improving near field confinement of a bowtie aperture using surface plasmon polaritons

... Improving near- field confinement of a bowtie aperture using surface plasmon polaritons Pornsak Srisungsitthisunti, 1 Okan K. Ersoy, 2 and Xianfan Xu 1 ,a 1 School of Mechanical Engineering and ... confinement of a bowtie aperture along the polarization axis. These circular grooves with period near half the wavelength of surface plasmon polaritons reduce t...

Ngày tải lên: 06/05/2014, 08:53

... system we can now obtain weak optical signals, for example, Raman Spectra of Vietnam petrol extracts excited by not only an 2W Argon laser but also by a 30mW He-Ne laser. Key words: Raman spectroscopy, ... spectroscopy, Optical- Second Harmonic Spectroscopy, Surface SH generation. 1. Introduction Laser Raman spectroscopy including Raman Scattering, Resonance Raman Scattering, Stim...

Ngày tải lên: 05/03/2014, 14:20

... introduced above, Gia Vong – a river basin in Quang Tri was taken as a case study (Figure 3.1). The basin has an area of about 275 km 2 , a perimeter of 111.9 km and an average rainfall of 2500 ... peak flow of observation is much higher than that of simulation. This can be attributed to both of the large interval of rainfall data and the changes of basin charact...

Ngày tải lên: 22/03/2014, 12:20

... two fault planes. The shape and the area of the ruptured zone is very different in the two cases. For the near- vertical plane, the rupture zone has an elongated shape and may cover an area of ... for each station. We estimate an active fault area of 0.02 to 0.15 km2 and deduce a stress-drop value of 1 to 30 bar and an average slip of 0.1 to 1.6 cm. The selected...

Ngày tải lên: 23/03/2014, 13:20

... optical near field of a nanoscale bowtie antenna Rui Guo*, Edward C. Kinzel, Yan Li, Sreemanth M. Uppuluri, Arvind Raman, and Xianfan Xu School of Mechanical Engineering and Birck Nanotechnology ... Changing the aperture shape has been shown to dramatically improve their efficiency. One example is nanoscale ridge aperture antennas [1,2]. A bowtie- shaped aperture can...

Ngày tải lên: 06/05/2014, 08:54

... optical near field of a nanoscale bowtie antenna Rui Guo*, Edward C. Kinzel, Yan Li, Sreemanth M. Uppuluri, Arvind Raman, and Xianfan Xu School of Mechanical Engineering and Birck Nanotechnology ... Changing the aperture shape has been shown to dramatically improve their efficiency. One example is nanoscale ridge aperture antennas [1,2]. A bowtie- shaped aperture can...

Ngày tải lên: 06/05/2014, 08:58

... same opening area as the two bowtie apertures, and a 33ϫ33 nm 2 square aperture having the same area as the gap of the bowtie aperture were fabricated ͑left column of Fig. 1͒. Transmission of ... size of the aperture at the apex of the probe determines the ultimate optical resolution. Nowadays, ta- pered optical fibers and microfabricated cantilever aperture probes are...

Ngày tải lên: 06/05/2014, 08:55

... critical in urban and peri-urban areas where caregiv- ers have more access to financial means and greater availability of alternative treatments. Lesson 4: The availability of anti-diarheal products ... in rural areas of Siem Reap and Pursat. The partnerships also facilitated an extensive training program of partners and providers on diarrheal disease, pre- vention, and treatment...

Ngày tải lên: 12/02/2014, 19:20

... show that the fibers of F containing a point of S Y have cardinality at most (n!) r . Another way to think of the method is as follows: we can factor F Σ as (A n ) r → X = (A n ) r /S n → A =SpecR Σ where ... commands InvariantRing, PrimaryInvariants, and SecondaryInvariants in Magma.) One checks that R = R/f 1 R is an integral domain. Let S be the subring of R generated by f 2...

Ngày tải lên: 06/03/2014, 08:21

... resistant to oxidation, and have a high aspect ratio, a- Fe 2 O 3 NWs are a candidate emitters for FE applications. It has been reported that an electrical field of 7–8 V/lm is required to obtain a ... caused by a rapid thermal oxidation rate on the surface of the film during the temperature ramping period. The defects can be seen as crackings on the surface of the film (Fig....

Ngày tải lên: 20/03/2014, 13:08