Frequency conversion, nonlinear absorption and carrier dynamics of GaSe:B/Er crystals

YÜKSEK M., KARATAY A., Ertap H., ELMALI A., KARABULUT M.

OPTICAL MATERIALS, cilt.66, ss.137-141, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 66
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.optmat.2017.02.007
  • Dergi Adı: OPTICAL MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.137-141
  • Anahtar Kelimeler: Frequency conversion, Nonlinear absorption, Carrier dynamics, GaSe, Erbium, Boron, 2-PHOTON ABSORPTION, OPTICAL-PROPERTIES, GALLIUM SELENIDE, SHG, SEMICONDUCTORS, ANISOTROPY
  • Ankara Üniversitesi Adresli: Evet

Özet

We aimed to investigate the influence of Er3+ rare earth element on the frequency conversion wavelength in boron doped GaSe crystals. It was found that by substitution of Er3+ with B3+, SHG signal shifted to higher wavelength. In addition, the nonlinear absorption properties and ultrafast dynamics of pure, 0.5 at% B3+ and 0.25 at% B3+ + 0.25 at% Er3+ doped GaSe cristals have been studied by open aperture Z-scan and ultrafast pump probe spectroscopy techniques. All of the studied crystals showed nonlinear absorption (NA). It was observed that 0.5 at% B3+ doped GaSe crystal showed bleach signal. This signal switched to NA signal with long life after substitution of 0.25 at% Er3+ with 0.25 at% B3+. (C) 2017 Elsevier B.V. All rights reserved.