论文信息 - Island size effects in nanoparticle-enhanced photodetectors

Island size effects in nanoparticle-enhanced photodetectors

We report the effect of metal-island size variation in nanoparticle-enhanced photodetectors. Nanoparticle size was controlled by varying the deposition and annealing conditions used to produce the metal-island films. Increasing the size of silver-island particles fabricated onto 165 nm thick silicon-on-insulator (SOI) photodetectors resulted in a dramatic increase in the observed photocurrent. A nearly factor-of-20 photocurrent enhancement was observed for light of wavelength 800 nm, a significant improvement over previously reported results. The improvement is linked to two physical effects: the increased scattering efficiency of the larger nanoparticles and a qualitative change in the resonance characteristics of the metal-island film due to radiative coupling to the SOI waveguide modes.

Dennis G. Hall | Howard R. Stuart | D. Hall | H. R. Stuart | H. Stuart

[1] Dennis G. Hall,et al. Enhanced Dipole-Dipole Interaction between Elementary Radiators Near a Surface , 1998 .

[2] D. Hall,et al. Thermodynamic limit to light trapping in thin planar structures , 1997 .

[3] N. Dutta,et al. Fabrication and performance characteristics of high-speed ion-implanted Si metal–semiconductor–metal photodetectors , 1997 .

[4] Stephen Y. Chou,et al. High-efficiency and high-speed silicon metal–semiconductor–metal photodetectors operating in the infrared , 1997 .

[5] Dennis G. Hall,et al. Absorption enhancement in silicon‐on‐insulator waveguides using metal island films , 1996 .

[6] Gabby Sarusi,et al. 1 Gb/s Si high quantum efficiency monolithically integrable λ=0.88 μm detector , 1995 .

[7] B. Van Zeghbroeck,et al. A novel high-speed silicon MSM photodetector operating at 830 nm wavelength , 1995, IEEE Electron Device Letters.

[8] S. Chou,et al. 140-GHz metal-semiconductor-metal photodetectors on silicon-on-insulator substrate with a scaled active layer , 1994 .

[9] Paul F. Liao,et al. Enhanced fields on rough surfaces: dipolar interactions among particles of sizes exceeding the Rayleigh limit , 1985 .

[10] G. W. Ford,et al. Electromagnetic interactions of molecules with metal surfaces , 1984 .

[11] Z. Kam,et al. Absorption and Scattering of Light by Small Particles , 1998 .