Search

In this paper, the surface plasmon resonance (SPR) of rectangular cavity is investigated in Ag-Si-SiO2 under near-infrared light incident by finite-difference time-domain (FDTD). Between the surface plasma and the thickness of the silver film, the length of the silver film, the thickness of silicon, and the position of silicon, these relationships will be studied in a rectangular cavity, which is surrounded by silver film, two rectangular nanoscale silicons, and silicon dioxide. The surface plasmon resonance of the RCM is independent of the distance between the two silicons when the transverse silver film length l is fixed and of height d = 10k (k = 1, 2, 3, 4, and 5) nm of rectangular silicon and thickness t (t = 6, 7, 8, 9, 10, 11, and 12 nm) of silver film while the length l = 600 nm. The SPR is a lateral length dependence of silver film. The plasma resonance of the two first-order modes is distributed symmetrically on both sides of the local field in RCM, and it is irrelevant with the position of the vibration mode and the thickness of the silver film. On the basis of the above research, we propose to create a guided-wave resonance that can be directly observed from the normal incidence transmission spectra and electric field distribution. This structure can be used as a highly tunable optical sensitive element that can be tuned with a small change of transverse silver film length. [ABSTRACT FROM AUTHOR]

In this paper, the surface plasmon resonance (SPR) of rectangular cavity is investigated in Ag-Si-SiO2 under near-infrared light incident by finite-difference time-domain (FDTD). Between the surface plasma and the thickness of the silver film, the length of the silver film, the thickness of silicon, and the position of silicon, these relationships will be studied in a rectangular cavity, which is surrounded by silver film, two rectangular nanoscale silicons, and silicon dioxide. The surface plasmon resonance of the RCM is independent of the distance between the two silicons when the transverse silver film length l is fixed and of height d = 10k (k = 1, 2, 3, 4, and 5) nm of rectangular silicon and thickness t (t = 6, 7, 8, 9, 10, 11, and 12 nm) of silver film while the length l = 600 nm. The SPR is a lateral length dependence of silver film. The plasma resonance of the two first-order modes is distributed symmetrically on both sides of the local field in RCM, and it is irrelevant with the position of the vibration mode and the thickness of the silver film. On the basis of the above research, we propose to create a guided-wave resonance that can be directly observed from the normal incidence transmission spectra and electric field distribution. This structure can be used as a highly tunable optical sensitive element that can be tuned with a small change of transverse silver film length. [ABSTRACT FROM AUTHOR]

Objective: To appreciate clinically of masked mastoiditis to explored how to reduce the incidence and associated morbidity of otogenic complications., Methods: Between January 1998 and February 2005, 11 cases of masked mastoiditis were collected retrospectively. Their clinical presentation, results of investigations, and response to treatment were reviewed., Results: Of 11 cases, there were 8 cases with hearing impairment, 5 cases with otalgia, 4 cases with facial nerve palsy, one patient with postauricular subperiosteal abscess, one case with meningitis, and one with thrombosis of the lateral sinus. Computed tomography (CT) scan revealed blurring (haziness) of the mastoid air-cells. After admission, intravenous antibiotics were prescribed and antro-mastoidectomy or mastoidectomy was performed for eradication of infection source. The predominant finding at mastoidectomy was granulation tissue filling the mastoid cavity and antrum. A varying amount of pus and osteitis was found in the 5 cases. The granulations into the antrum were severe, obstructing the drainage into the attic and the middle ear. The mastoid tip cells were filled with granulation tissue which spared the antrum. The patients recovered excellently postoperative, without facial palsy, vertigo or other complications., Conclusions: To be a contemporary otologist, such severe complications of otologic diseases should not be overlooked. Appropriate intravenous antibiotics and adequate surgeries, as soon as possible, were recommended. Advanced CT scans of the temporal bone were necessary. Failure to identify associated concomitant pathology might result in treatment failure or persistent neurological deficit.