APL Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter iResearch App Facebook

BROWSE VOLUMES

Year Range: 
Search Issue | RSS Feeds RSS
Previous Issue Next Issue

3 Aug 2009

Volume 95, Issue 5, Articles (05xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 95, 052901 (2009); http://dx.doi.org/10.1063/1.3190518 (3 pages)

Didit Yudistira, Sarah Benchabane, Davide Janner, and Valerio Pruneri
Enlarge Image | Read More
Return to All Sections
back to top
RSS Feeds

High quality AlN for deep UV photodetectors

S. Nikishin, B. Borisov, M. Pandikunta, R. Dahal, J. Y. Lin, H. X. Jiang, H. Harris, and M. Holtz

Appl. Phys. Lett. 95, 054101 (2009); http://dx.doi.org/10.1063/1.3200229 (3 pages) | Cited 5 times

Online Publication Date: 6 August 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
We have prepared large-area, 0.50×0.55 mm2, metal-semiconductor-metal photodetectors based on AlN layers with different density of inversion domains (IDs). AlN layers were grown on (0001) sapphire substrates using gas source molecular beam epitaxy. The introduction of AlN/GaN short period superlattices after growth of AlN nucleation layer yields significant reduction in the ID density. Photodetectors with ID density of 106 cm−2 exhibit a very low dark current of 0.5 fA at zero bias, which remains below 50 fA up to a bias of ±30 V. The peak responsivity of 0.08 A/W was obtained at a wavelength of ∼ 202 nm.
Show PACS
85.60.Gz Photodetectors (including infrared and CCD detectors)
81.15.Hi Molecular, atomic, ion, and chemical beam epitaxy

Ferromagnetic shape memory alloys for positioning with nanometric resolution

Jorge Feuchtwanger, Estibalitz Asua, Alfredo García-Arribas, Victor Etxebarria, and Jose M. Barandiaran

Appl. Phys. Lett. 95, 054102 (2009); http://dx.doi.org/10.1063/1.3194299 (3 pages) | Cited 4 times

Online Publication Date: 7 August 2009

Full Text: Read Online (HTML) | Download PDF

Show Abstract
Ferromagnetic shape memory alloys are promising active elements for actuators. Our work centered on achieving and maintaining an intermediate fixed deformation so that they can be used as precision positioning actuators. For this purpose, a custom actuator was built using a single crystal of NiMnGa. The results show that these alloys can be controlled within less than 5 nm for both precision and accuracy, a result comparable to piezoelectric ceramics. Interestingly, the defect structure plays a fundamental role in achieving such performance. The stochastically distributed defects determine a progressive diminution of the magnetic field strength required to achieve the control.
Show PACS
81.40.Lm Deformation, plasticity, and creep
75.50.Cc Other ferromagnetic metals and alloys
62.20.fg Shape-memory effect; yield stress; superelasticity
Return to All Sections
Close

Google Calendar

ADVERTISEMENT

Go to AIP Home   © AIP Publishing LLC
close