Optical bistability in mesoporous silicon microcavity resonators | Zendy

Anh Pham | Zendy; Hong Qiao | Zendy; Bin Guan | Zendy; M. Ga�l | Zendy; J. Justin Gooding | Zendy; Peter J. Reece | Zendy

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Optical bistability in mesoporous silicon microcavity resonators

Author(s) -

Anh Pham,

Hong Qiao,

Bin Guan,

M. Ga�l,

J. Justin Gooding,

Peter J. Reece

Publication year - 2011

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3585782

Subject(s) - optical bistability , bistability , porous silicon , materials science , hydrosilylation , hysteresis , resonator , silicon , porosity , optoelectronics , refractive index , mesoporous material , reflection (computer programming) , optical microcavity , laser , optics , nonlinear optics , condensed matter physics , composite material , chemistry , biochemistry , physics , computer science , programming language , catalysis

We report on the observation of significant optical bistability in the transmission and reflection properties of mesoporous silicon microcavities when illuminated with a 150 ns pulsed laser at 532 nm. The observed optical hysteresis is shown to be transient in nature and the properties are strongly dependent on the porosity of the cavity layer. The onset and damage threshold intensity are also shown to be porosity dependent. Our modeling suggests that the observed effects are due to changes in the nonlinear refractive index where the transient lifetime increases with increasing porosity. We investigate the role of surface states on influencing the bistable process by passivating the internal porous surface with hydrosilylation chemistry.

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