Giant third-harmonic in porous silicon photonic crystals and microcavities

Dolgova, T. V.; Maidykovski, A. I.; Martemyanov, M.G.; Fedyanin, Andrey A.; Aktsipetrov, O. A.

doi:10.1134/1.1463107

Cited by 37 publications

(11 citation statements)

References 10 publications

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“…[18][19][20] Nonlinear optical phenomena have been studied to a lesser extent even though it is widely recognized that the ability of photonic structures to localize and enhance electromagnetic fields in small spatial regions gives a unique opportunity to obtain strong nonlinear effects such as high harmonic generation, optical bistability, etc., with the main potential technological goal of developing all-optical signal processing. 21,22 At present, experimental and theoretical studies of methods to render the higher harmonic generation more efficient are focused on several major directions: ͑1͒ The band gap effect in photonic crystals, where the low group velocity and high density of states near the photonic band gap edge allows for the phase matching and efficient higher harmonic generation; [23][24][25][26][27] ͑2͒ enhancement of the fundamental field in controlled defects created in photonic crystals; 21,28,29 ͑3͒ enhancement of the electromagnetic field using confinement of surface plasmon polaritons by special structures at surfaces; 30 and ͑4͒ enhancement of the fundamental field at grating structures. Importantly, grating structures reveal a strong second harmonic generation at the wavelengths of the fundamental field corresponding to the enhanced transmission, reflection, or adsorption of the incident radiation.…”

Section: Introductionmentioning

confidence: 99%

Second harmonic generation from arrays of subwavelength cylinders

Marinica

Borisov²,

Shabanov³

2007

Phys. Rev. B

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We show that periodic arrays of thin dielectric cylinders with dielectric constant higher than that of surrounding media can be used for an efficient second harmonic generation. The amplitude of the second harmonic reaches its absolute maximum when the fundamental and second harmonic fields are both in resonance with trapped modes ͑quasistationary states͒ of the structure. It is shown that the double resonance condition together with the phase matching condition for the second harmonic generation can be achieved by a suitable choice of the array geometry. The physical reason for the efficient second harmonic generation is an enhancement of electromagnetic fields on the cylinders at resonances, and a long interaction time between fundamental and second harmonic fields trapped by the structure. The same structure can be used within a wide range of the incident radiation wavelength, because the resonant conditions are shown to be always satisfied through the choice of the angle of incidence.

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Section: Introductionmentioning

confidence: 99%

Second harmonic generation from arrays of subwavelength cylinders

Marinica

Borisov²,

Shabanov³

2007

Phys. Rev. B

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“…In terms of active devices, resonant modes have 2 been used to enhance intrinsic light emission from PSi and other optically active dopants (e.g. rare earth ions [21], Rhodamine dyes [22], colloidal quantum dots [23]), whilst periodic Bragg reflectors have been used to enhance nonlinear optical effects of second (SHG) and third harmonic generation (THG) [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Optical bistability in mesoporous silicon microcavity resonators

Pham

Qiao

Guan

et al. 2011

Journal of Applied Physics

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Porous silicon (PSi) has been shown to be a material with varieties of nonlinear optical properties. These properties have been discussed in terms of its nature of photoluminescence mechanism such as quantum confinement, surface states and the role of impurities. PSi has also been shown to be a useful material for optical devices, and have potential applications in fields such as bio-sensing and efficient lighting. In the following thesis, I present my theoretical and experimental results in studying a nonlinear optical property, known as optical bistability, in mesoporous silicon microcavity devices. The results show significant optical hysteresis in the transmission and reflection properties of mesoporous silicon microcavities when illuminated with a 150 nanosecond pulsed laser at 532 nm. The 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. Modeling suggests that the observed effects are due to changes in the nonlinear refractive index and the transient lifetime increases with increasing porosity. The role of surface states was also investigated on influencing the bistable process by passivating the internal porous surface with hydrosilylation chemistry. The role of the number of periods in the cavity structure is also studied. The cavity is doped with quantum dot to improve its switching intensity. The optical bistable property of the cavity was also investigated by using a 532 nm continuous wave (CW) laser with maximum power of 10 mW, modulated by an optical chopper. The only sample that yields significant hysteresis is the sample doped with quantum dot, with millisecond respone time. The results show that the sample doped with quantum dot shows both electronic and thermal process in forming optical hysteresis. Finally, I develop a theoretical model to study the transient hysteresis shape. The model suggests that the power and pulse width of the excitation laser source strongly influence the shaping of the bistable curves. The nature of the nonlinear refractive index is also quantified in terms of the power and the width of the excitation pulse. The third order nonlinear coefficient is calculated to be in the order of 10-10 esu while the passivated samples yield results in the order of 10-9 esu, which agree with previous findings in literature.

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“…Such cavities are expected to increase external photoluminescence efficiency of pSi through the Purcell effect enhancement and by restricting the radiation direction for easier collection. The cavities are also of interest for the study of nonlinear effect in porous Si 13,14 . Potential applications of the proposed structures are numerous.…”

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confidence: 99%

Two-dimensional porous silicon photonic crystal light emitters

Makarova

Vučković

Sanda

et al. 2006

2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference

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We present the design, fabrication and preliminary experiments of two-dimensional photonic crystal cavities made in nanoporous silicon luminescent at 700-800 nm. Enhancement in photoluminescence extraction efficiency at the resonant wavelength is expected due to Purcell effect and directed radiation pattern defined by the cavity. Such cavities should also enhance nonlinearities exhibited by porous Si beyond what is observed in one-dimensional distributed Bragg reflection cavities due to their small mode volumes and modest quality factors. This design aligns itself well to integration with conventional silicon based electronics on a single chip.

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Giant third-harmonic in porous silicon photonic crystals and microcavities

Cited by 37 publications

References 10 publications

Second harmonic generation from arrays of subwavelength cylinders

Second harmonic generation from arrays of subwavelength cylinders

Optical bistability in mesoporous silicon microcavity resonators

Two-dimensional porous silicon photonic crystal light emitters

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