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Second-harmonic conical refraction: observation of free and forced harmonic waves

Research output: Contribution to Journal/MagazineJournal articlepeer-review

<mark>Journal publication date</mark>04/2011
<mark>Journal</mark>Applied Physics B
Issue number1
Number of pages4
Pages (from-to)9-12
Publication StatusPublished
Early online date7/04/11
<mark>Original language</mark>English


Observation of second-harmonic conical refraction in KTiOPO4 crystal is reported. Two second-harmonic conical patterns, namely forced and free harmonic waves, are identified and registered with exceptional clarity and level of details. The forced second-harmonic wave evolves into the characteristic ring intensity distribution while the free-harmonic wave gives a single ray direction, resulting in a spot.