The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 2005
Filed:
May. 18, 2001
David C W Herbert, Worcs, GB;
Edward T R Chidley, Worcs, GB;
Roger T Carline, Worcs, GB;
Weng Y Leong, Worcs, GB;
David R Wight, Worcs, GB;
David J Robbins, Worcs, GB;
John M Heaton, Worcs, GB;
David C W Herbert, Worcs, GB;
Edward T R Chidley, Worcs, GB;
Roger T Carline, Worcs, GB;
Weng Y Leong, Worcs, GB;
David R Wight, Worcs, GB;
David J Robbins, Worcs, GB;
John M Heaton, Worcs, GB;
QinetiQ Limited, Farnborough, GB;
Abstract
A horizontal access semiconductor photo detector () comprises a horizontal light absorbing layer () for converting light into photo-current which layer is configured to confine light within it in whispering gallery modes of propagation. The detector is configured to have a first waveguide portion () and a second light confining portion () arranged such that the waveguide portion couples light into the detector and transfers light into the light confining portion so as to excite whispering gallery modes of propagation around the light confining portion. The light absorbing layer may be part of the light confining portion or alternatively light can be coupled into the light confining portion or alternatively light can be coupled into the light absorbing layer from the light confining portion by evanescent coupling. The excitation of whispering gallery modes within the light absorbing layer significantly increases the effective absorption coefficient of the light absorbing layer.