Patent ID: 11914163
Assignee: INTERDIGITAL MADISON PATENT HOLDINGS, SAS
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. The device of claim 1, wherein the first step structure and the third step structures have a same first height H1, wherein the second step structure and the fourth step structure have a same second height H2, wherein the second height H2 has a value around, (
        
          
            d
            1
          
          2
        
        )
      
      ·
      
        γ
        1
      
    
    -
    
      H
      1
    
  
  ,, wherein d1 is the first distance, and γ1 is around, 1
    
      tan
      ⁢
      
        
        
          Θ
          
            B
            ⁢
            1
          
        
        
      
    
  
  ,, where ΘB1 is a nanojet beam radiation angle generated by the first step structure and the third step structure, wherein, Θ
    
      B
      ⁢
      1
    
  
  ≈
  
    
      
        9
        ⁢
        
          0
          ∘
        
      
      -
      
        Θ
        
          TIR
          1
        
      
    
    2, where, Θ
    
      TIR
      ⁢
      
        
      
      ⁢
      1
    
  
  =
  
    
      sin
      
        -
        1
      
    
    ⁡
    
      (
      
        
          n
          1
        
        
          n
          2
        
      
      ), is a first critical angle of refraction, n1 is the first refractive index value of the host medium, n2 is the second refractive index value of the first layer, wherein, (
  
    
      d
      2
    
    2
  
  ), has a value around H2/γ2, wherein d2 is the second distance, γ2 is around, 1
    
      tan
      ⁢
      
        
        
          Θ
          
            B
            ⁢
            2
          
        
        
      
    
  
  ,, where ΘB2 is a nanojet beam radiation angle generated by the second step structure and the fourth step structure, and wherein, Θ
    
      B
      ⁢
      2
    
  
  ≈
  
    
      
        9
        ⁢
        
          0
          ∘
        
      
      -
      
        Θ
        
          TIR
          2
        
      
    
    2, where, Θ
    
      TIR
      ⁢
      
        
      
      ⁢
      2
    
  
  =
  
    
      sin
      
        -
        1
      
    
    ⁡
    
      (
      
        
          n
          1
        
        
          n
          3
        
      
      ), is a second critical angle of refraction, and n3 is the third refractive index value of the second layer.