Measurement of the χ^(2) tensors of KTiOPO_4, KTiOAsO_4, RbTiOPO_4, and RbTiOAsO_4 crystals

Pack, Michael V.; Armstrong, Darrell J.; Smith, Arlee V.

doi:10.1364/ao.43.003319

Cited by 65 publications

(47 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sample is set on a two-axis stage, which allows mapping the SHG intensity on the surface of the sample. As previously mentioned, according to the symmetry of the χ (2) tensor, no SHG should be observed from bulk RTP for a fundamental beam propagating parallel to the c-polar direction (z-axis of the nonlinear tensor) [15]. However, the symmetry relaxation at interfaces allows SHG at the ferroelectric domain boundaries, which indeed behave as nanometric nonlinear second harmonic sources [16].…”

Section: Resultsmentioning

confidence: 95%

“…Additionally, due to the experimental configuration used in our work and to the symmetry of the χ (2) quadratic susceptibility tensor of RTP [15], the obtained nonlinear response is spatially restricted to the ferroelectric domain boundaries, which, in fact, act as nanosized SHG sources [16], providing additional spatial control on the process. The obtained results are of particular technological relevance since they open the pathway to new efficient frequency-doubling nano-devices in a scalable and cost-effective implementation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plasmonic enhancement of second harmonic generation from nonlinear RbTiOPO_4 crystals by aggregates of silver nanostructures

Sánchez‐García¹,

Tserkezis²,

Ramı́rez³

et al. 2016

Opt. Express

View full text Add to dashboard Cite

Abstract:We demonstrate a 60-fold enhancement of the second harmonic generation (SHG) response at the nanoscale in a hybrid metal-dielectric system. By using complex silver nanostructures photochemically deposited on the polar surface of a ferroelectric crystal, we tune the plasmonic resonances from the visible to the near-infrared (NIR) spectral region, matching either the SH or the fundamental frequency. In both cases the SHG signal at the metal-dielectric interface is enhanced, although with substantially different enhancement values: around 5 times when the plasmonic resonance is at the SH frequency or up to 60 times when it matches the fundamental NIR radiation. The results are consistent with the more spatially-extended near-field response of complex metallic nanostructures and can be well explained by taking into account the quadratic character of the SHG process. The work points out the potential of aggregates of silver nanostructures for enhancing optical nonlinearities at the nanoscale and provides an alternative approach for the development of nanometric nonlinear photonic devices in a scalable way. References and links1. J. A. Armstrong, N. Bloembergen, J. Ducuing, and P. S. Pershan, "Interactions between light waves in a nonlinear dielectric," Phys. Rev. 127(6), 1918-1939 (1962). 2. P. Franken, A. E. Hill, C. W. Peters, and G. Weinreich, "Generation of optical harmonics," Phys. Rev. Lett. 7(4), 118-120 (1961). 1720-1723 (2011). 9. H. Aouani, M. Rahmani, M. Navarro-Cía, and S. A. Maier, "Third-harmonic-upconversion enhancement from a single semiconductor nanoparticle coupled to a plasmonic antenna," Nat. Nanotechnol. 9(4), 290-294 (2014). 10. N. Kauranen and A. V. Zayats, "Nonlinear plasmonics," Nat. Photonics 6(11), 737-748 (2012 harmonic emission by plasmonic resonances at the second harmonic wavelength," Nano Lett. 15(6), 3917-3922 (2015).

show abstract

Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Plasmonic enhancement of second harmonic generation from nonlinear RbTiOPO_4 crystals by aggregates of silver nanostructures

Sánchez‐García¹,

Tserkezis²,

Ramı́rez³

et al. 2016

Opt. Express

View full text Add to dashboard Cite

show abstract

“…Its electro-optic coefficients are well known [15][16][17] and it is, thus, very well suited to characterize our technique to produce RF radiation.…”

mentioning

confidence: 99%

“…(1). By inserting the known values of the nonlinear electro-optic coefficient of KTP [17], the values of the direction cosines can be determined by comparison with the fit parameters in Eq. (1).…”

mentioning

confidence: 99%

Generation of microwave radiation by nonlinear interaction of a high-power, high-repetition rate, 1064 nm laser in KTiOPO_4 crystals

2013

View full text Add to dashboard Cite

We report measurements of microwave (RF) generation in the centimeter band accomplished by irradiating a nonlinear KTiOPO4 crystal with a home-made, infrared laser at 1064 nm as a result of optical rectification. The laser delivers pulse trains of duration up to 1 μs. Each train consists of several high-intensity pulses at an adjustable repetition rate of approximately 4.6 GHz. The duration of the generated RF pulses is determined by that of the pulse trains. We have investigated both microwave- and second harmonic generation as a function of the laser intensity and of the orientation of the laser polarization with respect to the crystallographic axes of KTP.

show abstract

“…Different equations for RTP have been reported [4,17]. In this Letter, the parameters for the phase-matching of the RTP crystal have been calculated by using the nonlinear coefficient [18] and Sellmeier equations by Mikami et al [17] as follows: (1) Figure 1 shows the parameters of the calculated tuning curve, including signal and idler wavelengths, walk-off angle, and the effective nonlinear coefficient (d eff ) for RTP-OPO pumped at 1064 nm in the xz plane. The highest d eff and no walk-off occur in NCPM at (θ 90°, ϕ 0°), corresponding to the signal wavelength around 1.62 μm and the idler wavelength around 3.1 μm.…”

mentioning

confidence: 99%

Efficient RTP-based OPO intracavity pumped by an acousto-optic Q-switched Nd:YVO_4 laser

Duan

Zhu

et al. 2014

Opt. Lett.

View full text Add to dashboard Cite

This Letter describes an intracavity pumped optical parametric oscillator (OPO) based on noncritical phase matching RbTiOPO4 (RTP) crystal driven by a laser diode end-pumping acousto-optic Q-switched Nd:YVO4 laser. Simultaneous efficient signal light at 1.6 μm and idler light at 3.1 μm outputs were obtained. At an incident pump power of 10.5 W and a Q-switching pulse repetition frequency of 60 kHz, 1.42 W at center wavelength of about 1619 nm and 0.38 W at 3108 nm were achieved, with the diode to OPO total output conversion efficiency up to 17.1%. The pulse width is about 6.5 ns for the signal light corresponding to the fundamental light at 1064 nm of about 10 ns. The spectral widths of the signal and idler light are narrower than 0.5 and 1.0 nm. The result shows that the RTP crystal is an efficient crystal to generate eye-safe and mid-infrared lights by making full use of noncritical phase matching.

show abstract

Measurement of the χ^(2) tensors of KTiOPO_4, KTiOAsO_4, RbTiOPO_4, and RbTiOAsO_4 crystals

Abstract: We use the separated-beams method to measure the second-order nonlinear optical tensors of the crystals KTiOPO4, KTiOAsO4, RbTiOPO4, and RbTiOAsO4 for second-harmonic generation of 1064-nm light. Our results agree well with most previous measurements but have improved precision.

Cited by 65 publications

References 15 publications

Plasmonic enhancement of second harmonic generation from nonlinear RbTiOPO_4 crystals by aggregates of silver nanostructures

Plasmonic enhancement of second harmonic generation from nonlinear RbTiOPO_4 crystals by aggregates of silver nanostructures

Generation of microwave radiation by nonlinear interaction of a high-power, high-repetition rate, 1064 nm laser in KTiOPO_4 crystals

Efficient RTP-based OPO intracavity pumped by an acousto-optic Q-switched Nd:YVO_4 laser

Contact Info

Product

Resources

About