# US 11,896,052 B2 · Aerosol-generating device comprising a plasmonic heating element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,896,052 B2 - Document ID: US11896052B2 - Status: Granted - Kind: B2 - Application number: 16/961,475 - Filed: 2019-01-11 - Published: 2020-12-03 - Granted: 2024-02-13 - Earliest claimed: 2018-01-12 - Assignees: Philip Morris Products S.A. - Applicants: Philip Morris Products S.A. - Inventors: Rui Nuno Batista; Chiara Fasciani - Web page: https://patentgrep.com/patent/US11896052B2 ## CPC - A24F 40/46: Shape or structure of electric heating means - A24F 40/10: Devices using liquid inhalable precursors - A24F 40/20: Devices using solid inhalable precursors - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) ## Abstract An aerosol-generating device for heating an aerosol-forming substrate is provided, the aerosol-generating device including: a heating element configured to heat the aerosol-forming substrate when the aerosol-forming substrate is received by the aerosol-generating device, the heating element including a plurality of metallic nanoparticles configured to receive light and to generate heat by surface plasmon resonance. ## Claims ### Claim 1 An aerosol-generating device, comprising: a heating element comprising a plurality of metallic nanoparticles configured to receive light and to generate heat by surface plasmon resonance, wherein the heating element is configured to heat an aerosol-forming substrate. ### Claim 2 (depends on 1) The aerosol-generating device according to claim 1, further comprising a light source, wherein the heating element is further configured to receive the light from the light source and to generate heat by the surface plasmon resonance. ### Claim 3 (depends on 2) The aerosol-generating device according to claim 2, wherein the light source is configured to emit light comprising at least one wavelength between 380 nanometers and 700 nanometers. ### Claim 4 (depends on 2) The aerosol-generating device according to claim 2, wherein the light source is configured to have a peak emission wavelength of between 495 nanometers and 580 nanometers. ### Claim 5 (depends on 2) The aerosol-generating device according to claim 2, wherein the light source comprises at least one of a light emitting diode and a laser. ### Claim 6 (depends on 2) The aerosol-generating device according to claim 2, wherein the light source comprises a plurality of light sources, and wherein at least one of the light sources is configured to irradiate only a portion of the plurality of metallic nanoparticles. ### Claim 7 (depends on 2) The aerosol-generating device according to claim 2, further comprising: an electrical power supply; and a controller configured to supply electrical power from the electrical power supply to the light source. ### Claim 8 (depends on 1) The aerosol-generating device according to claim 1, wherein the plurality of metallic nanoparticles comprise at least one of gold, silver, platinum, and copper. ### Claim 9 (depends on 1) The aerosol-generating device according to claim 1, wherein the plurality of metallic nanoparticles comprise a number average maximum diameter of less than 150 nanometers. ### Claim 10 (depends on 1) The aerosol-generating device according to claim 1, wherein the heating element further comprises a substrate layer and a coating layer on at least a portion of the substrate layer, and wherein the coating layer comprises the plurality of metallic nanoparticles. ### Claim 11 (depends on 10) The aerosol-generating device according to claim 10, wherein the coating layer is disposed on a first surface of the substrate layer, and wherein the first surface of the substrate layer comprises at least one of a plurality of protrusions and a plurality of depressions. ### Claim 12 (depends on 10) The aerosol-generating device according to claim 10, wherein the coating layer further comprises a plurality of discrete areas of metallic nanoparticles, and wherein the plurality of discrete areas are spaced apart from each other on the substrate layer. ### Claim 13 (depends on 1) The aerosol-generating device according to claim 1, wherein the heating element is further configured to receive a supply of electrical power to resistively heat the heating element. ### Claim 14 (depends on 1) The aerosol-generating device according to claim 1, wherein at least a portion of the heating element is porous. ### Claim 15 (depends on 1) The aerosol-generating device according to claim 1, further comprising a cavity configured to receive at least part of the aerosol-forming substrate. ### Claim 16 (depends on 15) The aerosol-generating device according to claim 15, wherein the heating element at least partially defines the cavity so that, when the aerosol-forming substrate is received within the cavity, at least part of the aerosol-forming substrate is received adjacent the heating element. ### Claim 17 (depends on 15) The aerosol-generating device according to claim 15, wherein at least part of the heating element extends into the cavity. ### Claim 18 (depends on 1) The aerosol-generating device according to claim 1, further comprising: a storage portion, wherein the aerosol-forming substrate is disposed within the storage portion. ### Claim 19 (depends on 1) An aerosol-generating system, comprising: the aerosol-generating device according to claim 1; and an aerosol-generating article comprising the aerosol-forming substrate, wherein the aerosol-generating device is configured to receive at least a portion of the aerosol-generating article.