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Practically the only analog application in widespread use is the spin Hall nano\u2010oscillator (SHNO) that delivers a high frequency alternating current or voltage to a load. Here, we report its analogue \u2013 a spin Hall nano\u2010antenna (SHNA) that radiates a high frequency electromagnetic wave into the surrounding medium. It can also radiate an acoustic wave into an underlying substrate if the nanomagnets are made of a magnetostrictive material. That makes it a\n                    <jats:italic>dual<\/jats:italic>\n                    electromagnetic\/acoustic antenna. The SHNA is made of an array of ledged magnetostrictive nanomagnets deposited on a substrate, with a heavy metal nanostrip underlying\/overlying the ledges. An alternating charge current passed through the nanostrip generates an alternating spin\u2013orbit torque (SOT) in the nanomagnets via the spin Hall effect, which makes their magnetizations oscillate in time with the frequency of the current, producing confined spin waves (magnons) in the nanomagnets. These spin waves radiate electromagnetic waves (photons) in space owing to the transfer of energy from magnons to photons, thereby implementing a\n                    <jats:italic>transmitting<\/jats:italic>\n                    antenna. Curiously, although the SHNA is much smaller in size than the radiated electromagnetic wavelength and hence qualifies as a \u201cpoint source\u201d, it does\n                    <jats:italic>not<\/jats:italic>\n                    radiate isotropically owing to the anisotropy of the (frequency\u2010dependent) spin wave patterns that form within the odd\u2010shaped nanomagnets, which endows the \u201cpoint source\u201d with internal\u00a0anisotropy.\n                  <\/jats:p>\n                  <jats:p>\n                    The same device can also act as a\n                    <jats:italic>receiving<\/jats:italic>\n                    antenna. Incident electromagnetic radiation generates polychromatic spin waves in the nanomagnets, which pump spin into the heavy metal nanostrips at their own frequencies, giving rise to a polychromatic alternating voltage across the latter owing to the ac inverse spin Hall effect. This implements the receiver. The transmitting\/receiving gain and radiation efficiency of the SHNA far exceed those of a conventional antenna of the same size, thereby enabling extreme antenna\u00a0miniaturization.\n                  <\/jats:p>","DOI":"10.1002\/advs.202520505","type":"journal-article","created":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T12:26:29Z","timestamp":1772972789000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Spin Hall Nano\u2010Antenna"],"prefix":"10.1002","volume":"13","author":[{"given":"Raisa","family":"Fabiha","sequence":"first","affiliation":[{"name":"Department of Electrical and Computer Engineering Virginia Commonwealth University Richmond Virginia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pratap Kumar","family":"Pal","sequence":"additional","affiliation":[{"name":"Department of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Kolkata India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Suche","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering Virginia Commonwealth University Richmond Virginia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amrit Kumar","family":"Mondal","sequence":"additional","affiliation":[{"name":"Department of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Kolkata India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erdem","family":"Topsakal","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering Virginia Commonwealth University Richmond Virginia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anjan","family":"Barman","sequence":"additional","affiliation":[{"name":"Department of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Kolkata India"},{"name":"Department of Physics, School of Natural Sciences Shiv Nadar Institution of Eminence  Dadri Uttar Pradesh India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6074-1212","authenticated-orcid":false,"given":"Supriyo","family":"Bandyopadhyay","sequence":"additional","affiliation":[{"name":"Department of Electrical and Computer Engineering Virginia Commonwealth University Richmond Virginia USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,2,25]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0375-9601(71)90196-4"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.83.1834"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1218197"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1038\/nature13534"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pmatsci.2020.100761"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1109\/TMAG.2021.3078583"},{"key":"e_1_2_10_8_1","doi-asserted-by":"publisher","DOI":"10.1063\/5.0067879"},{"key":"e_1_2_10_9_1","doi-asserted-by":"publisher","DOI":"10.1109\/JPROC.2016.2554518"},{"key":"e_1_2_10_10_1","doi-asserted-by":"publisher","DOI":"10.1088\/0022-3727\/48\/35\/353001"},{"key":"e_1_2_10_11_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-025-90627-7"},{"key":"e_1_2_10_12_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevApplied.11.054069"},{"key":"e_1_2_10_13_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.87.020402"},{"key":"e_1_2_10_14_1","doi-asserted-by":"publisher","DOI":"10.1063\/5.0228219"},{"key":"e_1_2_10_15_1","doi-asserted-by":"publisher","DOI":"10.1002\/admt.201901076"},{"key":"e_1_2_10_16_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevApplied.16.024048"},{"key":"e_1_2_10_17_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.3263727"},{"key":"e_1_2_10_18_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.3581099"},{"key":"e_1_2_10_19_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.1875762"},{"key":"e_1_2_10_20_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.81.140408"},{"key":"e_1_2_10_21_1","doi-asserted-by":"publisher","DOI":"10.1063\/1.3588038"},{"key":"e_1_2_10_22_1","first-page":"1","article-title":"Effect of Antenna Size on Gain, Bandwidth and Efficiency","volume":"64","author":"Harrington R. 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