Holographic properties of the second-harmonic cross correlation of object and reference optical wave fields

Andreoni, Alessandra; Bondani, Maria; Potenza, M. A. C.; Denisyuk, Yuri N.

doi:10.1364/josab.17.000966

Cited by 19 publications

(16 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3͑a͒. 12,15 Moreover, such a resolution was qualitatively confirmed in the experiments we performed on a number of both 2D and 3D objects, 13,14 although the objects were necessarily illuminated through the diffuser S. 3͑b͔͒.…”

Section: Discussionsupporting

confidence: 64%

“…In previous works [12][13][14][15] in which the r-beam wave front was not modulated in amplitude we demonstrated that the wave front generated at 2 by SHCC reconstructs a holographic image of the object that had imprinted the amplitude ͑and phase͒ modulation onto the o-beam. This SHG holographic image is a virtual image ͑OЈ in Fig.…”

Section: Methodsmentioning

confidence: 66%

“…12,15 The better these conditions are fulfilled, the higher the optical quality of the SHG holographic image. In fact it propagates along all directions joining one crystal point to all points of the object and accumulates a phase delay dependent on the path length traveled along each direction.…”

Section: Discussionmentioning

confidence: 99%

“…12,15 As a rule, together with inputs A and B, we decided to also encode the complements of inputs A and B ͑i.e., Ā and B ͒ in the masks to be inserted into the o-and the r-beam pathways. The implementation of an OR gate is even more straightforward because its output is represented by the simple spatial superimposition of the optical input data.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Boolean algebra operations performed on optical bits by the generation of holographic fields through second-order nonlinear interactions

Andreoni

Bondani

Potenza

et al. 2001

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

Measurements of second-order susceptibility at λ=1.5 μm in CdTe-based ternary alloys for efficient wavelength conversion Boolean algebra operations such as AND or XOR are performed on optical bits encoded as amplitude modulations in two wave fronts that are made interact in a crystal (␤-BaB 2 O 4 ) endowed with second-order nonlinearity. If the corresponding wave fields are at the same frequency and the crystal is tuned for the phase-matched generation of 2, we show that the generated wave front reconstructs a holographic image containing the outputs of the desired operations. Since a nearly diffraction-limited optical resolution can be easily achieved in the holographic image at 2, a correspondingly high density of data is encodeable in the wave front at playing the role of object wave front. The experiments demonstrate the feasibility of the operation of a parallel half-adder performing the sum of multiple data with a one-digit binary number, which is encoded in the reference wave front.

show abstract

Section: Discussionsupporting

confidence: 64%

Section: Methodsmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Boolean algebra operations performed on optical bits by the generation of holographic fields through second-order nonlinear interactions

Andreoni

Bondani

Potenza

et al. 2001

Review of Scientific Instruments

Self Cite

View full text Add to dashboard Cite

show abstract

“…The coherence of the SHG process guarantees that the scattered 2 signals have a deterministic, static phase relationship with the 2 reference. It is worth noting that our scheme is fundamentally different from holography obtained in nonlinear crystals [20], where contrast is not achieved.…”

Section: Harmonic Holographymentioning

confidence: 84%

Harmonic holography: a new holographic principle

Pu¹,

Centurion²,

Psaltis³

2007

Appl. Opt.

View full text Add to dashboard Cite

The process of second harmonic generation (SHG) has a unique property of forming a sharp optical contrast between noncentrosymmetric crystalline materials and other types of material, which is a highly valuable asset for contrast microscopy. The coherent signal obtained through SHG also allows for the recording of holograms at high spatial and temporal resolution, enabling whole-field four-dimensional microscopy for highly dynamic microsystems and nanosystems. Here we describe a new holographic principle, harmonic holography ͑H 2 ͒, which records holograms between independently generated second harmonic signals and reference. We experimentally demonstrate this technique with digital holographic recording of second harmonic signals upconverted from an ensemble of second harmonic generating nanocrystal clusters under femtosecond laser excitation. Our results show that harmonic holography is uniquely suited for ultrafast four-dimensional contrast microscopy.

show abstract