmon-enhanced sensing and spectroscopy
·Imaging and sensing at the nanoscale
Read or Download Nanophotonics with Surface Plasmons (Advances in Nano-Optics and Nano-Photonics) PDF
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Additional resources for Nanophotonics with Surface Plasmons (Advances in Nano-Optics and Nano-Photonics)
It suffers, however, from the drawbacks of rather low-signal levels and the spatially inhomogeneous distribution of surface roughness features. Experimental work on SPPs relies almost exclusively on (structured) metal thin ﬁlms deposited on a transparent substrate. The SPP modes sustained at the metal/air interface are thus leaky waves that radiate into the substrate in reversal of the Kretschmann excitation scheme (Raether, 1988). Each object point on the metal surface radiates in proportion to the local SPP intensity.
13). 5 dB) larger than that ($11 dB) of the reference stripe and the temporal response was similar to that of the MZIM (ﬁg. 12). The extinction ratio continued to increase for larger signal powers, reaching $34 dB at 82 mW and stayed above 25 dB even at the ﬁrst sidelobe (at 110 mW). 3 dB 20 83 mW 0 0 20 40 60 80 100 120 Applied electrical power (mW) Fig. 13. Switching characteristics of the DCS. Without applied electrical current, the optical radiation is efﬁciently tunneled from the direct arm excited at the DCS input into the coupled arm.
5-mm-wide strip excited at a frequency corresponding to a wavelength of 800 nm in vacuum. Besides the very neat ﬁeld conﬁnement of the MS-SPP mode, a transverse three-peak structure is visible on the PSTM image. 5 mm. The transverse cross-cuts of these PSTM images are shown in ﬁg. 3. Again, we observe that the MS achieves a very efﬁcient lateral conﬁnement of the SPP ﬁeld. Indeed, for strips with a width equal or larger than about three times the incident free-space wavelength (l0 ¼ 800 nm), the near-ﬁeld intensity drops to zero within the width of the waveguides.