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Characterization of subsurface damage in GaAs processed by Ga+ focused ion-beam-assisted Cl2 etching using photoluminescence (1989)

Taneya, M. ; Sugimoto, Y. ; Akita, K.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 66 (1989), S. 1375-1381

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: Subsurface damage in GaAs processed by a Ga+ focused ion-beam-assisted Cl2 etching is studied by photoluminescence (PL) measurement. The PL intensity of the processed sample decreased to (1)/(30) – (1)/(40) compared to that of the unprocessed sample. The recovery of PL intensity by a step removal of the damaged layer is observed as a function of the removed layer thickness. The removal of a 0.7-μm-thick surface layer enables the PL intensity to be recovered perfectly, which leads to the postulate that the damaged layer thickness is 0.7 μm at least, which is much larger than the ion range (about 0.01 μm). The recovery of PL intensity is analyzed on a one-dimensional model in the direction normal to the sample surface. Computer simulations of PL intensity are carried out. The calculated result fully explains the experimental PL intensity recovery as a function of the removed layer thickness, which gives the profile of subsurface damage in the sample.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.344439

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Oncocytic adenocarcinoma of the ovary (1983)

Takeda, A. ; Matsuyama, M. ; Sugimoto, Y. ; [et al.]

Springer

Virchows Archiv 399 (1983), S. 345-353

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ISSN: 1432-2307

Keywords: Oncocyte ; Adenocarcinoma ; Ovary

Source: Springer Online Journal Archives 1860-2000

Topics: Medicine

Notes: Summary A case of ovarian adenocarcinoma mainly composed of oncocytes was studied by light and electron microscopy. Oncocytes, characterized by granular and eosinophilic cytoplasm by light microscopy possessed numerous mitochondria at the ultrastructural level. These oncocytes were classified into two types: typical and condensed oncocytes. Typical oncocytes seemed to be active, whereas condensed oncocytes were thought to be involved in a degenerative process. The two types of cells showed a close similarity to oncocytes in other organs (e.g., thyroid, parathyroid and salivary glands). This appears to be the first report of an ovarian oncocytic tumor.