US 10,892,548 B2
Photoconductive antenna array
Andrea Neto, Delft (NL); Alessandro Garufo, Delft (NL); Giorgio Carluccio, Delft (NL); and Nuria Llombart Juan, Delft (NL)
Assigned to TECHNISCHE UNIVERSITEIT DELFT, Delft (NL)
Appl. No. 15/750,060
Filed by Technische Universiteit Delft, Delft (NL)
PCT Filed Aug. 4, 2016, PCT No. PCT/NL2016/050567
§ 371(c)(1), (2) Date Feb. 2, 2018,
PCT Pub. No. WO2017/023172, PCT Pub. Date Feb. 9, 2017.
Claims priority of application No. 2015262 (NL), filed on Aug. 4, 2015.
Prior Publication US 2018/0226715 A1, Aug. 9, 2018
Int. Cl. H01Q 3/00 (2006.01); H01Q 3/26 (2006.01); H01L 31/0232 (2014.01); H01Q 19/06 (2006.01); H01Q 21/06 (2006.01); G02F 2/02 (2006.01); H01L 31/09 (2006.01); H04B 10/90 (2013.01)
CPC H01Q 3/2676 (2013.01) [H01L 31/02325 (2013.01); H01Q 19/062 (2013.01); H01Q 21/061 (2013.01); G02F 2/02 (2013.01); G02F 2202/12 (2013.01); G02F 2203/13 (2013.01); H01L 31/09 (2013.01); H04B 10/90 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A photoconductive antenna, comprising:
a photoconductive substrate;
an array of antenna electrodes on or in the photoconductive substrate;
a bias circuit configured to determine voltages applied to the antenna electrodes by capacitive voltage division over a series of successive capacitors, each capacitor being formed by the antenna electrodes of a respective pair of successive ones of the antenna electrodes in the array as plates of the capacitor; wherein the successive ones of the antenna electrodes of each of the respective pairs are separated by gaps between pairs of successive ones of the antenna electrodes; wherein the successive ones of the antenna electrodes of each of the respective pairs are separated by a respective slot, each slot comprising a narrowed sub-section leaving said gap between pairs of successive ones of the antenna electrodes; wherein the slot is narrower in the narrowed sub-section than outside said narrowed sub-section; the photoconductive antenna further comprising:
a plurality of micro-lenses located over the photoconductive substrate, each micro-lens being configured to concentrate incoming light on a part of the photoconductive substrate on or in which a respective one of the gaps is located.