Publication

Theoretical and experimental study of a 30nm metallic slot array

Hans Peter Herzig, Qing Tan, Armando Cosentino
2011
Journal Articles

Abstract

We present the simulation, fabrication, and characterization of a metallic slot grating on a silicon waveguide (30nm slot width for a period of 500nm). According to the simulation, the experimental measured spectrum of the structure exhibits a dip in the near-infrared region. Moreover, the finite-difference time-domain simulation shows that this device can be used as a sensor, due to its high sensitivity to the refractive index variation of the medium above and inside the cavity (η ¼ Δλ=Δn ¼ 750nm=refractive index unit).

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https://infoscience.epfl.ch/entities/publication/b19e6fdf-17e7-4aef-9752-ef199f0bfee3

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Hans Peter Herzig, Qing Tan, Armando Cosentino
2011
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/b19e6fdf-17e7-4aef-9752-ef199f0bfee3

About this result

Related concepts (21)

Near-infrared spectroscopy

Near-infrared spectroscopy (NIRS) is a spectroscopic method that uses the near-infrared region of the electromagnetic spectrum (from 780 nm to 2500 nm). Typical applications include medical and physiological diagnostics and research including blood sugar, pulse oximetry, functional neuroimaging, sports medicine, elite sports training, ergonomics, rehabilitation, neonatal research, brain computer interface, urology (bladder contraction), and neurology (neurovascular coupling).

Infrared spectroscopy

Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) is the measurement of the interaction of infrared radiation with matter by absorption, emission, or reflection. It is used to study and identify chemical substances or functional groups in solid, liquid, or gaseous forms. It can be used to characterize new materials or identify and verify known and unknown samples. The method or technique of infrared spectroscopy is conducted with an instrument called an infrared spectrometer (or spectrophotometer) which produces an infrared spectrum.

Emission spectrum

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an electron making a transition from a high energy state to a lower energy state. The photon energy of the emitted photon is equal to the energy difference between the two states. There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum.

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