Results 151 to 160 of about 2,118,821 (229)
Some of the next articles are maybe not open access.
Nonlinear refractive index of photo-thermo-refractive glass
Optical Materials, 2006Abstract Nonlinear properties of a photo-thermo-refractive (PTR) glass are studied and compared with those in fused silica and a conventional optical glass. PTR glass is a new photosensitive medium for high-efficiency phase volume hologram recording which manifests a linear refractive index modulation after exposure to UV radiation followed by ...
Stephane Santran +6 more
openaire +2 more sources
Nonlinear absorption and nonlinear refraction in HgCdTe
SPIE Proceedings, 1990The large third order susceptibility of Hg1_CdTe makes it a very promising material for many applications, including optical switching. There have been numerous studies' 4) ofthe optical nonlinearities of Hg1_CdTe and it is well known that for values ofx near 0.2 and for 10.6 ,tm radiation, both nonlinear absorption arising from two photon absorption ...
Shekhar Guha +4 more
openaire +1 more source
Nonlinear Absorption and Nonlinear Refraction Studies in MEBBA
Topical Meeting on Ultrafast Phenomena, 1984In this paper we report measurements of nonlinear absorption and optical self-action (self-focusing) in 4-methyl benzylidene 4’-n-butylaniline (MEBBA) with picosecond pulses at 0.53 μm and 1.06 μm. P2, the second critical power for self-focusing [1], was measured as a function of pulsewidth (37 to 150 psec FWHM) and polarization state at 0.53 and 1.06 ...
M. J. Soileau +7 more
openaire +2 more sources
Single-shot measurement of nonlinear absorption and nonlinear refraction
Applied Optics, 2006A single-shot method for measurement of nonlinear optical absorption and refraction is described and analyzed. A spatial intensity variation of an elliptical Gaussian beam in conjugation with an array detector is the key element of this method. The advantages of this single-shot technique were demonstrated by measuring the two-photon absorption and ...
J, Jayabalan +2 more
openaire +2 more sources
Nonlinear refraction and absorption activity of dimethylaminostyryl substituted BODIPY dyes
, 2016Optical and nonlinear optical properties of difluoroboradiazaindacene (BODIPY) models with attached dimethylaminostyryl substituents were studied. The optical absorption and fluorescence emission of BODIPY compounds were found to be dependent on the ...
B. Kulyk +5 more
semanticscholar +1 more source
Nonlinear Absorption and Nonlinear Refraction of Self-Assembled Porphyrins
The Journal of Physical Chemistry B, 2006Nonlinear refraction and nonlinear absorption of self-assembled porphyrins in the nanosecond and picosecond regimes were studied at 532 nm by the Z-scan technique. First, a marked difference in nonlinear refraction was observed between self-assembled zinc porphyrins and free base porphyrins; however, the effects of self-assembly and metallization on ...
Zhi-Bo, Liu +5 more
openaire +2 more sources
Nonlinear spectroscopy: absorption and refraction
SPIE Proceedings, 2009We have been developing tools for nonlinear spectroscopy aimed toward the ultimate goal of building a nonlinear spectrophotometer analogous to the ubiquitous linear spectrophotometer where a sample is placed in the instrument, a button is pushed, and the absorption spectrum is obtained sometime later.
Eric Van Stryland +3 more
openaire +1 more source
Conical refraction in nonlinear optics
Optics Communications, 1969Abstract When a laser beam propagates along the optic axis of a nonlinear biaxial crystal, the generated harmonic radiation displays the nonlinear counterparts of internal and external conical refraction.
N. Bloembergen, H. Shih
openaire +1 more source
Refractive nonlinear response in thin nonlocal nonlinear media
Frontiers in Optics 2011/Laser Science XXVII, 2011We present a model to describe purely refractive local or nonlocal nonlinear response in thin media with any magnitude of photoinduced phase shift. The results are in agreement with self phase modulation and Z-scan experiments.
E. V. García Ramírez +4 more
openaire +1 more source
Nonlinear Refraction and Nonlinear Absorption in InAs
1984We report here experimental measurements taken with an HF laser of a large nonlinear index of refraction (n2 = 4.5 ± 2.0 × 10-5 cm2/W) and associated nonlinear absorption near the bandgap in InAs between 6°K and 100°K. These results are shown to be consistent with the bandgap resonant model used to explain the nonlinearities seen in InSb and HgCdTe ...
C. D. Poole, E. Garmire
openaire +1 more source